2026-07-10 18:26:56 +03:30
35 changed files with 1819 additions and 454 deletions
--- a/backend/package.json
+++ b/backend/package.json
@@ -22,7 +22,8 @@
    "prisma:migrate": "prisma migrate dev",
    "prisma:deploy": "prisma migrate deploy",
    "prisma:seed": "prisma db seed",
-    "prisma:reset-treatment": "ts-node prisma/reset-treatment-data.ts"
+    "prisma:reset-treatment": "ts-node prisma/reset-treatment-data.ts",
+    "prisma:regenerate-tasks": "ts-node prisma/regenerate-lab-tasks.ts"
  },
  "prisma": {
    "seed": "ts-node prisma/seed.ts"
--- a/backend/prisma/migrations/20260707130000_lab_workflow_refactor/migration.sql
+++ b/backend/prisma/migrations/20260707130000_lab_workflow_refactor/migration.sql
@@ -0,0 +1,83 @@
+-- Lab workflow refactor: remove task assignment/priority, group tasks by prosthesis,
+-- add importance flag, status timeline, and per-case comments.
+-- Local dev data only: existing tasks are truncated and regenerated on next dispatch/send.
+
+-- 1. Clear existing task data (task shape changes: tooth -> teeth[]).
+TRUNCATE TABLE "lab_case_tasks" CASCADE;
+
+-- 2. Drop assignment / priority machinery.
+ALTER TABLE "lab_case_tasks" DROP CONSTRAINT IF EXISTS "lab_case_tasks_assigneeUserId_fkey";
+DROP INDEX IF EXISTS "lab_case_tasks_assigneeUserId_priority_createdAt_idx";
+DROP INDEX IF EXISTS "lab_case_tasks_assignedAt_labCaseId_priority_idx";
+DROP INDEX IF EXISTS "lab_case_tasks_labCaseId_treatmentDetailId_tooth_stepOrder_key";
+
+ALTER TABLE "lab_case_tasks"
+  DROP COLUMN IF EXISTS "assigneeUserId",
+  DROP COLUMN IF EXISTS "assignedAt",
+  DROP COLUMN IF EXISTS "priority",
+  DROP COLUMN IF EXISTS "tooth";
+
+-- 3. Rebuild LabTaskStatus enum without PENDING.
+ALTER TABLE "lab_case_tasks" ALTER COLUMN "status" DROP DEFAULT;
+ALTER TYPE "LabTaskStatus" RENAME TO "LabTaskStatus_old";
+CREATE TYPE "LabTaskStatus" AS ENUM ('IN_PROGRESS', 'COMPLETED');
+ALTER TABLE "lab_case_tasks"
+  ALTER COLUMN "status" TYPE "LabTaskStatus" USING ("status"::text::"LabTaskStatus");
+ALTER TABLE "lab_case_tasks" ALTER COLUMN "status" SET DEFAULT 'IN_PROGRESS';
+DROP TYPE "LabTaskStatus_old";
+
+-- 4. New task columns.
+ALTER TABLE "lab_case_tasks" ADD COLUMN "teeth" JSONB NOT NULL DEFAULT '[]';
+ALTER TABLE "lab_case_tasks" ALTER COLUMN "teeth" DROP DEFAULT;
+ALTER TABLE "lab_case_tasks" ADD COLUMN "isImportant" BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE "lab_case_tasks" ADD COLUMN "lastStatusChangedByUserId" TEXT;
+ALTER TABLE "lab_case_tasks" ADD COLUMN "lastStatusChangedAt" TIMESTAMP(3);
+
+-- 5. New unique + indexes.
+CREATE UNIQUE INDEX "lab_case_tasks_labCaseId_treatmentDetailId_prosthesisTypeCode_stepOrder_key"
+  ON "lab_case_tasks"("labCaseId", "treatmentDetailId", "prosthesisTypeCode", "stepOrder");
+CREATE INDEX "lab_case_tasks_labCaseId_isImportant_idx"
+  ON "lab_case_tasks"("labCaseId", "isImportant");
+
+ALTER TABLE "lab_case_tasks" ADD CONSTRAINT "lab_case_tasks_lastStatusChangedByUserId_fkey"
+  FOREIGN KEY ("lastStatusChangedByUserId") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- 6. Task status timeline.
+CREATE TABLE "lab_case_task_status_events" (
+  "id" TEXT NOT NULL,
+  "taskId" TEXT NOT NULL,
+  "fromStatus" "LabTaskStatus",
+  "toStatus" "LabTaskStatus" NOT NULL,
+  "changedByUserId" TEXT,
+  "changedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  CONSTRAINT "lab_case_task_status_events_pkey" PRIMARY KEY ("id")
+);
+CREATE INDEX "lab_case_task_status_events_taskId_changedAt_idx"
+  ON "lab_case_task_status_events"("taskId", "changedAt");
+ALTER TABLE "lab_case_task_status_events" ADD CONSTRAINT "lab_case_task_status_events_taskId_fkey"
+  FOREIGN KEY ("taskId") REFERENCES "lab_case_tasks"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "lab_case_task_status_events" ADD CONSTRAINT "lab_case_task_status_events_changedByUserId_fkey"
+  FOREIGN KEY ("changedByUserId") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- 7. Per-case comments.
+CREATE TYPE "LabCaseCommentSide" AS ENUM ('LAB', 'CLINIC');
+CREATE TABLE "lab_case_comments" (
+  "id" TEXT NOT NULL,
+  "labCaseId" TEXT NOT NULL,
+  "authorUserId" TEXT,
+  "authorOrganizationId" TEXT,
+  "authorSide" "LabCaseCommentSide" NOT NULL,
+  "body" TEXT NOT NULL,
+  "visibleToClinic" BOOLEAN NOT NULL DEFAULT false,
+  "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updatedAt" TIMESTAMP(3) NOT NULL,
+  CONSTRAINT "lab_case_comments_pkey" PRIMARY KEY ("id")
+);
+CREATE INDEX "lab_case_comments_labCaseId_createdAt_idx"
+  ON "lab_case_comments"("labCaseId", "createdAt");
+ALTER TABLE "lab_case_comments" ADD CONSTRAINT "lab_case_comments_labCaseId_fkey"
+  FOREIGN KEY ("labCaseId") REFERENCES "lab_cases"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE "lab_case_comments" ADD CONSTRAINT "lab_case_comments_authorUserId_fkey"
+  FOREIGN KEY ("authorUserId") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+ALTER TABLE "lab_case_comments" ADD CONSTRAINT "lab_case_comments_authorOrganizationId_fkey"
+  FOREIGN KEY ("authorOrganizationId") REFERENCES "organizations"("id") ON DELETE SET NULL ON UPDATE CASCADE;
--- a/backend/prisma/regenerate-lab-tasks.ts
+++ b/backend/prisma/regenerate-lab-tasks.ts
@@ -0,0 +1,60 @@
+/**
+ * Dev-only: regenerate lab case tasks from existing LabCaseToothProsthesis rows.
+ * Usage: npx ts-node prisma/regenerate-lab-tasks.ts
+ *
+ * The lab workflow refactor truncated lab_case_tasks. This rebuilds task sets
+ * (grouped by treatment detail + prosthesis type, one set per workflow step)
+ * for every already-sent case that still has prosthesis selections.
+ */
+import { PrismaClient } from '@prisma/client';
+import { config } from 'dotenv';
+import path from 'path';
+import { generateLabCaseTasks } from '../src/modules/cases/lab-case-task.generator';
+
+const envPath = path.join(__dirname, '..', '.env');
+config({ path: envPath });
+
+if (process.env.NODE_ENV === 'production') {
+  console.error('regenerate-lab-tasks is not allowed in production');
+  process.exit(1);
+}
+
+const prisma = new PrismaClient();
+
+async function main() {
+  const cases = await prisma.labCase.findMany({
+    where: {
+      sentAt: { not: null },
+      toothProsthesis: { some: {} },
+    },
+    select: {
+      id: true,
+      treatment: { select: { organization: { select: { owner: { select: { language: true } } } } } },
+    },
+  });
+
+  console.log(`Regenerating tasks for ${cases.length} sent case(s)...`);
+
+  let total = 0;
+  for (const labCase of cases) {
+    const locale = labCase.treatment.organization.owner.language ?? 'en';
+    // Clear any stale tasks first so the generator's "already exists" guard passes.
+    await prisma.labCaseTask.deleteMany({ where: { labCaseId: labCase.id } });
+    const created = await prisma.$transaction((tx) =>
+      generateLabCaseTasks(tx, labCase.id, locale),
+    );
+    total += created;
+    console.log(`  - ${labCase.id}: ${created} task(s)`);
+  }
+
+  console.log(`Done. ${total} task(s) created.`);
+}
+
+main()
+  .catch((e) => {
+    console.error(e);
+    process.exit(1);
+  })
+  .finally(async () => {
+    await prisma.$disconnect();
+  });
--- a/backend/prisma/reset-treatment-data.ts
+++ b/backend/prisma/reset-treatment-data.ts
@@ -21,6 +21,8 @@ const prisma = new PrismaClient();

 // FK-safe order: children before parents.
 const TABLES_IN_ORDER = [
+  'lab_case_task_status_events',
+  'lab_case_comments',
  'lab_case_tasks',
  'lab_case_sends',
  'lab_case_tooth_prosthesis',
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -23,7 +23,9 @@ model User {
  sessions           Session[] // 👈 ADD THIS - opposite relation for Session
  sentStaffInvites   StaffInvitation[]
  sentOrganizationInvitations OrganizationInvitation[]
-  assignedLabCaseTasks LabCaseTask[] @relation("LabCaseTaskAssignee")
+  statusChangedLabCaseTasks LabCaseTask[] @relation("LabCaseTaskLastStatusChangedBy")
+  labCaseTaskStatusEvents LabCaseTaskStatusEvent[]
+  labCaseComments LabCaseComment[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
@@ -65,6 +67,7 @@ model Organization {
  appointments     Appointment[]
  treatments       Treatment[]
  labCaseSends     LabCaseSend[]
+  labCaseComments  LabCaseComment[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
@@ -115,11 +118,15 @@ model Appointment {
 }

 enum LabTaskStatus {
-  PENDING
  IN_PROGRESS
  COMPLETED
 }

+enum LabCaseCommentSide {
+  LAB
+  CLINIC
+}
+
 model Treatment {
  id             String   @id @default(uuid())
  organizationId String
@@ -194,6 +201,7 @@ model LabCase {
  sends           LabCaseSend[]
  tasks           LabCaseTask[]
  toothProsthesis LabCaseToothProsthesis[]
+  comments        LabCaseComment[]

  @@index([treatmentId, sortOrder])
  @@map("lab_cases")
@@ -306,31 +314,66 @@ model LabCaseTask {
  id                 String        @id @default(uuid())
  labCaseId          String
  treatmentDetailId  String
-  tooth              String
+  teeth              Json
  treatmentType      String
  prosthesisTypeCode String
  workflowStepCode   String
  stepOrder          Int
  stepLabel          String
-  assigneeUserId     String?
-  assignedAt         DateTime?
-  priority           Int           @default(3)
-  status             LabTaskStatus @default(PENDING)
+  isImportant        Boolean       @default(false)
+  status             LabTaskStatus @default(IN_PROGRESS)
+  lastStatusChangedByUserId String?
+  lastStatusChangedAt       DateTime?

  labCase  LabCase         @relation(fields: [labCaseId], references: [id], onDelete: Cascade)
  detail   TreatmentDetail @relation(fields: [treatmentDetailId], references: [id], onDelete: Cascade)
-  assignee User?           @relation("LabCaseTaskAssignee", fields: [assigneeUserId], references: [id], onDelete: SetNull)
+  lastStatusChangedBy User? @relation("LabCaseTaskLastStatusChangedBy", fields: [lastStatusChangedByUserId], references: [id], onDelete: SetNull)
+  statusEvents LabCaseTaskStatusEvent[]

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

-  @@unique([labCaseId, treatmentDetailId, tooth, stepOrder])
+  @@unique([labCaseId, treatmentDetailId, prosthesisTypeCode, stepOrder])
  @@index([labCaseId, status])
-  @@index([assigneeUserId, priority, createdAt])
-  @@index([assignedAt, labCaseId, priority])
+  @@index([labCaseId, isImportant])
  @@map("lab_case_tasks")
 }

+model LabCaseTaskStatusEvent {
+  id         String        @id @default(uuid())
+  taskId     String
+  fromStatus LabTaskStatus?
+  toStatus   LabTaskStatus
+  changedByUserId String?
+  changedAt  DateTime      @default(now())
+
+  task LabCaseTask @relation(fields: [taskId], references: [id], onDelete: Cascade)
+  changedBy User?  @relation(fields: [changedByUserId], references: [id], onDelete: SetNull)
+
+  @@index([taskId, changedAt])
+  @@map("lab_case_task_status_events")
+}
+
+model LabCaseComment {
+  id                   String             @id @default(uuid())
+  labCaseId            String
+  authorUserId         String?
+  authorOrganizationId String?
+  authorSide           LabCaseCommentSide
+  body                 String
+  visibleToClinic      Boolean            @default(false)
+
+  labCase      LabCase       @relation(fields: [labCaseId], references: [id], onDelete: Cascade)
+  authorUser   User?         @relation(fields: [authorUserId], references: [id], onDelete: SetNull)
+  authorOrganization Organization? @relation(fields: [authorOrganizationId], references: [id], onDelete: SetNull)
+
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+
+  @@index([labCaseId, createdAt])
+  @@map("lab_case_comments")
+}
+
 model Plan {
  id       String @id @default(uuid())
  name     String @unique // "Solo", "Small", "Medium", "Large", "Enterprise"
--- a/backend/src/app.module.ts
+++ b/backend/src/app.module.ts
@@ -16,6 +16,7 @@ import { TasksModule } from './modules/tasks/tasks.module';
 import { TreatmentCatalogModule } from './modules/treatment-catalog/treatment-catalog.module';
 import { CatalogModule } from './modules/catalog/catalog.module';
 import { ProsthesisCatalogModule } from './modules/prosthesis-catalog/prosthesis-catalog.module';
+import { LabCaseCommentsModule } from './modules/lab-case-comments/lab-case-comments.module';

@Module({
  imports: [
@@ -33,6 +34,7 @@ import { ProsthesisCatalogModule } from './modules/prosthesis-catalog/prosthesis
    TreatmentsModule,
    CasesModule,
    TasksModule,
+    LabCaseCommentsModule,
    StaffModule,
    OrganizationModule,
    AdminModule.forRoot(),
--- a/backend/src/modules/cases/cases.controller.ts
+++ b/backend/src/modules/cases/cases.controller.ts
@@ -35,13 +35,6 @@ export class CasesController {
    return this.casesService.listFilterOptions(organizationId, req.user.id);
  }

-  @Get('assignable-members')
-  @ApiOperation({ summary: 'List lab staff who can be assigned to tasks' })
-  listAssignableMembers(@Req() req) {
-    const organizationId = this.casesService.getOrganizationIdFromUser(req.user);
-    return this.casesService.listAssignableMembers(organizationId, req.user.id);
-  }
-
  @Get(':id')
  @ApiOperation({ summary: 'Get one lab case with tasks grouped by tooth' })
  getOne(@Param('id') id: string, @Req() req) {
@@ -50,7 +43,7 @@ export class CasesController {
  }

  @Patch(':id/tasks/:taskId')
-  @ApiOperation({ summary: 'Update task assignee or priority' })
+  @ApiOperation({ summary: 'Toggle task important flag' })
  updateTask(
    @Param('id') id: string,
    @Param('taskId') taskId: string,
--- a/backend/src/modules/cases/cases.service.ts
+++ b/backend/src/modules/cases/cases.service.ts
@@ -14,6 +14,7 @@ import {
 import { TreatmentCatalogService } from '../treatment-catalog/treatment-catalog.service';
 import { normalizeTeeth } from '../treatments/treatment.utils';
 import { ListLabCasesDto, UpdateLabCaseTaskDto } from './dto/cases.dto';
+import { normalizeTaskTeeth } from './lab-case-task.util';

 const labCaseListInclude = {
  treatment: {
@@ -41,16 +42,29 @@ const labCaseListInclude = {
  },
  tasks: {
    orderBy: [
-      { tooth: 'asc' as const },
-      { treatmentType: 'asc' as const },
+      { treatmentDetailId: 'asc' as const },
+      { prosthesisTypeCode: 'asc' as const },
      { stepOrder: 'asc' as const },
    ],
    include: {
-      assignee: { select: { id: true, name: true, email: true } },
+      lastStatusChangedBy: { select: { id: true, name: true } },
+      statusEvents: {
+        orderBy: { changedAt: 'asc' as const },
+        include: { changedBy: { select: { id: true, name: true } } },
+      },
    },
  },
 } satisfies Prisma.LabCaseInclude;

+type LabCaseTaskWithRelations = Prisma.LabCaseTaskGetPayload<{
+  include: {
+    lastStatusChangedBy: { select: { id: true; name: true } };
+    statusEvents: {
+      include: { changedBy: { select: { id: true; name: true } } };
+    };
+  };
+}>;
+
@Injectable()
 export class CasesService {
  constructor(
@@ -294,23 +308,15 @@ export class CasesService {
      throw new NotFoundException('Task not found');
    }

-    if (dto.assigneeUserId !== undefined && dto.assigneeUserId !== null) {
-      await this.ensureAssignableMember(dto.assigneeUserId, labOrganizationId);
-    }
-
    const updated = await this.prisma.labCaseTask.update({
      where: { id: taskId },
-      data: {
-        ...(dto.assigneeUserId !== undefined
-          ? {
-              assigneeUserId: dto.assigneeUserId,
-              assignedAt: dto.assigneeUserId === null ? null : new Date(),
-            }
-          : {}),
-        ...(dto.priority !== undefined ? { priority: dto.priority } : {}),
-      },
+      data: { isImportant: dto.isImportant },
      include: {
-        assignee: { select: { id: true, name: true, email: true } },
+        lastStatusChangedBy: { select: { id: true, name: true } },
+        statusEvents: {
+          orderBy: { changedAt: 'asc' },
+          include: { changedBy: { select: { id: true, name: true } } },
+        },
      },
    });

@@ -324,35 +330,6 @@ export class CasesService {
    return { success: true, data: this.mapTask(updated, prosthesisLabels) };
  }

-  async listAssignableMembers(labOrganizationId: string, actorUserId: string) {
-    await this.assertCanReadCases(actorUserId, labOrganizationId);
-
-    const memberships = await this.prisma.membership.findMany({
-      where: { organizationId: labOrganizationId, isActive: true },
-      include: {
-        user: { select: { id: true, name: true, email: true } },
-        permissions: { include: { permission: true } },
-      },
-      orderBy: [{ isOwner: 'desc' }, { createdAt: 'asc' }],
-    });
-
-    return {
-      success: true,
-      data: memberships
-        .filter((m) => {
-          if (m.isOwner) return true;
-          const names = m.permissions.map((p) => p.permission.name);
-          return names.includes('TAB_TASKS_READ') || names.includes('TAB_TASKS_EDIT');
-        })
-        .map((m) => ({
-          userId: m.user.id,
-          name: m.user.name,
-          email: m.user.email,
-          isOwner: m.isOwner,
-        })),
-    };
-  }
-
  private buildListWhere(
    labOrganizationId: string,
    query: ListLabCasesDto,
@@ -465,7 +442,7 @@ export class CasesService {
      prosthesisCodes,
      locale,
    );
-    const tasksByTooth = this.groupTasksByTooth(lc.tasks, prosthesisLabels);
+    const tasksByTooth = this.groupTasks(lc.tasks, prosthesisLabels);

    return {
      id: lc.id,
@@ -495,27 +472,15 @@ export class CasesService {
    };
  }

-  private groupTasksByTooth(
-    tasks: Array<{
-      id: string;
-      tooth: string;
-      treatmentType: string;
-      prosthesisTypeCode: string;
-      stepOrder: number;
-      stepLabel: string;
-      status: LabTaskStatus;
-      priority: number;
-      assigneeUserId: string | null;
-      assignedAt: Date | null;
-      createdAt: Date;
-      assignee: { id: string; name: string; email: string } | null;
-    }>,
+  private groupTasks(
+    tasks: LabCaseTaskWithRelations[],
    prosthesisLabels: Map<string, string>,
  ) {
    const groups = new Map<
      string,
      {
-        tooth: string;
+        treatmentDetailId: string;
+        teeth: string[];
        treatmentType: string;
        prosthesisTypeCode: string;
        prosthesisTypeLabel: string;
@@ -524,9 +489,10 @@ export class CasesService {
    >();

    for (const task of tasks) {
-      const key = `${task.tooth}:${task.treatmentType}:${task.prosthesisTypeCode}`;
+      const key = `${task.treatmentDetailId}:${task.prosthesisTypeCode}`;
      const entry = groups.get(key) ?? {
-        tooth: task.tooth,
+        treatmentDetailId: task.treatmentDetailId,
+        teeth: normalizeTaskTeeth(task.teeth),
        treatmentType: task.treatmentType,
        prosthesisTypeCode: task.prosthesisTypeCode,
        prosthesisTypeLabel:
@@ -541,26 +507,13 @@ export class CasesService {
  }

  private mapTask(
-    task: {
-      id: string;
-      tooth: string;
-      treatmentType: string;
-      prosthesisTypeCode: string;
-      workflowStepCode?: string;
-      stepOrder: number;
-      stepLabel: string;
-      status: LabTaskStatus;
-      priority: number;
-      assigneeUserId: string | null;
-      assignedAt: Date | null;
-      createdAt: Date;
-      assignee: { id: string; name: string; email: string } | null;
-    },
+    task: LabCaseTaskWithRelations,
    prosthesisLabels: Map<string, string>,
  ) {
    return {
      id: task.id,
-      tooth: task.tooth,
+      treatmentDetailId: task.treatmentDetailId,
+      teeth: normalizeTaskTeeth(task.teeth),
      treatmentType: task.treatmentType,
      prosthesisTypeCode: task.prosthesisTypeCode,
      prosthesisTypeLabel:
@@ -569,32 +522,24 @@ export class CasesService {
      stepOrder: task.stepOrder,
      stepLabel: task.stepLabel,
      status: task.status,
-      priority: task.priority,
-      assignedAt: task.assignedAt?.toISOString() ?? null,
+      isImportant: task.isImportant,
      createdAt: task.createdAt.toISOString(),
-      assigneeUserId: task.assigneeUserId,
-      assignee: task.assignee
-        ? { id: task.assignee.id, name: task.assignee.name, email: task.assignee.email }
+      lastStatusChangedAt: task.lastStatusChangedAt?.toISOString() ?? null,
+      lastStatusChangedBy: task.lastStatusChangedBy
+        ? { id: task.lastStatusChangedBy.id, name: task.lastStatusChangedBy.name }
        : null,
+      timeline: task.statusEvents.map((event) => ({
+        id: event.id,
+        fromStatus: event.fromStatus,
+        toStatus: event.toStatus,
+        changedAt: event.changedAt.toISOString(),
+        changedBy: event.changedBy
+          ? { id: event.changedBy.id, name: event.changedBy.name }
+          : null,
+      })),
    };
  }

-  private async ensureAssignableMember(userId: string, labOrganizationId: string) {
-    const membership = await this.prisma.membership.findFirst({
-      where: { userId, organizationId: labOrganizationId, isActive: true },
-      include: { permissions: { include: { permission: true } } },
-    });
-    if (!membership) {
-      throw new BadRequestException('Assignee must be an active member of this lab');
-    }
-    if (membership.isOwner) return;
-    const names = membership.permissions.map((p) => p.permission.name);
-    if (names.includes('TAB_TASKS_READ') || names.includes('TAB_TASKS_EDIT')) {
-      return;
-    }
-    throw new BadRequestException('Assignee must have access to the Tasks tab');
-  }
-
  private async assertCanReadCases(userId: string, organizationId: string) {
    const m = await this.getMembership(userId, organizationId);
    if (!m) {
--- a/backend/src/modules/cases/dto/cases.dto.ts
+++ b/backend/src/modules/cases/dto/cases.dto.ts
@@ -1,18 +1,9 @@
 import { Transform } from 'class-transformer';
-import { IsDateString, IsInt, IsOptional, IsString, IsUUID, Max, Min, ValidateIf } from 'class-validator';
+import { IsBoolean, IsDateString, IsInt, IsOptional, IsString, IsUUID, Max, Min } from 'class-validator';

 export class UpdateLabCaseTaskDto {
-  @IsOptional()
-  @ValidateIf((_, value) => value !== null)
-  @IsUUID()
-  assigneeUserId?: string | null;
-
-  @IsOptional()
-  @Transform(({ value }) => Number(value))
-  @IsInt()
-  @Min(1)
-  @Max(5)
-  priority?: number;
+  @IsBoolean()
+  isImportant: boolean;
 }

 export class ListLabCasesDto {
--- a/backend/src/modules/cases/lab-case-task.generator.spec.ts
+++ b/backend/src/modules/cases/lab-case-task.generator.spec.ts
@@ -101,10 +101,11 @@ describe('generateLabCaseTasks', () => {
    expect(count).toBe(pfmSteps.length);
    expect(created).toHaveLength(pfmSteps.length);
    expect(created[0]).toMatchObject({
-      tooth: '14',
+      teeth: ['14'],
      prosthesisTypeCode: 'pfm_crown',
      workflowStepCode: 'intraoral_scan',
      stepLabel: 'Intraoral Scan',
+      status: 'IN_PROGRESS',
    });
    const stepCodes = (created as Array<{ workflowStepCode: string }>).map(
      (row) => row.workflowStepCode,
@@ -115,6 +116,35 @@ describe('generateLabCaseTasks', () => {
    expect(stepCodes).toContain('milling_wet');
  });

+  it('groups teeth sharing a prosthesis in one detail, and keeps other prosthesis separate', async () => {
+    const pfmSteps = stepsFromSeed('pfm_crown');
+    const zirconiaSteps = stepsFromSeed('monolithic_zirconia');
+    const { tx, created } = buildMockTx({
+      toothProsthesisRows: [
+        { treatmentDetailId: 'detail-1', tooth: '15', prosthesisTypeCode: 'pfm_crown' },
+        { treatmentDetailId: 'detail-1', tooth: '14', prosthesisTypeCode: 'pfm_crown' },
+        { treatmentDetailId: 'detail-1', tooth: '16', prosthesisTypeCode: 'monolithic_zirconia' },
+      ],
+      prosthesisTypes: [
+        { code: 'pfm_crown', steps: pfmSteps },
+        { code: 'monolithic_zirconia', steps: zirconiaSteps },
+      ],
+    });
+
+    const count = await generateLabCaseTasks(tx as never, 'lab-case-group', 'en');
+
+    expect(count).toBe(pfmSteps.length + zirconiaSteps.length);
+    const rows = created as Array<{ teeth: string[]; prosthesisTypeCode: string }>;
+    const pfmRows = rows.filter((r) => r.prosthesisTypeCode === 'pfm_crown');
+    const zirconiaRows = rows.filter((r) => r.prosthesisTypeCode === 'monolithic_zirconia');
+
+    expect(pfmRows).toHaveLength(pfmSteps.length);
+    expect(zirconiaRows).toHaveLength(zirconiaSteps.length);
+    // Teeth sharing the prosthesis in the same detail are merged and sorted.
+    expect(pfmRows.every((r) => JSON.stringify(r.teeth) === JSON.stringify(['14', '15']))).toBe(true);
+    expect(zirconiaRows.every((r) => JSON.stringify(r.teeth) === JSON.stringify(['16']))).toBe(true);
+  });
+
  it('omits packing and shipping for smile_design', async () => {
    const smileSteps = stepsFromSeed('smile_design');
    const { tx, created } = buildMockTx({
--- a/backend/src/modules/cases/lab-case-task.generator.ts
+++ b/backend/src/modules/cases/lab-case-task.generator.ts
@@ -58,25 +58,46 @@ export async function generateLabCaseTasks(

  const stepLabels = await resolveStepLabels(tx, allStepCodes, locale);

-  const taskRows: Prisma.LabCaseTaskCreateManyInput[] = [];
+  // Group teeth that share the same (treatment detail + prosthesis type): one task set
+  // per group, with each step covering every tooth in that group.
+  const groups = new Map<
+    string,
+    { treatmentDetailId: string; treatmentType: string; prosthesisTypeCode: string; teeth: string[] }
+  >();

  for (const row of toothProsthesisRows) {
-    const typeSteps = stepsByProsthesisCode.get(row.prosthesisTypeCode) ?? [];
+    const key = `${row.treatmentDetailId}::${row.prosthesisTypeCode}`;
+    const group = groups.get(key) ?? {
+      treatmentDetailId: row.treatmentDetailId,
+      treatmentType: row.detail.treatmentType,
+      prosthesisTypeCode: row.prosthesisTypeCode,
+      teeth: [],
+    };
+    group.teeth.push(row.tooth);
+    groups.set(key, group);
+  }
+
+  const taskRows: Prisma.LabCaseTaskCreateManyInput[] = [];
+
+  for (const group of groups.values()) {
+    const typeSteps = stepsByProsthesisCode.get(group.prosthesisTypeCode) ?? [];
    if (typeSteps.length === 0) {
      continue;
    }

+    const teeth = sortTeeth(group.teeth);
+
    for (const step of typeSteps) {
      taskRows.push({
        labCaseId,
-        treatmentDetailId: row.treatmentDetailId,
-        tooth: row.tooth,
-        treatmentType: row.detail.treatmentType,
-        prosthesisTypeCode: row.prosthesisTypeCode,
+        treatmentDetailId: group.treatmentDetailId,
+        teeth,
+        treatmentType: group.treatmentType,
+        prosthesisTypeCode: group.prosthesisTypeCode,
        workflowStepCode: step.workflowStepCode,
        stepOrder: step.stepOrder,
        stepLabel: stepLabels.get(step.workflowStepCode) ?? step.workflowStepCode,
-        status: LabTaskStatus.PENDING,
+        status: LabTaskStatus.IN_PROGRESS,
      });
    }
  }
@@ -89,6 +110,15 @@ export async function generateLabCaseTasks(
  return taskRows.length;
 }

+function sortTeeth(teeth: string[]): string[] {
+  return [...new Set(teeth)].sort((a, b) => {
+    const na = Number(a);
+    const nb = Number(b);
+    if (!Number.isNaN(na) && !Number.isNaN(nb)) return na - nb;
+    return a.localeCompare(b);
+  });
+}
+
 async function resolveStepLabels(
  tx: TransactionClient,
  stepCodes: string[],
--- a/backend/src/modules/cases/lab-case-task.util.ts
+++ b/backend/src/modules/cases/lab-case-task.util.ts
@@ -0,0 +1,11 @@
+import { Prisma } from '@prisma/client';
+
+/** Normalize the JSON `teeth` column of a lab case task into a clean string[]. */
+export function normalizeTaskTeeth(value: Prisma.JsonValue | null | undefined): string[] {
+  if (!Array.isArray(value)) {
+    return [];
+  }
+  return value
+    .filter((v): v is string | number => typeof v === 'string' || typeof v === 'number')
+    .map((v) => String(v));
+}
--- a/backend/src/modules/lab-case-comments/dto/lab-case-comment.dto.ts
+++ b/backend/src/modules/lab-case-comments/dto/lab-case-comment.dto.ts
@@ -0,0 +1,17 @@
+import { IsBoolean, IsOptional, IsString, MaxLength, MinLength } from 'class-validator';
+
+export class CreateLabCaseCommentDto {
+  @IsString()
+  @MinLength(1)
+  @MaxLength(2000)
+  body: string;
+
+  @IsOptional()
+  @IsBoolean()
+  visibleToClinic?: boolean;
+}
+
+export class SetCommentVisibilityDto {
+  @IsBoolean()
+  visibleToClinic: boolean;
+}
--- a/backend/src/modules/lab-case-comments/lab-case-comments.controller.ts
+++ b/backend/src/modules/lab-case-comments/lab-case-comments.controller.ts
@@ -0,0 +1,61 @@
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Req,
+  UseGuards,
+} from '@nestjs/common';
+import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
+import { LabOrgGuard } from '../../common/guards/lab-org.guard';
+import { JwtAuthGuard } from '../auth/guards/jwt-auth.guard';
+import {
+  CreateLabCaseCommentDto,
+  SetCommentVisibilityDto,
+} from './dto/lab-case-comment.dto';
+import { LabCaseCommentsService } from './lab-case-comments.service';
+
+@ApiTags('case-comments')
+@ApiBearerAuth('JWT-auth')
+@UseGuards(JwtAuthGuard, LabOrgGuard)
+@Controller('case-comments')
+export class LabCaseCommentsController {
+  constructor(private readonly service: LabCaseCommentsService) {}
+
+  private orgId(req: { user: { organizationId?: string } }) {
+    return req.user.organizationId as string;
+  }
+
+  @Get(':caseId')
+  @ApiOperation({ summary: 'List comments for a lab case (lab side)' })
+  list(@Param('caseId') caseId: string, @Req() req) {
+    return this.service.listForLab(caseId, this.orgId(req), req.user.id);
+  }
+
+  @Post(':caseId')
+  @ApiOperation({ summary: 'Add a comment to a lab case (lab side)' })
+  add(
+    @Param('caseId') caseId: string,
+    @Body() dto: CreateLabCaseCommentDto,
+    @Req() req,
+  ) {
+    return this.service.addForLab(caseId, this.orgId(req), req.user.id, dto);
+  }
+
+  @Patch('item/:commentId/visibility')
+  @ApiOperation({ summary: 'Toggle whether a comment is visible to the clinic' })
+  setVisibility(
+    @Param('commentId') commentId: string,
+    @Body() dto: SetCommentVisibilityDto,
+    @Req() req,
+  ) {
+    return this.service.setVisibility(
+      commentId,
+      this.orgId(req),
+      req.user.id,
+      dto.visibleToClinic,
+    );
+  }
+}
--- a/backend/src/modules/lab-case-comments/lab-case-comments.module.ts
+++ b/backend/src/modules/lab-case-comments/lab-case-comments.module.ts
@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { PrismaService } from '../../../prisma/prisma.service';
+import { LabOrgGuard } from '../../common/guards/lab-org.guard';
+import { LabCaseCommentsController } from './lab-case-comments.controller';
+import { LabCaseCommentsService } from './lab-case-comments.service';
+
+@Module({
+  controllers: [LabCaseCommentsController],
+  providers: [LabCaseCommentsService, PrismaService, LabOrgGuard],
+  exports: [LabCaseCommentsService],
+})
+export class LabCaseCommentsModule {}
--- a/backend/src/modules/lab-case-comments/lab-case-comments.service.ts
+++ b/backend/src/modules/lab-case-comments/lab-case-comments.service.ts
@@ -0,0 +1,183 @@
+import {
+  ForbiddenException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
+import { LabCaseCommentSide, Prisma } from '@prisma/client';
+import { PrismaService } from '../../../prisma/prisma.service';
+import { CreateLabCaseCommentDto } from './dto/lab-case-comment.dto';
+
+const commentInclude = {
+  authorUser: { select: { id: true, name: true } },
+  authorOrganization: { select: { id: true, name: true } },
+} satisfies Prisma.LabCaseCommentInclude;
+
+type CommentWithRelations = Prisma.LabCaseCommentGetPayload<{
+  include: typeof commentInclude;
+}>;
+
+@Injectable()
+export class LabCaseCommentsService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  // ---------- Lab side (TAB_TASKS_EDIT) ----------
+
+  async listForLab(caseId: string, labOrganizationId: string, actorUserId: string) {
+    await this.assertLabCanComment(caseId, labOrganizationId, actorUserId);
+    const comments = await this.fetchComments(caseId);
+    return { success: true, data: comments.map((c) => this.mapComment(c, LabCaseCommentSide.LAB)) };
+  }
+
+  async addForLab(
+    caseId: string,
+    labOrganizationId: string,
+    actorUserId: string,
+    dto: CreateLabCaseCommentDto,
+  ) {
+    await this.assertLabCanComment(caseId, labOrganizationId, actorUserId);
+    const created = await this.prisma.labCaseComment.create({
+      data: {
+        labCaseId: caseId,
+        authorUserId: actorUserId,
+        authorOrganizationId: labOrganizationId,
+        authorSide: LabCaseCommentSide.LAB,
+        body: dto.body.trim(),
+        visibleToClinic: dto.visibleToClinic ?? false,
+      },
+      include: commentInclude,
+    });
+    return { success: true, data: this.mapComment(created, LabCaseCommentSide.LAB) };
+  }
+
+  async setVisibility(
+    commentId: string,
+    labOrganizationId: string,
+    actorUserId: string,
+    visibleToClinic: boolean,
+  ) {
+    const comment = await this.prisma.labCaseComment.findUnique({
+      where: { id: commentId },
+      select: { id: true, labCaseId: true, authorSide: true },
+    });
+    if (!comment) {
+      throw new NotFoundException('Comment not found');
+    }
+    await this.assertLabCanComment(comment.labCaseId, labOrganizationId, actorUserId);
+    if (comment.authorSide !== LabCaseCommentSide.LAB) {
+      throw new ForbiddenException('Only lab comments can change visibility');
+    }
+    const updated = await this.prisma.labCaseComment.update({
+      where: { id: commentId },
+      data: { visibleToClinic },
+      include: commentInclude,
+    });
+    return { success: true, data: this.mapComment(updated, LabCaseCommentSide.LAB) };
+  }
+
+  // ---------- Clinic side (connection access is validated by caller) ----------
+
+  async listForClinic(caseId: string, clinicOrganizationId: string) {
+    await this.assertClinicOwnsCase(caseId, clinicOrganizationId);
+    const comments = await this.fetchComments(caseId, { visibleOnly: true });
+    return {
+      success: true,
+      data: comments.map((c) => this.mapComment(c, LabCaseCommentSide.CLINIC)),
+    };
+  }
+
+  async addForClinic(
+    caseId: string,
+    clinicOrganizationId: string,
+    actorUserId: string,
+    dto: CreateLabCaseCommentDto,
+  ) {
+    await this.assertClinicOwnsCase(caseId, clinicOrganizationId);
+    const created = await this.prisma.labCaseComment.create({
+      data: {
+        labCaseId: caseId,
+        authorUserId: actorUserId,
+        authorOrganizationId: clinicOrganizationId,
+        authorSide: LabCaseCommentSide.CLINIC,
+        body: dto.body.trim(),
+        // Clinic-authored comments are inherently visible to the clinic.
+        visibleToClinic: true,
+      },
+      include: commentInclude,
+    });
+    return { success: true, data: this.mapComment(created, LabCaseCommentSide.CLINIC) };
+  }
+
+  // ---------- Helpers ----------
+
+  private fetchComments(caseId: string, opts?: { visibleOnly?: boolean }) {
+    return this.prisma.labCaseComment.findMany({
+      where: {
+        labCaseId: caseId,
+        ...(opts?.visibleOnly ? { visibleToClinic: true } : {}),
+      },
+      include: commentInclude,
+      orderBy: { createdAt: 'asc' },
+    });
+  }
+
+  private mapComment(comment: CommentWithRelations, viewerSide: LabCaseCommentSide) {
+    return {
+      id: comment.id,
+      body: comment.body,
+      authorSide: comment.authorSide,
+      authorName: comment.authorUser?.name ?? null,
+      authorOrganizationName: comment.authorOrganization?.name ?? null,
+      visibleToClinic: comment.visibleToClinic,
+      createdAt: comment.createdAt.toISOString(),
+      // Only lab viewers can toggle visibility, and only on lab-authored comments.
+      canToggleVisibility:
+        viewerSide === LabCaseCommentSide.LAB &&
+        comment.authorSide === LabCaseCommentSide.LAB,
+    };
+  }
+
+  private async assertLabCanComment(
+    caseId: string,
+    labOrganizationId: string,
+    actorUserId: string,
+  ) {
+    const labCase = await this.prisma.labCase.findFirst({
+      where: {
+        id: caseId,
+        sentAt: { not: null },
+        sends: { some: { organizationId: labOrganizationId } },
+      },
+      select: { id: true },
+    });
+    if (!labCase) {
+      throw new NotFoundException('Case not found');
+    }
+
+    const membership = await this.prisma.membership.findFirst({
+      where: { userId: actorUserId, organizationId: labOrganizationId, isActive: true },
+      include: { permissions: { include: { permission: true } } },
+    });
+    if (!membership) {
+      throw new ForbiddenException('You are not a member of this organization');
+    }
+    if (membership.isOwner) return;
+    const names = membership.permissions.map((p) => p.permission.name);
+    if (!names.includes('TAB_TASKS_EDIT')) {
+      throw new ForbiddenException('You do not have access to task comments');
+    }
+  }
+
+  private async assertClinicOwnsCase(caseId: string, clinicOrganizationId: string) {
+    const labCase = await this.prisma.labCase.findFirst({
+      where: {
+        id: caseId,
+        sentAt: { not: null },
+        treatment: { organizationId: clinicOrganizationId },
+      },
+      select: { id: true },
+    });
+    if (!labCase) {
+      throw new NotFoundException('Case not found');
+    }
+  }
+}
--- a/backend/src/modules/organization/organization.controller.ts
+++ b/backend/src/modules/organization/organization.controller.ts
@@ -19,6 +19,7 @@ import { PreviewOrganizationInviteDto } from './dto/preview-organization-invite.
 import { RespondConnectionRequestDto } from './dto/respond-connection-request.dto';
 import { OrganizationService } from './organization.service';
 import { ListLabCasesDto } from '../cases/dto/cases.dto';
+import { CreateLabCaseCommentDto } from '../lab-case-comments/dto/lab-case-comment.dto';

 /**
 * Counterpart orgs (clinic↔lab).
@@ -157,6 +158,42 @@ export class OrganizationController {
    );
  }

+  @Get('connections/:connectionId/cases/:caseId/comments')
+  @UseGuards(JwtAuthGuard)
+  @ApiOperation({ summary: 'List clinic-visible comments for a connection case' })
+  listConnectionCaseComments(
+    @Req() req: { user: { id: string; organizationId?: string } },
+    @Param('connectionId') connectionId: string,
+    @Param('caseId') caseId: string,
+  ) {
+    const organizationId = this.organizationService.getOrganizationIdFromUser(req.user);
+    return this.organizationService.listConnectionCaseComments(
+      req.user.id,
+      organizationId,
+      connectionId,
+      caseId,
+    );
+  }
+
+  @Post('connections/:connectionId/cases/:caseId/comments')
+  @UseGuards(JwtAuthGuard)
+  @ApiOperation({ summary: 'Reply to a connection case as the clinic' })
+  addConnectionCaseComment(
+    @Req() req: { user: { id: string; organizationId?: string } },
+    @Param('connectionId') connectionId: string,
+    @Param('caseId') caseId: string,
+    @Body() dto: CreateLabCaseCommentDto,
+  ) {
+    const organizationId = this.organizationService.getOrganizationIdFromUser(req.user);
+    return this.organizationService.addConnectionCaseComment(
+      req.user.id,
+      organizationId,
+      connectionId,
+      caseId,
+      dto,
+    );
+  }
+
  @Post('invitations/:invitationId/link')
  @UseGuards(JwtAuthGuard)
  @ApiOperation({ summary: 'Get a shareable invite link for a pending invitation' })
--- a/backend/src/modules/organization/organization.module.ts
+++ b/backend/src/modules/organization/organization.module.ts
@@ -1,11 +1,12 @@
 import { Module } from '@nestjs/common';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { CasesModule } from '../cases/cases.module';
+import { LabCaseCommentsModule } from '../lab-case-comments/lab-case-comments.module';
 import { OrganizationController } from './organization.controller';
 import { OrganizationService } from './organization.service';

@Module({
-  imports: [CasesModule],
+  imports: [CasesModule, LabCaseCommentsModule],
  controllers: [OrganizationController],
  providers: [OrganizationService, PrismaService],
 })
--- a/backend/src/modules/organization/organization.service.ts
+++ b/backend/src/modules/organization/organization.service.ts
@@ -11,6 +11,8 @@ import { createHash, randomBytes } from 'crypto';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { ListLabCasesDto } from '../cases/dto/cases.dto';
 import { CasesService } from '../cases/cases.service';
+import { LabCaseCommentsService } from '../lab-case-comments/lab-case-comments.service';
+import { CreateLabCaseCommentDto } from '../lab-case-comments/dto/lab-case-comment.dto';
 import { AcceptOrganizationInviteDto } from './dto/accept-organization-invite.dto';
 import { CreateConnectionRequestDto } from './dto/create-connection-request.dto';
 import { InviteOrganizationDto } from './dto/invite-organization.dto';
@@ -33,6 +35,7 @@ export class OrganizationService {
  constructor(
    private readonly prisma: PrismaService,
    private readonly casesService: CasesService,
+    private readonly commentsService: LabCaseCommentsService,
  ) {}

  getOrganizationIdFromUser(user: { organizationId?: string }) {
@@ -405,6 +408,55 @@ export class OrganizationService {
    };
  }

+  async listConnectionCaseComments(
+    userId: string,
+    organizationId: string,
+    connectionId: string,
+    caseId: string,
+  ) {
+    const { clinicOrganizationId } = await this.resolveClinicConnection(
+      userId,
+      organizationId,
+      connectionId,
+    );
+    return this.commentsService.listForClinic(caseId, clinicOrganizationId);
+  }
+
+  async addConnectionCaseComment(
+    userId: string,
+    organizationId: string,
+    connectionId: string,
+    caseId: string,
+    dto: CreateLabCaseCommentDto,
+  ) {
+    const { clinicOrganizationId } = await this.resolveClinicConnection(
+      userId,
+      organizationId,
+      connectionId,
+    );
+    return this.commentsService.addForClinic(caseId, clinicOrganizationId, userId, dto);
+  }
+
+  /**
+   * Clinic comment surfaces require the actor to belong to the clinic side of the connection.
+   * Only clinic-side members may read/reply to case comments from the connection history.
+   */
+  private async resolveClinicConnection(
+    userId: string,
+    organizationId: string,
+    connectionId: string,
+  ) {
+    const actor = await this.getActorMembership(userId, organizationId);
+    if (!actor || !this.canEditOrganizations(actor)) {
+      throw new ForbiddenException('You do not have permission to manage organizations');
+    }
+    const parties = await this.resolveActiveConnectionParties(connectionId, organizationId, actor);
+    if (parties.clinicOrganizationId !== organizationId) {
+      throw new ForbiddenException('Only the clinic can comment on this case');
+    }
+    return parties;
+  }
+
  /** Re-issue a shareable URL for a pending invitation (rotates token; previous URL stops working). */
  async getInvitationLink(userId: string, organizationId: string, invitationId: string) {
    const actor = await this.getActorMembership(userId, organizationId);
--- a/backend/src/modules/tasks/dto/tasks.dto.ts
+++ b/backend/src/modules/tasks/dto/tasks.dto.ts
@@ -1,13 +1,71 @@
-import { IsEnum, IsInt, IsOptional, Max, Min } from 'class-validator';
+import {
+  IsBoolean,
+  IsDateString,
+  IsEnum,
+  IsIn,
+  IsInt,
+  IsOptional,
+  IsString,
+  IsUUID,
+  Max,
+  Min,
+} from 'class-validator';
 import { Transform } from 'class-transformer';
 import { LabTaskStatus } from '@prisma/client';

+const toBoolean = ({ value }: { value: unknown }) => {
+  if (typeof value === 'boolean') return value;
+  if (value === 'true' || value === '1') return true;
+  if (value === 'false' || value === '0') return false;
+  return value;
+};
+
 export class UpdateLabTaskDto {
  @IsEnum(LabTaskStatus)
  status: LabTaskStatus;
 }

+export type TaskSortField = 'date' | 'status' | 'clinic' | 'patient' | 'important';
+
 export class ListLabTasksDto {
+  @IsOptional()
+  @IsString()
+  q?: string;
+
+  @IsOptional()
+  @IsUUID()
+  clinicOrganizationId?: string;
+
+  @IsOptional()
+  @IsEnum(LabTaskStatus)
+  status?: LabTaskStatus;
+
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  completed?: boolean;
+
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  important?: boolean;
+
+  @IsOptional()
+  @IsDateString()
+  sentFrom?: string;
+
+  @IsOptional()
+  @IsDateString()
+  sentTo?: string;
+
+  @IsOptional()
+  @IsIn(['date', 'status', 'clinic', 'patient', 'important'])
+  sortBy?: TaskSortField;
+
+  @IsOptional()
+  @IsIn(['asc', 'desc'])
+  sortDir?: 'asc' | 'desc';
+
  @IsOptional()
  @Transform(({ value }) => Number(value))
  @IsInt()
--- a/backend/src/modules/tasks/tasks.controller.ts
+++ b/backend/src/modules/tasks/tasks.controller.ts
@@ -13,7 +13,7 @@ export class TasksController {
  constructor(private readonly tasksService: TasksService) {}

  @Get()
-  @ApiOperation({ summary: 'List lab tasks (owner: all, staff: assigned only)' })
+  @ApiOperation({ summary: 'List lab tasks' })
  list(@Query() query: ListLabTasksDto, @Req() req) {
    const organizationId = this.tasksService.getOrganizationIdFromUser(req.user);
    return this.tasksService.list(organizationId, req.user.id, query, req.user.language);
--- a/backend/src/modules/tasks/tasks.service.ts
+++ b/backend/src/modules/tasks/tasks.service.ts
@@ -6,14 +6,16 @@ import {
 } from '@nestjs/common';
 import { CatalogEntityKind, LabTaskStatus, Prisma } from '@prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
+import { normalizeMobile } from '../../common/phone';
 import {
  CatalogLabelService,
  normalizeCatalogLocale,
 } from '../catalog/catalog-label.service';
+import { normalizeTaskTeeth } from '../cases/lab-case-task.util';
 import { ListLabTasksDto, UpdateLabTaskDto } from './dto/tasks.dto';

 const taskListInclude = {
-  assignee: { select: { id: true, name: true, email: true } },
+  lastStatusChangedBy: { select: { id: true, name: true } },
  labCase: {
    include: {
      treatment: {
@@ -48,35 +50,17 @@ export class TasksService {
  ) {
    await this.assertCanReadTasks(actorUserId, labOrganizationId);

-    const membership = await this.getMembership(actorUserId, labOrganizationId);
-    if (!membership) {
-      throw new ForbiddenException('You are not a member of this organization');
-    }
-
    const page = query.page ?? 1;
    const limit = Math.min(Math.max(query.limit ?? 50, 1), 100);
    const skip = (page - 1) * limit;

-    const where: Prisma.LabCaseTaskWhereInput = {
-      labCase: {
-        sentAt: { not: null },
-        sends: { some: { organizationId: labOrganizationId } },
-      },
-      ...(membership.isOwner ? {} : { assigneeUserId: actorUserId }),
-    };
+    const where = this.buildListWhere(labOrganizationId, query);

    const [items, total] = await Promise.all([
      this.prisma.labCaseTask.findMany({
        where,
        include: taskListInclude,
-        orderBy: [
-          { assignedAt: { sort: 'desc', nulls: 'first' } },
-          { createdAt: 'desc' },
-          { labCaseId: 'asc' },
-          { priority: 'desc' },
-          { stepOrder: 'asc' },
-          { id: 'asc' },
-        ],
+        orderBy: this.buildOrderBy(query),
        skip,
        take: limit,
      }),
@@ -114,11 +98,6 @@ export class TasksService {
  ) {
    await this.assertCanEditTasks(actorUserId, labOrganizationId);

-    const membership = await this.getMembership(actorUserId, labOrganizationId);
-    if (!membership) {
-      throw new ForbiddenException('You are not a member of this organization');
-    }
-
    const task = await this.prisma.labCaseTask.findFirst({
      where: {
        id: taskId,
@@ -134,14 +113,29 @@ export class TasksService {
      throw new NotFoundException('Task not found');
    }

-    if (!membership.isOwner && task.assigneeUserId !== actorUserId) {
-      throw new ForbiddenException('You can only update tasks assigned to you');
-    }
+    const updated = await this.prisma.$transaction(async (tx) => {
+      const result = await tx.labCaseTask.update({
+        where: { id: taskId },
+        data: {
+          status: dto.status,
+          lastStatusChangedByUserId: actorUserId,
+          lastStatusChangedAt: new Date(),
+        },
+        include: taskListInclude,
+      });

-    const updated = await this.prisma.labCaseTask.update({
-      where: { id: taskId },
-      data: { status: dto.status },
-      include: taskListInclude,
+      if (task.status !== dto.status) {
+        await tx.labCaseTaskStatusEvent.create({
+          data: {
+            taskId,
+            fromStatus: task.status,
+            toStatus: dto.status,
+            changedByUserId: actorUserId,
+          },
+        });
+      }
+
+      return result;
    });

    const locale = normalizeCatalogLocale(localeInput);
@@ -154,6 +148,100 @@ export class TasksService {
    return { success: true, data: this.mapTaskListItem(updated, prosthesisLabels) };
  }

+  private buildListWhere(
+    labOrganizationId: string,
+    query: ListLabTasksDto,
+  ): Prisma.LabCaseTaskWhereInput {
+    const sentAtFilter: Prisma.DateTimeNullableFilter = { not: null };
+
+    if (query.sentFrom) {
+      const from = new Date(query.sentFrom);
+      if (Number.isNaN(from.getTime())) {
+        throw new BadRequestException('Invalid sentFrom date');
+      }
+      sentAtFilter.gte = from;
+    }
+    if (query.sentTo) {
+      const to = new Date(query.sentTo);
+      if (Number.isNaN(to.getTime())) {
+        throw new BadRequestException('Invalid sentTo date');
+      }
+      to.setHours(23, 59, 59, 999);
+      sentAtFilter.lte = to;
+    }
+
+    // Status: explicit status wins; completed=true/false narrows; otherwise no status filter.
+    let status: LabTaskStatus | undefined;
+    if (query.status) {
+      status = query.status;
+    } else if (query.completed === true) {
+      status = LabTaskStatus.COMPLETED;
+    } else if (query.completed === false) {
+      status = LabTaskStatus.IN_PROGRESS;
+    }
+
+    return {
+      labCase: {
+        sentAt: sentAtFilter,
+        sends: { some: { organizationId: labOrganizationId } },
+        ...(query.clinicOrganizationId
+          ? { treatment: { organizationId: query.clinicOrganizationId } }
+          : {}),
+        ...(query.q?.trim() ? { treatment: this.buildSearchWhere(query.q.trim()) } : {}),
+      },
+      ...(status !== undefined ? { status } : {}),
+      ...(query.important !== undefined ? { isImportant: query.important } : {}),
+    };
+  }
+
+  private buildSearchWhere(q: string): Prisma.TreatmentWhereInput {
+    const orConditions: Prisma.PatientWhereInput[] = [
+      { firstName: { contains: q, mode: 'insensitive' } },
+      { lastName: { contains: q, mode: 'insensitive' } },
+    ];
+    const normalized = normalizeMobile(q);
+    if (normalized) {
+      orConditions.push({ mobile: normalized });
+    }
+    return {
+      OR: [
+        { patient: { OR: orConditions } },
+        { organization: { name: { contains: q, mode: 'insensitive' } } },
+      ],
+    };
+  }
+
+  private buildOrderBy(query: ListLabTasksDto): Prisma.LabCaseTaskOrderByWithRelationInput[] {
+    const dir = query.sortDir ?? 'desc';
+    switch (query.sortBy) {
+      case 'status':
+        return [{ status: dir }, { createdAt: 'desc' }, { id: 'asc' }];
+      case 'clinic':
+        return [
+          { labCase: { treatment: { organization: { name: dir } } } },
+          { createdAt: 'desc' },
+          { id: 'asc' },
+        ];
+      case 'patient':
+        return [
+          { labCase: { treatment: { patient: { lastName: dir } } } },
+          { labCase: { treatment: { patient: { firstName: dir } } } },
+          { id: 'asc' },
+        ];
+      case 'important':
+        return [{ isImportant: dir }, { createdAt: 'desc' }, { id: 'asc' }];
+      case 'date':
+      default:
+        return [
+          { labCase: { sentAt: dir } },
+          { labCaseId: 'asc' },
+          { treatmentDetailId: 'asc' },
+          { stepOrder: 'asc' },
+          { id: 'asc' },
+        ];
+    }
+  }
+
  private mapTaskListItem(
    task: Prisma.LabCaseTaskGetPayload<{ include: typeof taskListInclude }>,
    prosthesisLabels: Map<string, string>,
@@ -161,21 +249,22 @@ export class TasksService {
    return {
      id: task.id,
      labCaseId: task.labCaseId,
-      tooth: task.tooth,
+      treatmentDetailId: task.treatmentDetailId,
+      teeth: normalizeTaskTeeth(task.teeth),
      treatmentType: task.treatmentType,
      prosthesisTypeCode: task.prosthesisTypeCode,
      prosthesisTypeLabel:
        prosthesisLabels.get(task.prosthesisTypeCode) ?? task.prosthesisTypeCode,
+      workflowStepCode: task.workflowStepCode,
      stepOrder: task.stepOrder,
      stepLabel: task.stepLabel,
      status: task.status,
-      priority: task.priority,
-      assignedAt: task.assignedAt?.toISOString() ?? null,
-      createdAt: task.createdAt.toISOString(),
-      assigneeUserId: task.assigneeUserId,
-      assignee: task.assignee
-        ? { id: task.assignee.id, name: task.assignee.name, email: task.assignee.email }
+      isImportant: task.isImportant,
+      lastStatusChangedAt: task.lastStatusChangedAt?.toISOString() ?? null,
+      lastStatusChangedBy: task.lastStatusChangedBy
+        ? { id: task.lastStatusChangedBy.id, name: task.lastStatusChangedBy.name }
        : null,
+      createdAt: task.createdAt.toISOString(),
      clinic: task.labCase.treatment.organization,
      patient: {
        id: task.labCase.treatment.patient.id,
--- a/frontend/messages/en.json
+++ b/frontend/messages/en.json
@@ -319,7 +319,7 @@
  },
  "cases": {
    "title": "Cases",
-    "subtitle": "Lab cases sent from linked clinics. Assign tasks and track progress by tooth.",
+    "subtitle": "Lab cases sent from linked clinics. Track progress and flag important tasks.",
    "searchPlaceholder": "Search by patient name or mobile…",
    "emptyList": "No cases received yet.",
    "selectCaseHint": "Select a case from the list to view tasks.",
@@ -329,13 +329,17 @@
    "taskProgressShort": "{progress} tasks",
    "treatmentDetails": "Treatment details",
    "teethLabel": "Teeth",
-    "tasksByTooth": "Tasks by tooth",
-    "toothGroupTitle": "Tooth {tooth} · {prosthesis} · {type}",
+    "tasksByTooth": "Tasks",
+    "toothGroupTitle": "Teeth {teeth} · {prosthesis}",
    "noTasks": "No tasks were generated for this case.",
-    "unassigned": "Unassigned",
-    "statusPending": "Pending",
    "statusInProgress": "In progress",
    "statusCompleted": "Completed",
+    "importantLabel": "Important",
+    "markImportant": "Mark as important",
+    "lastUpdatedBy": "Updated by {name}",
+    "lastUpdatedUnknown": "Not started yet",
+    "timelineTitle": "History",
+    "timelineEntry": "{status} · {name} · {date}",
    "errorLoadList": "Failed to load cases.",
    "errorLoadDetail": "Failed to load case details.",
    "errorUpdateTask": "Failed to update task.",
@@ -351,32 +355,63 @@
    "prevPage": "Previous",
    "nextPage": "Next",
    "pageSummary": "Page {page} of {totalPages} ({total} cases)",
-    "priorityLabel": "Priority",
    "statusLabel": "Status"
  },
  "tasks": {
    "title": "Tasks",
-    "subtitle": "Your assigned lab tasks. Update status as you work through each step.",
-    "subtitleOwner": "All lab tasks in the organization. Assign tasks from Cases; update status on your own assignments here.",
+    "subtitle": "All lab tasks from connected clinics. Filter, sort, and update the status of each step.",
+    "subtitleOwner": "All lab tasks from connected clinics. Filter, sort, and update the status of each step.",
    "loading": "Loading tasks…",
-    "emptyList": "No tasks assigned to you yet.",
-    "emptyListOwner": "No tasks in the lab inbox yet.",
+    "emptyList": "No tasks match the current filters.",
+    "emptyListOwner": "No tasks match the current filters.",
    "noPermissionTitle": "Tasks",
    "noPermissionBody": "You do not have permission to view tasks for this organization.",
    "fromClinic": "From {name}",
    "patientLabel": "Patient",
    "taskDate": "{date}",
-    "priorityLabel": "Priority {n}",
-    "toothLabel": "Tooth {tooth}",
-    "unassigned": "Unassigned",
-    "assignedTo": "Assigned to {name}",
-    "statusPending": "Pending",
+    "teethLabel": "Teeth {teeth}",
+    "importantBadge": "Important",
+    "lastUpdatedBy": "Updated by {name}",
    "statusInProgress": "In progress",
    "statusCompleted": "Completed",
+    "searchPlaceholder": "Search patient or clinic…",
+    "filterClinic": "Clinic",
+    "filterClinicAll": "All clinics",
+    "filterStatus": "Status",
+    "filterStatusAll": "All statuses",
+    "showCompleted": "Show completed",
+    "importantOnly": "Important only",
+    "filterSentFrom": "From",
+    "filterSentTo": "To",
+    "sortBy": "Sort by",
+    "sortDate": "Date",
+    "sortStatus": "Status",
+    "sortClinic": "Clinic",
+    "sortPatient": "Patient",
+    "sortImportant": "Important",
+    "clearFilters": "Clear filters",
+    "commentsButton": "Comments",
    "errorLoadList": "Failed to load tasks.",
    "errorUpdateTask": "Failed to update task.",
    "pageSummary": "Page {page} of {totalPages} ({total} tasks)"
  },
+  "caseComments": {
+    "title": "Comments",
+    "placeholder": "Write a comment…",
+    "reply": "Reply…",
+    "post": "Post",
+    "empty": "No comments yet.",
+    "visibleToClinicToggle": "Visible to clinic",
+    "clinicCanSee": "Clinic can see this",
+    "hiddenFromClinic": "Hidden from clinic",
+    "makeVisible": "Make visible to clinic",
+    "makeHidden": "Hide from clinic",
+    "labAuthor": "Lab",
+    "clinicAuthor": "Clinic",
+    "errorLoad": "Failed to load comments.",
+    "errorPost": "Failed to post comment.",
+    "errorToggle": "Failed to update comment visibility."
+  },
  "appointments": {
    "title": "Appointments",
    "subtitle": "Search a patient, pick a date, then click a time slot under a provider to book.",
--- a/frontend/messages/fa.json
+++ b/frontend/messages/fa.json
@@ -319,7 +319,7 @@
  },
  "cases": {
    "title": "پرونده‌ها",
-    "subtitle": "پرونده‌های ارسالی از کلینیک‌های متصل. وظایف را تخصیص دهید و پیشرفت هر دندان را پیگیری کنید.",
+    "subtitle": "پرونده‌های ارسالی از کلینیک‌های متصل. پیشرفت را پیگیری کنید و وظایف مهم را علامت بزنید.",
    "searchPlaceholder": "جستجو با نام یا موبایل بیمار…",
    "emptyList": "هنوز پرونده‌ای دریافت نشده است.",
    "selectCaseHint": "برای مشاهده وظایف، یک پرونده از فهرست انتخاب کنید.",
@@ -329,13 +329,17 @@
    "taskProgressShort": "{progress} وظیفه",
    "treatmentDetails": "جزئیات درمان",
    "teethLabel": "دندان‌ها",
-    "tasksByTooth": "وظایف به تفکیک دندان",
-    "toothGroupTitle": "دندان {tooth} · {prosthesis} · {type}",
+    "tasksByTooth": "وظایف",
+    "toothGroupTitle": "دندان‌های {teeth} · {prosthesis}",
    "noTasks": "برای این پرونده وظیفه‌ای ایجاد نشده است.",
-    "unassigned": "بدون مسئول",
-    "statusPending": "در انتظار",
    "statusInProgress": "در حال انجام",
    "statusCompleted": "انجام شده",
+    "importantLabel": "مهم",
+    "markImportant": "علامت‌گذاری به عنوان مهم",
+    "lastUpdatedBy": "به‌روزرسانی توسط {name}",
+    "lastUpdatedUnknown": "هنوز شروع نشده",
+    "timelineTitle": "تاریخچه",
+    "timelineEntry": "{status} · {name} · {date}",
    "errorLoadList": "بارگذاری پرونده‌ها ناموفق بود.",
    "errorLoadDetail": "بارگذاری جزئیات پرونده ناموفق بود.",
    "errorUpdateTask": "به‌روزرسانی وظیفه ناموفق بود.",
@@ -351,32 +355,63 @@
    "prevPage": "قبلی",
    "nextPage": "بعدی",
    "pageSummary": "صفحه {page} از {totalPages} ({total} پرونده)",
-    "priorityLabel": "اولویت",
    "statusLabel": "وضعیت"
  },
  "tasks": {
    "title": "وظایف",
-    "subtitle": "وظایف لاب اختصاص‌یافته به شما. وضعیت را در حین انجام هر مرحله به‌روز کنید.",
-    "subtitleOwner": "همه وظایف لاب در سازمان. تخصیص از بخش پرونده‌ها؛ به‌روزرسانی وضعیت برای وظایف خودتان اینجا.",
+    "subtitle": "همه وظایف لاب از کلینیک‌های متصل. فیلتر، مرتب‌سازی و به‌روزرسانی وضعیت هر مرحله.",
+    "subtitleOwner": "همه وظایف لاب از کلینیک‌های متصل. فیلتر، مرتب‌سازی و به‌روزرسانی وضعیت هر مرحله.",
    "loading": "در حال بارگذاری وظایف…",
-    "emptyList": "هنوز وظیفه‌ای به شما اختصاص داده نشده است.",
-    "emptyListOwner": "هنوز وظیفه‌ای در صندوق ورودی لاب وجود ندارد.",
+    "emptyList": "هیچ وظیفه‌ای با فیلترهای فعلی مطابقت ندارد.",
+    "emptyListOwner": "هیچ وظیفه‌ای با فیلترهای فعلی مطابقت ندارد.",
    "noPermissionTitle": "وظایف",
    "noPermissionBody": "شما مجوز مشاهده وظایف برای این سازمان را ندارید.",
    "fromClinic": "از {name}",
    "patientLabel": "بیمار",
    "taskDate": "{date}",
-    "priorityLabel": "اولویت {n}",
-    "toothLabel": "دندان {tooth}",
-    "unassigned": "اختصاص داده نشده",
-    "assignedTo": "اختصاص به {name}",
-    "statusPending": "در انتظار",
+    "teethLabel": "دندان‌های {teeth}",
+    "importantBadge": "مهم",
+    "lastUpdatedBy": "به‌روزرسانی توسط {name}",
    "statusInProgress": "در حال انجام",
    "statusCompleted": "تکمیل‌شده",
+    "searchPlaceholder": "جستجوی بیمار یا کلینیک…",
+    "filterClinic": "کلینیک",
+    "filterClinicAll": "همه کلینیک‌ها",
+    "filterStatus": "وضعیت",
+    "filterStatusAll": "همه وضعیت‌ها",
+    "showCompleted": "نمایش تکمیل‌شده‌ها",
+    "importantOnly": "فقط مهم‌ها",
+    "filterSentFrom": "از",
+    "filterSentTo": "تا",
+    "sortBy": "مرتب‌سازی بر اساس",
+    "sortDate": "تاریخ",
+    "sortStatus": "وضعیت",
+    "sortClinic": "کلینیک",
+    "sortPatient": "بیمار",
+    "sortImportant": "مهم",
+    "clearFilters": "پاک کردن فیلترها",
+    "commentsButton": "نظرات",
    "errorLoadList": "بارگذاری وظایف ناموفق بود.",
    "errorUpdateTask": "به‌روزرسانی وظیفه ناموفق بود.",
    "pageSummary": "صفحه {page} از {totalPages} ({total} وظیفه)"
  },
+  "caseComments": {
+    "title": "نظرات",
+    "placeholder": "یک نظر بنویسید…",
+    "reply": "پاسخ…",
+    "post": "ثبت",
+    "empty": "هنوز نظری ثبت نشده است.",
+    "visibleToClinicToggle": "قابل مشاهده برای کلینیک",
+    "clinicCanSee": "کلینیک می‌تواند ببیند",
+    "hiddenFromClinic": "پنهان از کلینیک",
+    "makeVisible": "نمایش به کلینیک",
+    "makeHidden": "پنهان از کلینیک",
+    "labAuthor": "آزمایشگاه",
+    "clinicAuthor": "کلینیک",
+    "errorLoad": "بارگذاری نظرات ناموفق بود.",
+    "errorPost": "ثبت نظر ناموفق بود.",
+    "errorToggle": "به‌روزرسانی وضعیت نمایش نظر ناموفق بود."
+  },
  "appointments": {
    "title": "نوبت‌ها",
    "subtitle": "یک بیمار را جستجو کنید، تاریخ را انتخاب کنید، سپس روی یک زمان در زیر ارائه‌دهنده کلیک کنید تا رزرو کنید.",
--- a/frontend/messages/nl.json
+++ b/frontend/messages/nl.json
@@ -319,7 +319,7 @@
  },
  "cases": {
    "title": "Dossiers",
-    "subtitle": "Labdossiers van gekoppelde klinieken. Wijs taken toe en volg de voortgang per tand.",
+    "subtitle": "Labdossiers van gekoppelde klinieken. Volg de voortgang en markeer belangrijke taken.",
    "searchPlaceholder": "Zoeken op patiëntnaam of mobiel…",
    "emptyList": "Nog geen dossiers ontvangen.",
    "selectCaseHint": "Selecteer een dossier uit de lijst om taken te bekijken.",
@@ -329,13 +329,17 @@
    "taskProgressShort": "{progress} taken",
    "treatmentDetails": "Behandeldetails",
    "teethLabel": "Tanden",
-    "tasksByTooth": "Taken per tand",
-    "toothGroupTitle": "Tand {tooth} · {prosthesis} · {type}",
+    "tasksByTooth": "Taken",
+    "toothGroupTitle": "Tanden {teeth} · {prosthesis}",
    "noTasks": "Er zijn geen taken gegenereerd voor dit dossier.",
-    "unassigned": "Niet toegewezen",
-    "statusPending": "In afwachting",
    "statusInProgress": "Bezig",
    "statusCompleted": "Voltooid",
+    "importantLabel": "Belangrijk",
+    "markImportant": "Markeren als belangrijk",
+    "lastUpdatedBy": "Bijgewerkt door {name}",
+    "lastUpdatedUnknown": "Nog niet gestart",
+    "timelineTitle": "Geschiedenis",
+    "timelineEntry": "{status} · {name} · {date}",
    "errorLoadList": "Dossiers laden mislukt.",
    "errorLoadDetail": "Dossierdetails laden mislukt.",
    "errorUpdateTask": "Taak bijwerken mislukt.",
@@ -351,32 +355,63 @@
    "prevPage": "Vorige",
    "nextPage": "Volgende",
    "pageSummary": "Pagina {page} van {totalPages} ({total} dossiers)",
-    "priorityLabel": "Prioriteit",
    "statusLabel": "Status"
  },
  "tasks": {
    "title": "Taken",
-    "subtitle": "Uw toegewezen labtaken. Werk de status bij terwijl u elke stap uitvoert.",
-    "subtitleOwner": "Alle labtaken in de organisatie. Wijs toe via Dossiers; werk hier de status bij voor uw eigen taken.",
+    "subtitle": "Alle labtaken van gekoppelde klinieken. Filter, sorteer en werk de status van elke stap bij.",
+    "subtitleOwner": "Alle labtaken van gekoppelde klinieken. Filter, sorteer en werk de status van elke stap bij.",
    "loading": "Taken laden…",
-    "emptyList": "Nog geen taken aan u toegewezen.",
-    "emptyListOwner": "Nog geen taken in de lab-inbox.",
+    "emptyList": "Geen taken komen overeen met de huidige filters.",
+    "emptyListOwner": "Geen taken komen overeen met de huidige filters.",
    "noPermissionTitle": "Taken",
    "noPermissionBody": "U heeft geen toestemming om taken voor deze organisatie te bekijken.",
    "fromClinic": "Van {name}",
    "patientLabel": "Patiënt",
    "taskDate": "{date}",
-    "priorityLabel": "Prioriteit {n}",
-    "toothLabel": "Tand {tooth}",
-    "unassigned": "Niet toegewezen",
-    "assignedTo": "Toegewezen aan {name}",
-    "statusPending": "In afwachting",
+    "teethLabel": "Tanden {teeth}",
+    "importantBadge": "Belangrijk",
+    "lastUpdatedBy": "Bijgewerkt door {name}",
    "statusInProgress": "Bezig",
    "statusCompleted": "Voltooid",
+    "searchPlaceholder": "Zoek patiënt of kliniek…",
+    "filterClinic": "Kliniek",
+    "filterClinicAll": "Alle klinieken",
+    "filterStatus": "Status",
+    "filterStatusAll": "Alle statussen",
+    "showCompleted": "Voltooide tonen",
+    "importantOnly": "Alleen belangrijk",
+    "filterSentFrom": "Vanaf",
+    "filterSentTo": "Tot",
+    "sortBy": "Sorteren op",
+    "sortDate": "Datum",
+    "sortStatus": "Status",
+    "sortClinic": "Kliniek",
+    "sortPatient": "Patiënt",
+    "sortImportant": "Belangrijk",
+    "clearFilters": "Filters wissen",
+    "commentsButton": "Opmerkingen",
    "errorLoadList": "Taken laden mislukt.",
    "errorUpdateTask": "Taak bijwerken mislukt.",
    "pageSummary": "Pagina {page} van {totalPages} ({total} taken)"
  },
+  "caseComments": {
+    "title": "Opmerkingen",
+    "placeholder": "Schrijf een opmerking…",
+    "reply": "Antwoorden…",
+    "post": "Plaatsen",
+    "empty": "Nog geen opmerkingen.",
+    "visibleToClinicToggle": "Zichtbaar voor kliniek",
+    "clinicCanSee": "Kliniek kan dit zien",
+    "hiddenFromClinic": "Verborgen voor kliniek",
+    "makeVisible": "Zichtbaar maken voor kliniek",
+    "makeHidden": "Verbergen voor kliniek",
+    "labAuthor": "Lab",
+    "clinicAuthor": "Kliniek",
+    "errorLoad": "Opmerkingen laden mislukt.",
+    "errorPost": "Opmerking plaatsen mislukt.",
+    "errorToggle": "Zichtbaarheid bijwerken mislukt."
+  },
  "appointments": {
    "title": "Afspraken",
    "subtitle": "Zoek een patiënt, kies een datum en klik vervolgens op een tijdslot onder een aanbieder om te boeken.",
--- a/frontend/src/app/[locale]/(dashboard)/cases/page.tsx
+++ b/frontend/src/app/[locale]/(dashboard)/cases/page.tsx
@@ -17,16 +17,18 @@ import { FORM_SELECT_CLASS } from '@/components/ui/shared/formSelectStyles';
 import { SearchBar } from '@/components/ui/shared/SearchBar';
 import type { TreatmentCatalogEntry } from '@/types/treatment-catalog';
 import type {
-  AssignableMember,
  CasesFilterOptions,
  LabCaseDetail,
  LabCaseListItem,
  LabTaskStatus,
  PaginatedLabCases,
 } from '@/types/cases';
+import {
+  formatToothList,
+  prosthesisTypeBadgeStyle,
+} from '@/components/ui/treatment/prosthesisTypeDisplay';

 const PAGE_SIZE = 20;
-const PRIORITY_OPTIONS = [1, 2, 3, 4, 5] as const;

 function taskStatusVariant(status: LabTaskStatus): BadgeVariant {
  switch (status) {
@@ -100,7 +102,6 @@ export default function CasesPage() {

  const [selectedCaseId, setSelectedCaseId] = useState<string | null>(null);
  const [selectedCase, setSelectedCase] = useState<LabCaseDetail | null>(null);
-  const [members, setMembers] = useState<AssignableMember[]>([]);
  const [loadingList, setLoadingList] = useState(false);
  const [loadingDetail, setLoadingDetail] = useState(false);
  const [updatingTaskId, setUpdatingTaskId] = useState<string | null>(null);
@@ -115,7 +116,6 @@ export default function CasesPage() {

  const statusOptions: { value: LabTaskStatus; label: string }[] = useMemo(
    () => [
-      { value: 'PENDING', label: t('statusPending') },
      { value: 'IN_PROGRESS', label: t('statusInProgress') },
      { value: 'COMPLETED', label: t('statusCompleted') },
    ],
@@ -171,7 +171,6 @@ export default function CasesPage() {

  useEffect(() => {
    void casesApi.listFilterOptions().then((r) => setFilterOptions(r.data)).catch(() => {});
-    void casesApi.listAssignableMembers().then((r) => setMembers(r.data)).catch(() => {});
    void treatmentCatalogApi.list().then((r) => setTreatmentCatalog(r.data)).catch(() => {});
    // eslint-disable-next-line react-hooks/exhaustive-deps -- mount-only initial fetch
  }, []);
@@ -216,25 +215,14 @@ export default function CasesPage() {
    setPage(1);
  }

-  async function handleTaskUpdate(
-    taskId: string,
-    payload: { assigneeUserId?: string | null; priority?: number },
-  ) {
+  async function handleImportantToggle(taskId: string, isImportant: boolean) {
    if (!selectedCaseId || !canEdit) return;

    setUpdatingTaskId(taskId);
    toast.setError('');
    try {
-      await casesApi.updateTask(selectedCaseId, taskId, payload);
+      await casesApi.setTaskImportant(selectedCaseId, taskId, isImportant);
      await loadDetail(selectedCaseId);
-      await loadCases({
-        q: search,
-        clinicOrganizationId: clinicId,
-        treatmentType,
-        sentFrom,
-        sentTo,
-        page,
-      });
    } catch (error: unknown) {
      toast.showError(formatApiErrorMessage(error, t('errorUpdateTask')));
    } finally {
@@ -476,65 +464,65 @@ export default function CasesPage() {
                {selectedCase.tasksByTooth.length === 0 ? (
                  <p className="text-sm text-text-muted">{t('noTasks')}</p>
                ) : (
-                  selectedCase.tasksByTooth.map((group) => (
+                  selectedCase.tasksByTooth.map((group, groupIndex) => (
                    <div
-                      key={`${group.tooth}-${group.treatmentType}`}
+                      key={`${group.treatmentDetailId}-${group.prosthesisTypeCode}`}
                      className="rounded-md border border-border p-3 space-y-2"
                    >
-                      <div className="text-sm font-medium text-text-primary">
-                        {t('toothGroupTitle', {
-                          tooth: group.tooth,
-                          prosthesis: group.prosthesisTypeLabel,
-                          type: treatmentLabel(group.treatmentType),
-                        })}
+                      <div className="flex flex-wrap items-center gap-2">
+                        <span
+                          className="inline-flex items-center rounded px-2 py-0.5 text-xs font-medium border"
+                          style={prosthesisTypeBadgeStyle(group.prosthesisTypeCode, groupIndex)}
+                        >
+                          {group.prosthesisTypeLabel}
+                        </span>
+                        <span className="text-sm font-medium text-text-primary">
+                          {t('toothGroupTitle', {
+                            teeth: formatToothList(group.teeth),
+                            prosthesis: group.prosthesisTypeLabel,
+                          })}
+                        </span>
                      </div>
                      <ul className="space-y-2">
                        {group.tasks.map((task) => (
                          <li
                            key={task.id}
-                            className="grid gap-2 sm:grid-cols-[minmax(0,1fr)_auto_88px_180px] items-center text-sm rounded bg-background p-2"
+                            className="rounded bg-background p-2 text-sm space-y-1"
                          >
-                            <span>
-                              {task.stepOrder}. {task.stepLabel}
-                            </span>
-                            <Badge variant={taskStatusVariant(task.status)} fixedWidth={false}>
-                              {statusOptions.find((opt) => opt.value === task.status)?.label ??
-                                task.status}
-                            </Badge>
-                            <select
-                              value={task.priority}
-                              disabled={!canEdit || updatingTaskId === task.id}
-                              onChange={(e) =>
-                                void handleTaskUpdate(task.id, {
-                                  priority: Number(e.target.value),
-                                })
-                              }
-                              className={FORM_SELECT_CLASS}
-                              aria-label={t('priorityLabel')}
-                            >
-                              {PRIORITY_OPTIONS.map((value) => (
-                                <option key={value} value={value}>
-                                  {value}
-                                </option>
-                              ))}
-                            </select>
-                            <select
-                              value={task.assigneeUserId ?? ''}
-                              disabled={!canEdit || updatingTaskId === task.id}
-                              onChange={(e) =>
-                                void handleTaskUpdate(task.id, {
-                                  assigneeUserId: e.target.value || null,
-                                })
-                              }
-                              className={FORM_SELECT_CLASS}
-                            >
-                              <option value="">{t('unassigned')}</option>
-                              {members.map((member) => (
-                                <option key={member.userId} value={member.userId}>
-                                  {member.name}
-                                </option>
-                              ))}
-                            </select>
+                            <div className="flex flex-wrap items-center gap-2">
+                              <span className="min-w-0 flex-1">
+                                {task.stepOrder}. {task.stepLabel}
+                              </span>
+                              <Badge variant={taskStatusVariant(task.status)} fixedWidth={false}>
+                                {statusOptions.find((opt) => opt.value === task.status)?.label ??
+                                  task.status}
+                              </Badge>
+                              {canEdit ? (
+                                <label className="flex items-center gap-1.5 text-xs cursor-pointer shrink-0">
+                                  <input
+                                    type="checkbox"
+                                    checked={task.isImportant}
+                                    disabled={updatingTaskId === task.id}
+                                    onChange={(e) =>
+                                      void handleImportantToggle(task.id, e.target.checked)
+                                    }
+                                  />
+                                  {t('importantLabel')}
+                                </label>
+                              ) : task.isImportant ? (
+                                <Badge variant="warning" fixedWidth={false}>
+                                  {t('importantLabel')}
+                                </Badge>
+                              ) : null}
+                            </div>
+                            <p className="text-[11px] text-text-muted">
+                              {task.lastStatusChangedBy
+                                ? t('lastUpdatedBy', { name: task.lastStatusChangedBy.name })
+                                : t('lastUpdatedUnknown')}
+                              {task.lastStatusChangedAt
+                                ? ` · ${formatDateTime(task.lastStatusChangedAt, locale)}`
+                                : ''}
+                            </p>
                          </li>
                        ))}
                      </ul>
--- a/frontend/src/app/[locale]/(dashboard)/tasks/page.tsx
+++ b/frontend/src/app/[locale]/(dashboard)/tasks/page.tsx
@@ -1,12 +1,19 @@
 'use client';

-import { useEffect, useMemo, useRef, useState } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { useTranslations } from 'next-intl';
+import { MessageSquare } from 'lucide-react';
 import { ToastStack } from '@/components/ui/shared/Toast';
 import { Badge, type BadgeVariant } from '@/components/ui/shared/Badge';
 import { Button } from '@/components/ui/shared/Button';
 import { FORM_SELECT_CLASS } from '@/components/ui/shared/formSelectStyles';
+import { SearchBar } from '@/components/ui/shared/SearchBar';
 import { TreatmentTypeBadge } from '@/components/ui/treatment/TreatmentTypeBadge';
+import { LabCaseCommentsPanel } from '@/components/ui/lab/LabCaseCommentsPanel';
+import {
+  formatToothList,
+  prosthesisTypeBadgeStyle,
+} from '@/components/ui/treatment/prosthesisTypeDisplay';
 import { formatApiErrorMessage } from '@/components/shared/formatApiError';
 import { canEditTasks, canViewTasks } from '@/components/shared/permissions';
 import { useAuth } from '@/lib/hooks/useAuth';
@@ -14,20 +21,19 @@ import { useToast } from '@/lib/hooks/useToast';
 import { tasksApi } from '@/lib/api/tasks';
 import { treatmentCatalogApi } from '@/lib/api/treatment-catalog';
 import { treatmentTypeLabelFromCatalog } from '@/components/ui/treatment/treatmentTypeDisplay';
-import type { LabTaskListItem, LabTaskStatus, PaginatedLabTasks } from '@/types/cases';
+import type {
+  LabTaskListItem,
+  LabTaskStatus,
+  ListLabTasksParams,
+  PaginatedLabTasks,
+  TaskSortField,
+} from '@/types/cases';
 import type { TreatmentCatalogEntry } from '@/types/treatment-catalog';

 const PAGE_SIZE = 50;

 function taskStatusVariant(status: LabTaskStatus): BadgeVariant {
-  switch (status) {
-    case 'COMPLETED':
-      return 'success';
-    case 'IN_PROGRESS':
-      return 'default';
-    default:
-      return 'warning';
-  }
+  return status === 'COMPLETED' ? 'success' : 'default';
 }

 function formatPatientName(patient: { firstName: string; lastName: string }) {
@@ -50,64 +56,94 @@ export default function TasksPage() {
  const [loading, setLoading] = useState(false);
  const [updatingTaskId, setUpdatingTaskId] = useState<string | null>(null);
  const [treatmentCatalog, setTreatmentCatalog] = useState<TreatmentCatalogEntry[]>([]);
+  const [expandedCommentsCaseId, setExpandedCommentsCaseId] = useState<string | null>(null);
+
+  const [search, setSearch] = useState('');
+  const [clinicId, setClinicId] = useState('');
+  const [statusFilter, setStatusFilter] = useState<'' | LabTaskStatus>('');
+  const [showCompleted, setShowCompleted] = useState(false);
+  const [importantOnly, setImportantOnly] = useState(false);
+  const [sentFrom, setSentFrom] = useState('');
+  const [sentTo, setSentTo] = useState('');
+  const [sortBy, setSortBy] = useState<TaskSortField>('date');
+  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('desc');

  const canView = canViewTasks(currentOrganization);
  const canEdit = canEditTasks(currentOrganization);
  const locale = user?.language ?? 'en';
-  const isOwner = Boolean(currentOrganization?.isOwner);

  const tRef = useRef(t);
  tRef.current = t;

  const statusOptions: { value: LabTaskStatus; label: string }[] = useMemo(
    () => [
-      { value: 'PENDING', label: t('statusPending') },
      { value: 'IN_PROGRESS', label: t('statusInProgress') },
      { value: 'COMPLETED', label: t('statusCompleted') },
    ],
    [t],
  );

+  const listParams = useMemo((): ListLabTasksParams => {
+    const params: ListLabTasksParams = {
+      page,
+      limit: PAGE_SIZE,
+      sortBy,
+      sortDir,
+    };
+    if (search.trim()) params.q = search.trim();
+    if (clinicId) params.clinicOrganizationId = clinicId;
+    if (statusFilter) {
+      params.status = statusFilter;
+    } else if (showCompleted) {
+      params.completed = undefined;
+    } else {
+      params.completed = false;
+    }
+    if (importantOnly) params.important = true;
+    if (sentFrom) params.sentFrom = sentFrom;
+    if (sentTo) params.sentTo = sentTo;
+    return params;
+  }, [page, search, clinicId, statusFilter, showCompleted, importantOnly, sentFrom, sentTo, sortBy, sortDir]);
+
+  const clinicOptions = useMemo(() => {
+    const map = new Map<string, string>();
+    for (const task of tasks) {
+      map.set(task.clinic.id, task.clinic.name);
+    }
+    return [...map.entries()].map(([id, name]) => ({ id, name }));
+  }, [tasks]);
+
+  const loadTasks = useCallback(async () => {
+    setLoading(true);
+    setError('');
+    try {
+      const response = await tasksApi.list(listParams);
+      setTasks(response.data.items);
+      setPagination(response.data.pagination);
+    } catch (error: unknown) {
+      showError(formatApiErrorMessage(error, tRef.current('errorLoadList')));
+    } finally {
+      setLoading(false);
+    }
+  }, [listParams, showError, setError]);
+
  useEffect(() => {
    void treatmentCatalogApi.list().then((r) => setTreatmentCatalog(r.data)).catch(() => {});
  }, []);

  useEffect(() => {
    if (!canView) return;
-
-    let cancelled = false;
-
-    void (async () => {
-      setLoading(true);
-      setError('');
-      try {
-        const response = await tasksApi.list({ page, limit: PAGE_SIZE });
-        if (cancelled) return;
-        setTasks(response.data.items);
-        setPagination(response.data.pagination);
-      } catch (error: unknown) {
-        if (cancelled) return;
-        showError(formatApiErrorMessage(error, tRef.current('errorLoadList')));
-      } finally {
-        if (!cancelled) setLoading(false);
-      }
-    })();
-
-    return () => {
-      cancelled = true;
-    };
-  }, [canView, page, showError, setError]);
+    const timeout = setTimeout(() => void loadTasks(), search ? 300 : 0);
+    return () => clearTimeout(timeout);
+  }, [canView, loadTasks, search]);

  async function handleStatusUpdate(taskId: string, status: LabTaskStatus) {
    if (!canEdit) return;
-
    setUpdatingTaskId(taskId);
    setError('');
    try {
      await tasksApi.updateStatus(taskId, status);
-      const response = await tasksApi.list({ page, limit: PAGE_SIZE });
-      setTasks(response.data.items);
-      setPagination(response.data.pagination);
+      await loadTasks();
    } catch (error: unknown) {
      showError(formatApiErrorMessage(error, t('errorUpdateTask')));
    } finally {
@@ -123,9 +159,7 @@ export default function TasksPage() {
    }).format(new Date(value));
  }

-  function sortDateForTask(task: LabTaskListItem) {
-    return task.assignedAt ?? task.createdAt;
-  }
+  const filterSelectClass = `${FORM_SELECT_CLASS} w-full rounded-md px-2 py-1.5 text-sm`;

  if (!isAuthReady) {
    return <div className="text-sm text-text-muted">{t('loading')}</div>;
@@ -144,89 +178,229 @@ export default function TasksPage() {
    <div className="space-y-4">
      <header className="space-y-1">
        <h1 className="text-2xl font-semibold text-text-primary">{t('title')}</h1>
-        <p className="text-sm text-text-secondary">
-          {isOwner ? t('subtitleOwner') : t('subtitle')}
-        </p>
+        <p className="text-sm text-text-secondary">{t('subtitle')}</p>
      </header>

+      <section className="surface-card p-3 space-y-3">
+        <SearchBar
+          embedded
+          value={search}
+          onChange={(v) => {
+            setSearch(v);
+            setPage(1);
+          }}
+          placeholder={t('searchPlaceholder')}
+        />
+        <div className="grid gap-2 sm:grid-cols-2 lg:grid-cols-4">
+          <label className="space-y-1">
+            <span className="text-xs text-text-muted">{t('filterClinic')}</span>
+            <select
+              value={clinicId}
+              onChange={(e) => {
+                setClinicId(e.target.value);
+                setPage(1);
+              }}
+              className={filterSelectClass}
+            >
+              <option value="">{t('filterClinicAll')}</option>
+              {clinicOptions.map((c) => (
+                <option key={c.id} value={c.id}>
+                  {c.name}
+                </option>
+              ))}
+            </select>
+          </label>
+          <label className="space-y-1">
+            <span className="text-xs text-text-muted">{t('filterStatus')}</span>
+            <select
+              value={statusFilter}
+              onChange={(e) => {
+                setStatusFilter(e.target.value as '' | LabTaskStatus);
+                setPage(1);
+              }}
+              className={filterSelectClass}
+            >
+              <option value="">{t('filterStatusAll')}</option>
+              {statusOptions.map((opt) => (
+                <option key={opt.value} value={opt.value}>
+                  {opt.label}
+                </option>
+              ))}
+            </select>
+          </label>
+          <label className="space-y-1">
+            <span className="text-xs text-text-muted">{t('sortBy')}</span>
+            <select
+              value={sortBy}
+              onChange={(e) => setSortBy(e.target.value as TaskSortField)}
+              className={filterSelectClass}
+            >
+              <option value="date">{t('sortDate')}</option>
+              <option value="status">{t('sortStatus')}</option>
+              <option value="clinic">{t('sortClinic')}</option>
+              <option value="patient">{t('sortPatient')}</option>
+              <option value="important">{t('sortImportant')}</option>
+            </select>
+          </label>
+          <label className="space-y-1">
+            <span className="text-xs text-text-muted"> </span>
+            <select
+              value={sortDir}
+              onChange={(e) => setSortDir(e.target.value as 'asc' | 'desc')}
+              className={filterSelectClass}
+            >
+              <option value="desc">↓</option>
+              <option value="asc">↑</option>
+            </select>
+          </label>
+        </div>
+        <div className="flex flex-wrap items-center gap-4 text-sm">
+          <label className="flex items-center gap-2 cursor-pointer">
+            <input
+              type="checkbox"
+              checked={showCompleted}
+              onChange={(e) => {
+                setShowCompleted(e.target.checked);
+                setPage(1);
+              }}
+            />
+            {t('showCompleted')}
+          </label>
+          <label className="flex items-center gap-2 cursor-pointer">
+            <input
+              type="checkbox"
+              checked={importantOnly}
+              onChange={(e) => {
+                setImportantOnly(e.target.checked);
+                setPage(1);
+              }}
+            />
+            {t('importantOnly')}
+          </label>
+        </div>
+      </section>
+
      <section className="surface-card min-h-[280px]">
        {loading && tasks.length === 0 ? (
          <p className="p-3 text-sm text-text-muted">{t('loading')}</p>
        ) : tasks.length === 0 ? (
-          <p className="p-3 text-sm text-text-muted">
-            {isOwner ? t('emptyListOwner') : t('emptyList')}
-          </p>
+          <p className="p-3 text-sm text-text-muted">{t('emptyList')}</p>
        ) : (
          <ul className="divide-y divide-border">
-            {tasks.map((task) => {
-              const statusEditable =
-                canEdit && (isOwner || task.assigneeUserId === user?.id);
+            {tasks.map((task, index) => {
+              const commentsOpen = expandedCommentsCaseId === task.labCaseId;

              return (
-                <li
-                  key={task.id}
-                  className="grid grid-cols-[minmax(0,1fr)_132px_auto] items-center gap-x-3 gap-y-0.5 px-3 py-2"
-                >
-                  <div className="min-w-0">
-                    <p className="text-sm font-medium text-text-primary truncate">
-                      {task.stepOrder}. {task.stepLabel}
-                    </p>
-                    <p className="text-[11px] text-text-secondary truncate">
-                      {t('fromClinic', { name: task.clinic.name })} ·{' '}
-                      {formatPatientName(task.patient)} · {t('toothLabel', { tooth: task.tooth })}
-                      {task.prosthesisTypeLabel ? ` · ${task.prosthesisTypeLabel}` : ''}
-                    </p>
-                    <p className="text-[11px] text-text-muted truncate flex flex-wrap items-center gap-x-1 gap-y-0.5">
-                      <span>{t('taskDate', { date: formatTaskDate(sortDateForTask(task)) })}</span>
-                      {isOwner && (
-                        <>
-                          <span aria-hidden>·</span>
-                          <Badge
-                            variant={task.assignee ? 'success' : 'danger'}
-                            fixedWidth={false}
-                          >
-                            {task.assignee
-                              ? t('assignedTo', { name: task.assignee.name })
-                              : t('unassigned')}
+                <li key={task.id}>
+                  <div className="grid grid-cols-[minmax(0,1fr)_132px_auto] items-center gap-x-3 gap-y-0.5 px-3 py-2">
+                    <div className="min-w-0">
+                      <div className="flex flex-wrap items-center gap-1.5">
+                        <p className="text-sm font-medium text-text-primary">
+                          {task.stepOrder}. {task.stepLabel}
+                        </p>
+                        {task.isImportant ? (
+                          <Badge variant="warning" fixedWidth={false}>
+                            {t('importantBadge')}
                          </Badge>
-                        </>
+                        ) : null}
+                        <span
+                          className="inline-flex items-center rounded px-1.5 py-0.5 text-[10px] font-medium border"
+                          style={prosthesisTypeBadgeStyle(task.prosthesisTypeCode, index)}
+                        >
+                          {task.prosthesisTypeLabel}
+                        </span>
+                      </div>
+                      <p className="text-[11px] text-text-secondary truncate">
+                        {t('fromClinic', { name: task.clinic.name })} ·{' '}
+                        {formatPatientName(task.patient)} ·{' '}
+                        {t('teethLabel', { teeth: formatToothList(task.teeth) })}
+                      </p>
+                      <p className="text-[11px] text-text-muted truncate">
+                        <span>{t('taskDate', { date: formatTaskDate(task.createdAt) })}</span>
+                        {task.lastStatusChangedBy ? (
+                          <>
+                            <span aria-hidden> · </span>
+                            <span>
+                              {t('lastUpdatedBy', { name: task.lastStatusChangedBy.name })}
+                            </span>
+                          </>
+                        ) : null}
+                      </p>
+                    </div>
+
+                    <div className="flex justify-center">
+                      {canEdit ? (
+                        <select
+                          value={task.status}
+                          disabled={updatingTaskId === task.id}
+                          onChange={(e) =>
+                            void handleStatusUpdate(task.id, e.target.value as LabTaskStatus)
+                          }
+                          className={`${FORM_SELECT_CLASS} w-full max-w-[132px]`}
+                        >
+                          {statusOptions.map((opt) => (
+                            <option key={opt.value} value={opt.value}>
+                              {opt.label}
+                            </option>
+                          ))}
+                        </select>
+                      ) : (
+                        <Badge variant={taskStatusVariant(task.status)} fixedWidth={false}>
+                          {statusOptions.find((opt) => opt.value === task.status)?.label ??
+                            task.status}
+                        </Badge>
                      )}
-                    </p>
+                    </div>
+
+                    <div className="flex items-center gap-1.5 shrink-0 justify-end">
+                      {canEdit ? (
+                        <button
+                          type="button"
+                          onClick={() =>
+                            setExpandedCommentsCaseId(commentsOpen ? null : task.labCaseId)
+                          }
+                          className={`p-1.5 rounded border ${
+                            commentsOpen
+                              ? 'border-primary bg-primary/10 text-primary'
+                              : 'border-border text-text-muted hover:border-primary/40'
+                          }`}
+                          title={t('commentsButton')}
+                        >
+                          <MessageSquare className="h-4 w-4" />
+                        </button>
+                      ) : null}
+                      <TreatmentTypeBadge
+                        type={task.treatmentType}
+                        label={treatmentTypeLabelFromCatalog(task.treatmentType, treatmentCatalog)}
+                      />
+                    </div>
                  </div>

-                  <div className="flex justify-center">
-                    {statusEditable ? (
-                      <select
-                        value={task.status}
-                        disabled={updatingTaskId === task.id}
-                        onChange={(e) =>
-                          void handleStatusUpdate(task.id, e.target.value as LabTaskStatus)
-                        }
-                        className={`${FORM_SELECT_CLASS} w-full max-w-[132px]`}
-                      >
-                        {statusOptions.map((opt) => (
-                          <option key={opt.value} value={opt.value}>
-                            {opt.label}
-                          </option>
-                        ))}
-                      </select>
-                    ) : (
-                      <Badge variant={taskStatusVariant(task.status)} fixedWidth={false}>
-                        {statusOptions.find((opt) => opt.value === task.status)?.label ??
-                          task.status}
-                      </Badge>
-                    )}
-                  </div>
-
-                  <div className="flex items-center gap-1.5 shrink-0 justify-end">
-                    <Badge variant="default" fixedWidth={false}>
-                      {t('priorityLabel', { n: task.priority })}
-                    </Badge>
-                    <TreatmentTypeBadge
-                      type={task.treatmentType}
-                      label={treatmentTypeLabelFromCatalog(task.treatmentType, treatmentCatalog)}
-                    />
-                  </div>
+                  {commentsOpen && canEdit ? (
+                    <div className="px-3 pb-3 border-t border-border/50">
+                      <LabCaseCommentsPanel
+                        caseId={task.labCaseId}
+                        canPost
+                        canToggleVisibility
+                        loadComments={async () => {
+                          const r = await tasksApi.listComments(task.labCaseId);
+                          return r.data;
+                        }}
+                        onPost={async (body, visibleToClinic) => {
+                          const r = await tasksApi.addComment(task.labCaseId, {
+                            body,
+                            visibleToClinic,
+                          });
+                          return r.data;
+                        }}
+                        onToggleVisibility={async (commentId, visible) => {
+                          const r = await tasksApi.setCommentVisibility(commentId, visible);
+                          return r.data;
+                        }}
+                        onError={showError}
+                      />
+                    </div>
+                  ) : null}
                </li>
              );
            })}
--- a/frontend/src/components/ui/lab/LabCaseCommentsPanel.tsx
+++ b/frontend/src/components/ui/lab/LabCaseCommentsPanel.tsx
@@ -0,0 +1,164 @@
+'use client';
+
+import { useCallback, useEffect, useState } from 'react';
+import { useTranslations } from 'next-intl';
+import { Eye, EyeOff } from 'lucide-react';
+import { formatApiErrorMessage } from '@/components/shared/formatApiError';
+import { Button } from '@/components/ui/shared/Button';
+import type { LabCaseComment } from '@/types/cases';
+
+interface LabCaseCommentsPanelProps {
+  caseId: string;
+  canPost: boolean;
+  canToggleVisibility: boolean;
+  loadComments: () => Promise<LabCaseComment[]>;
+  onPost: (body: string, visibleToClinic?: boolean) => Promise<LabCaseComment>;
+  onToggleVisibility?: (commentId: string, visible: boolean) => Promise<LabCaseComment>;
+  onError?: (message: string) => void;
+}
+
+export function LabCaseCommentsPanel({
+  caseId,
+  canPost,
+  canToggleVisibility,
+  loadComments,
+  onPost,
+  onToggleVisibility,
+  onError,
+}: LabCaseCommentsPanelProps) {
+  const t = useTranslations('caseComments');
+  const [comments, setComments] = useState<LabCaseComment[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [posting, setPosting] = useState(false);
+  const [body, setBody] = useState('');
+  const [visibleToClinic, setVisibleToClinic] = useState(false);
+
+  const refresh = useCallback(async () => {
+    setLoading(true);
+    try {
+      const items = await loadComments();
+      setComments(items);
+    } catch (error: unknown) {
+      onError?.(formatApiErrorMessage(error, t('errorLoad')));
+    } finally {
+      setLoading(false);
+    }
+  }, [loadComments, onError, t]);
+
+  useEffect(() => {
+    void refresh();
+  }, [caseId, refresh]);
+
+  async function handlePost() {
+    const trimmed = body.trim();
+    if (!trimmed || !canPost) return;
+    setPosting(true);
+    try {
+      const created = await onPost(trimmed, visibleToClinic);
+      setComments((prev) => [...prev, created]);
+      setBody('');
+      setVisibleToClinic(false);
+    } catch (error: unknown) {
+      onError?.(formatApiErrorMessage(error, t('errorPost')));
+    } finally {
+      setPosting(false);
+    }
+  }
+
+  async function handleToggle(comment: LabCaseComment) {
+    if (!onToggleVisibility || !canToggleVisibility) return;
+    try {
+      const updated = await onToggleVisibility(comment.id, !comment.visibleToClinic);
+      setComments((prev) => prev.map((c) => (c.id === updated.id ? updated : c)));
+    } catch (error: unknown) {
+      onError?.(formatApiErrorMessage(error, t('errorToggle')));
+    }
+  }
+
+  return (
+    <div className="space-y-3">
+      <h4 className="text-sm font-medium text-text-primary">{t('title')}</h4>
+
+      {loading ? (
+        <p className="text-xs text-text-muted">…</p>
+      ) : comments.length === 0 ? (
+        <p className="text-xs text-text-muted">{t('empty')}</p>
+      ) : (
+        <ul className="space-y-2 max-h-48 overflow-y-auto">
+          {comments.map((comment) => (
+            <li
+              key={comment.id}
+              className="rounded-md border border-border bg-background p-2 text-sm"
+            >
+              <div className="flex items-start justify-between gap-2">
+                <div className="min-w-0 flex-1">
+                  <div className="flex flex-wrap items-center gap-x-2 gap-y-0.5 text-[11px] text-text-muted">
+                    <span className="font-medium text-text-secondary">
+                      {comment.authorSide === 'LAB' ? t('labAuthor') : t('clinicAuthor')}
+                      {comment.authorName ? ` · ${comment.authorName}` : ''}
+                    </span>
+                    {comment.visibleToClinic ? (
+                      <span className="text-primary">{t('clinicCanSee')}</span>
+                    ) : (
+                      <span>{t('hiddenFromClinic')}</span>
+                    )}
+                  </div>
+                  <p className="mt-1 text-text-primary whitespace-pre-wrap">{comment.body}</p>
+                </div>
+                {canToggleVisibility && comment.canToggleVisibility && onToggleVisibility ? (
+                  <button
+                    type="button"
+                    onClick={() => void handleToggle(comment)}
+                    className="shrink-0 p-1 rounded hover:bg-border text-text-muted"
+                    title={
+                      comment.visibleToClinic ? t('makeHidden') : t('makeVisible')
+                    }
+                    aria-label={
+                      comment.visibleToClinic ? t('makeHidden') : t('makeVisible')
+                    }
+                  >
+                    {comment.visibleToClinic ? (
+                      <Eye className="h-4 w-4" />
+                    ) : (
+                      <EyeOff className="h-4 w-4" />
+                    )}
+                  </button>
+                ) : null}
+              </div>
+            </li>
+          ))}
+        </ul>
+      )}
+
+      {canPost ? (
+        <div className="space-y-2 border-t border-border pt-2">
+          <textarea
+            value={body}
+            onChange={(e) => setBody(e.target.value)}
+            placeholder={t('placeholder')}
+            rows={2}
+            className="w-full rounded-md border border-border bg-surface px-3 py-2 text-sm resize-none"
+          />
+          {canToggleVisibility ? (
+            <label className="flex items-center gap-2 text-xs text-text-muted cursor-pointer">
+              <input
+                type="checkbox"
+                checked={visibleToClinic}
+                onChange={(e) => setVisibleToClinic(e.target.checked)}
+              />
+              {t('visibleToClinicToggle')}
+            </label>
+          ) : null}
+          <Button
+            type="button"
+            size="sm"
+            disabled={posting || !body.trim()}
+            onClick={() => void handlePost()}
+          >
+            {t('post')}
+          </Button>
+        </div>
+      ) : null}
+    </div>
+  );
+}
--- a/frontend/src/components/ui/organizations/ConnectionCaseHistoryContent.tsx
+++ b/frontend/src/components/ui/organizations/ConnectionCaseHistoryContent.tsx
@@ -12,6 +12,11 @@ import { Badge, type BadgeVariant } from '@/components/ui/shared/Badge';
 import { Button } from '@/components/ui/shared/Button';
 import { SearchBar } from '@/components/ui/shared/SearchBar';
 import { ToastStack } from '@/components/ui/shared/Toast';
+import { LabCaseCommentsPanel } from '@/components/ui/lab/LabCaseCommentsPanel';
+import {
+  formatToothList,
+  prosthesisTypeBadgeStyle,
+} from '@/components/ui/treatment/prosthesisTypeDisplay';
 import type { CounterpartItemDto } from '@/lib/api/organization';
 import type { LabCaseDetail, LabCaseListItem, LabTaskStatus } from '@/types/cases';
 import type { TreatmentCatalogEntry } from '@/types/treatment-catalog';
@@ -109,7 +114,6 @@ export function ConnectionCaseHistoryContent({

  const statusOptions: { value: LabTaskStatus; label: string }[] = useMemo(
    () => [
-      { value: 'PENDING', label: tCases('statusPending') },
      { value: 'IN_PROGRESS', label: tCases('statusInProgress') },
      { value: 'COMPLETED', label: tCases('statusCompleted') },
    ],
@@ -363,17 +367,24 @@ export function ConnectionCaseHistoryContent({
                {selectedCase.tasksByTooth.length === 0 ? (
                  <p className="text-sm text-text-muted">{tCases('noTasks')}</p>
                ) : (
-                  selectedCase.tasksByTooth.map((group) => (
+                  selectedCase.tasksByTooth.map((group, groupIndex) => (
                    <div
-                      key={`${group.tooth}-${group.treatmentType}`}
+                      key={`${group.treatmentDetailId}-${group.prosthesisTypeCode}`}
                      className="rounded-md border border-border p-3 space-y-2"
                    >
-                      <div className="text-sm font-medium text-text-primary">
-                        {tCases('toothGroupTitle', {
-                          tooth: group.tooth,
-                          prosthesis: group.prosthesisTypeLabel,
-                          type: treatmentLabel(group.treatmentType),
-                        })}
+                      <div className="flex flex-wrap items-center gap-2">
+                        <span
+                          className="inline-flex items-center rounded px-2 py-0.5 text-xs font-medium border"
+                          style={prosthesisTypeBadgeStyle(group.prosthesisTypeCode, groupIndex)}
+                        >
+                          {group.prosthesisTypeLabel}
+                        </span>
+                        <span className="text-sm font-medium text-text-primary">
+                          {tCases('toothGroupTitle', {
+                            teeth: formatToothList(group.teeth),
+                            prosthesis: group.prosthesisTypeLabel,
+                          })}
+                        </span>
                      </div>
                      <ul className="space-y-2">
                        {group.tasks.map((task) => (
@@ -388,6 +399,11 @@ export function ConnectionCaseHistoryContent({
                              {statusOptions.find((opt) => opt.value === task.status)?.label ??
                                task.status}
                            </Badge>
+                            {task.lastStatusChangedBy ? (
+                              <span className="text-[11px] text-text-muted">
+                                {tCases('lastUpdatedBy', { name: task.lastStatusChangedBy.name })}
+                              </span>
+                            ) : null}
                          </li>
                        ))}
                      </ul>
@@ -395,6 +411,30 @@ export function ConnectionCaseHistoryContent({
                  ))
                )}
              </div>
+
+              {isClinic && selectedCaseId ? (
+                <LabCaseCommentsPanel
+                  caseId={selectedCaseId}
+                  canPost
+                  canToggleVisibility={false}
+                  loadComments={async () => {
+                    const r = await organizationApi.listConnectionCaseComments(
+                      connection.id,
+                      selectedCaseId,
+                    );
+                    return r.data;
+                  }}
+                  onPost={async (body) => {
+                    const r = await organizationApi.addConnectionCaseComment(
+                      connection.id,
+                      selectedCaseId,
+                      body,
+                    );
+                    return r.data;
+                  }}
+                  onError={showError}
+                />
+              ) : null}
            </div>
          )}
        </section>
--- a/frontend/src/components/ui/treatment/TreatmentWorkspace.tsx
+++ b/frontend/src/components/ui/treatment/TreatmentWorkspace.tsx
@@ -69,6 +69,27 @@ function labCaseDraftsToPast(
  }));
 }

+function enrichDetailsWithLabSendState(
+  details: TreatmentDetailDraft[],
+  labCaseDrafts: LabCaseDraft[],
+): TreatmentDetailDraft[] {
+  return details.map((detail) => {
+    const sentLabCase = labCaseDrafts.find(
+      (lc) => lc.sentAt && lc.detailClientIds.includes(detail.clientId),
+    );
+    if (!sentLabCase) return detail;
+    return {
+      ...detail,
+      labCaseId: sentLabCase.id ?? detail.labCaseId,
+      sentAt: sentLabCase.sentAt ?? detail.sentAt,
+      sends: sentLabCase.sends ?? detail.sends,
+      sendToOrganizationIds: sentLabCase.destinationOrganizationId
+        ? [sentLabCase.destinationOrganizationId]
+        : detail.sendToOrganizationIds,
+    };
+  });
+}
+
 function buildWorkspaceSnapshot(
  appointment: TreatmentAppointment,
  details: TreatmentDetailDraft[],
@@ -76,8 +97,9 @@ function buildWorkspaceSnapshot(
  title: string,
  id?: string,
 ): PastTreatment {
+  const detailsForPreview = enrichDetailsWithLabSendState(details, labCaseDrafts);
  return {
-    ...detailsToPreviewTreatment(details, {
+    ...detailsToPreviewTreatment(detailsForPreview, {
      id: id ?? `preview-${appointment.id}`,
      title,
      patientId: appointment.patientId,
@@ -844,6 +866,22 @@ export function TreatmentWorkspace({ userId, currentOrganization }: TreatmentWor

        const response = await treatmentsApi.sendLabCase(refreshedLabCase.id);

+        const sentDetailClientIds = new Set(labCase.detailClientIds);
+        setDetails((prev) =>
+          prev.map((detail) => {
+            if (!sentDetailClientIds.has(detail.clientId)) return detail;
+            return {
+              ...detail,
+              labCaseId: response.data.id,
+              sentAt: response.data.sentAt,
+              sends: response.data.sends,
+              sendToOrganizationIds: response.data.destinationOrganizationId
+                ? [response.data.destinationOrganizationId]
+                : detail.sendToOrganizationIds,
+            };
+          }),
+        );
+
        setLabCaseDrafts((prev) =>
          prev.map((lc) =>
            lc.clientId === labCase.clientId
--- a/frontend/src/components/ui/treatment/prosthesisTypeDisplay.ts
+++ b/frontend/src/components/ui/treatment/prosthesisTypeDisplay.ts
@@ -0,0 +1,72 @@
+import type { CSSProperties } from 'react';
+
+/**
+ * Prosthesis-type colors for lab-facing surfaces (Tasks list, Cases detail group
+ * headers / badges). Grouped by material family, loosely inspired by exocad's
+ * material color conventions:
+ *   - Zirconia family  → pale green/cream
+ *   - PFM / full metal → steel gray
+ *   - Glass-ceramic / IPS (press & CAD) → warm amber
+ *   - Resin / PMMA / PEEK / temporary → mint/teal
+ *   - Abutments / screw-retained → slate blue
+ *   - Smile design / mockup → lavender/pink
+ *
+ * Clinic-facing dispatch flows intentionally do NOT use these colors.
+ */
+const PROSTHESIS_TYPE_COLORS: Record<string, string> = {
+  // Zirconia family
+  monolithic_zirconia: '#d9f2e6',
+  pfz_crown: '#c7ede0',
+  veneer_zirconia: '#b8e6d5',
+  zirconia_abutment: '#a7dcc8',
+  zirconia_overlay: '#cdeede',
+  // PFM / metal
+  pfm_crown: '#cbd5e1',
+  full_metal_crown: '#b8c2cf',
+  // Glass-ceramic / IPS
+  glass_ceramic_crown: '#fde3a7',
+  veneer_ips_press: '#fcd88f',
+  veneer_ips_cad: '#f9cf9c',
+  ips_overlay: '#fbe0b0',
+  // Resin / PMMA / PEEK / temporary
+  temporary_resin_crown: '#bfeaf0',
+  pmma: '#a9e2ea',
+  peek_crown: '#b7e4dd',
+  soft_structure: '#d4eef0',
+  // Abutments / screw-retained
+  customized_abutment: '#aec6e8',
+  prefabricated_abutment: '#9db8e0',
+  ti_base_abutment: '#c0d0ec',
+  multi_unit_abutment: '#b4c4e6',
+  screw_retained: '#a8bce2',
+  // Design / mockup
+  smile_design: '#e9d5ff',
+  mockup: '#f5d0fe',
+};
+
+const FALLBACK_COLORS = ['#ddd6fe', '#fed7aa', '#fecaca', '#bae6fd', '#d9f99d', '#fbcfe8'];
+
+/** Dark ink that stays readable on every pastel in the palette. */
+const BADGE_INK = '#14253d';
+
+export function prosthesisTypeColor(code: string, index = 0): string {
+  return PROSTHESIS_TYPE_COLORS[code] ?? FALLBACK_COLORS[index % FALLBACK_COLORS.length];
+}
+
+/** Filled swatch (small indicator dots). */
+export function prosthesisTypeSwatchStyle(code: string, index = 0): CSSProperties {
+  return { backgroundColor: prosthesisTypeColor(code, index), borderColor: 'rgba(0, 0, 0, 0.18)' };
+}
+
+/** Pastel pill / banner fill with readable dark text (group headers, badges). */
+export function prosthesisTypeBadgeStyle(code: string, index = 0): CSSProperties {
+  return {
+    backgroundColor: prosthesisTypeColor(code, index),
+    borderColor: 'rgba(0, 0, 0, 0.16)',
+    color: BADGE_INK,
+  };
+}
+
+export function formatToothList(teeth: string[]): string {
+  return teeth.join(', ');
+}
--- a/frontend/src/lib/api/cases.ts
+++ b/frontend/src/lib/api/cases.ts
@@ -1,6 +1,5 @@
 import { apiClient } from './client';
 import type {
-  AssignableMember,
  CasesFilterOptions,
  LabCaseDetail,
  LabCaseTask,
@@ -21,22 +20,17 @@ export const casesApi = {
    return response.data;
  },

-  listAssignableMembers: async (): Promise<{ success: boolean; data: AssignableMember[] }> => {
-    const response = await apiClient.get('/cases/assignable-members');
-    return response.data;
-  },
-
  listFilterOptions: async (): Promise<{ success: boolean; data: CasesFilterOptions }> => {
    const response = await apiClient.get('/cases/filter-options');
    return response.data;
  },

-  updateTask: async (
+  setTaskImportant: async (
    caseId: string,
    taskId: string,
-    payload: { assigneeUserId?: string | null; priority?: number },
+    isImportant: boolean,
  ): Promise<{ success: boolean; data: LabCaseTask }> => {
-    const response = await apiClient.patch(`/cases/${caseId}/tasks/${taskId}`, payload);
+    const response = await apiClient.patch(`/cases/${caseId}/tasks/${taskId}`, { isImportant });
    return response.data;
  },
 };
--- a/frontend/src/lib/api/organization.ts
+++ b/frontend/src/lib/api/organization.ts
@@ -1,5 +1,6 @@
 import { apiClient } from './client';
 import type {
+  LabCaseComment,
  LabCaseDetail,
  ListLabCasesParams,
  PaginatedLabCases,
@@ -161,4 +162,26 @@ export const organizationApi = {
    );
    return response.data;
  },
+
+  listConnectionCaseComments: async (
+    connectionId: string,
+    caseId: string,
+  ): Promise<{ success: boolean; data: LabCaseComment[] }> => {
+    const response = await apiClient.get(
+      `/organizations/connections/${connectionId}/cases/${caseId}/comments`,
+    );
+    return response.data;
+  },
+
+  addConnectionCaseComment: async (
+    connectionId: string,
+    caseId: string,
+    body: string,
+  ): Promise<{ success: boolean; data: LabCaseComment }> => {
+    const response = await apiClient.post(
+      `/organizations/connections/${connectionId}/cases/${caseId}/comments`,
+      { body },
+    );
+    return response.data;
+  },
 };
--- a/frontend/src/lib/api/tasks.ts
+++ b/frontend/src/lib/api/tasks.ts
@@ -1,11 +1,16 @@
 import { apiClient } from './client';
-import type { LabTaskListItem, LabTaskStatus, PaginatedLabTasks } from '@/types/cases';
+import type {
+  LabCaseComment,
+  LabTaskListItem,
+  LabTaskStatus,
+  ListLabTasksParams,
+  PaginatedLabTasks,
+} from '@/types/cases';

 export const tasksApi = {
-  list: async (params: { page?: number; limit?: number } = {}): Promise<{
-    success: boolean;
-    data: PaginatedLabTasks;
-  }> => {
+  list: async (
+    params: ListLabTasksParams = {},
+  ): Promise<{ success: boolean; data: PaginatedLabTasks }> => {
    const response = await apiClient.get('/tasks', { params });
    return response.data;
  },
@@ -17,4 +22,29 @@ export const tasksApi = {
    const response = await apiClient.patch(`/tasks/${taskId}`, { status });
    return response.data;
  },
+
+  listComments: async (
+    caseId: string,
+  ): Promise<{ success: boolean; data: LabCaseComment[] }> => {
+    const response = await apiClient.get(`/case-comments/${caseId}`);
+    return response.data;
+  },
+
+  addComment: async (
+    caseId: string,
+    payload: { body: string; visibleToClinic?: boolean },
+  ): Promise<{ success: boolean; data: LabCaseComment }> => {
+    const response = await apiClient.post(`/case-comments/${caseId}`, payload);
+    return response.data;
+  },
+
+  setCommentVisibility: async (
+    commentId: string,
+    visibleToClinic: boolean,
+  ): Promise<{ success: boolean; data: LabCaseComment }> => {
+    const response = await apiClient.patch(`/case-comments/item/${commentId}/visibility`, {
+      visibleToClinic,
+    });
+    return response.data;
+  },
 };
--- a/frontend/src/types/cases.ts
+++ b/frontend/src/types/cases.ts
@@ -1,4 +1,4 @@
-export type LabTaskStatus = 'PENDING' | 'IN_PROGRESS' | 'COMPLETED';
+export type LabTaskStatus = 'IN_PROGRESS' | 'COMPLETED';

 export interface LabCaseListItem {
  id: string;
@@ -14,9 +14,23 @@ export interface LabCaseListItem {
  taskProgress: { completed: number; total: number };
 }

+export interface LabTaskUser {
+  id: string;
+  name: string;
+}
+
+export interface LabTaskTimelineEvent {
+  id: string;
+  fromStatus: LabTaskStatus | null;
+  toStatus: LabTaskStatus;
+  changedAt: string;
+  changedBy: LabTaskUser | null;
+}
+
 export interface LabCaseTask {
  id: string;
-  tooth: string;
+  treatmentDetailId: string;
+  teeth: string[];
  treatmentType: string;
  prosthesisTypeCode: string;
  prosthesisTypeLabel: string;
@@ -24,21 +38,33 @@ export interface LabCaseTask {
  stepOrder: number;
  stepLabel: string;
  status: LabTaskStatus;
-  priority: number;
-  assignedAt: string | null;
+  isImportant: boolean;
  createdAt: string;
-  assigneeUserId: string | null;
-  assignee: { id: string; name: string; email: string } | null;
+  lastStatusChangedAt: string | null;
+  lastStatusChangedBy: LabTaskUser | null;
+  timeline: LabTaskTimelineEvent[];
 }

-export interface LabCaseTasksByTooth {
-  tooth: string;
+export interface LabCaseTaskGroup {
+  treatmentDetailId: string;
+  teeth: string[];
  treatmentType: string;
  prosthesisTypeCode: string;
  prosthesisTypeLabel: string;
  tasks: LabCaseTask[];
 }

+export interface LabCaseComment {
+  id: string;
+  body: string;
+  authorSide: 'LAB' | 'CLINIC';
+  authorName: string | null;
+  authorOrganizationName: string | null;
+  visibleToClinic: boolean;
+  createdAt: string;
+  canToggleVisibility: boolean;
+}
+
 export interface LabCaseDetail {
  id: string;
  sentAt: string | null;
@@ -64,17 +90,10 @@ export interface LabCaseDetail {
    sentAt: string;
  }>;
  tasks: LabCaseTask[];
-  tasksByTooth: LabCaseTasksByTooth[];
+  tasksByTooth: LabCaseTaskGroup[];
  taskProgress: { completed: number; total: number };
 }

-export interface AssignableMember {
-  userId: string;
-  name: string;
-  email: string;
-  isOwner: boolean;
-}
-
 export interface ListLabCasesParams {
  q?: string;
  page?: number;
@@ -100,21 +119,38 @@ export interface PaginatedLabCases {
  };
 }

+export type TaskSortField = 'date' | 'status' | 'clinic' | 'patient' | 'important';
+
+export interface ListLabTasksParams {
+  q?: string;
+  clinicOrganizationId?: string;
+  status?: LabTaskStatus;
+  completed?: boolean;
+  important?: boolean;
+  sentFrom?: string;
+  sentTo?: string;
+  sortBy?: TaskSortField;
+  sortDir?: 'asc' | 'desc';
+  page?: number;
+  limit?: number;
+}
+
 export interface LabTaskListItem {
  id: string;
  labCaseId: string;
-  tooth: string;
+  treatmentDetailId: string;
+  teeth: string[];
  treatmentType: string;
  prosthesisTypeCode: string;
  prosthesisTypeLabel: string;
+  workflowStepCode: string;
  stepOrder: number;
  stepLabel: string;
  status: LabTaskStatus;
-  priority: number;
-  assignedAt: string | null;
+  isImportant: boolean;
+  lastStatusChangedAt: string | null;
+  lastStatusChangedBy: LabTaskUser | null;
  createdAt: string;
-  assigneeUserId: string | null;
-  assignee: { id: string; name: string; email: string } | null;
  clinic: { id: string; name: string };
  patient: { id: string; firstName: string; lastName: string };
 }