diff --git a/frontend/src/app/(dashboard)/staff/page.tsx b/frontend/src/app/(dashboard)/staff/page.tsx
index ea9e9e9..71adcf0 100644
--- a/frontend/src/app/(dashboard)/staff/page.tsx
+++ b/frontend/src/app/(dashboard)/staff/page.tsx
@@ -15,7 +15,7 @@ import {
   resolveStaffFeatureLabel,
   formatAccessSummary,
   type FeaturePermState,
-} from './staff-permission-form';
+} from '../../../components/staff/staff-permission-form';
 import { Pencil, Trash2, Copy, Check, X } from 'lucide-react';
 import { useAuth } from '@/lib/hooks/useAuth';
 import { staffApi, type StaffMemberDto } from '@/lib/api/staff';
diff --git a/frontend/src/app/(dashboard)/treatment/page.tsx b/frontend/src/app/(dashboard)/treatment/page.tsx
index efca58d..1014b41 100644
--- a/frontend/src/app/(dashboard)/treatment/page.tsx
+++ b/frontend/src/app/(dashboard)/treatment/page.tsx
@@ -1,10 +1,18 @@
+'use client';
+
+import { TreatmentWorkspace } from '@/components/ui/treatment/TreatmentWorkspace';
+import { useAuth } from '@/lib/hooks/useAuth';
+
 export default function TreatmentPage() {
+  const { user, currentOrganization, isAuthReady } = useAuth();
+
+  if (!isAuthReady || !user) {
+    return (
+      <div className="text-sm text-text-muted">Loading…</div>
+    );
+  }
+
   return (
-    <div className="space-y-3">
-      <h1 className="text-2xl font-semibold text-text-primary">Treatment</h1>
-      <p className="text-sm text-text-secondary">
-        Treatment module is coming soon.
-      </p>
-    </div>
+    <TreatmentWorkspace userId={user.id} currentOrganization={currentOrganization} />
   );
 }
diff --git a/frontend/src/app/(dashboard)/staff/staff-permission-form.ts b/frontend/src/components/staff/staff-permission-form.ts
similarity index 100%
rename from frontend/src/app/(dashboard)/staff/staff-permission-form.ts
rename to frontend/src/components/staff/staff-permission-form.ts
diff --git a/frontend/src/app/(dashboard)/staff/components/staffPermissions.ts b/frontend/src/components/staff/staffPermissions.ts
similarity index 100%
rename from frontend/src/app/(dashboard)/staff/components/staffPermissions.ts
rename to frontend/src/components/staff/staffPermissions.ts
diff --git a/frontend/src/components/treatment/fdiToothMeta.ts b/frontend/src/components/treatment/fdiToothMeta.ts
new file mode 100644
index 0000000..cd3b0a9
--- /dev/null
+++ b/frontend/src/components/treatment/fdiToothMeta.ts
@@ -0,0 +1,24 @@
+import type { FdiToothId } from '@/types/treatment';
+
+/** Upper arch: distal → mesial on each side (full occlusal layout left → right) */
+export const FDI_UPPER_LEFT_TO_RIGHT: FdiToothId[] = [
+  '18', '17', '16', '15', '14', '13', '12', '11',
+  '21', '22', '23', '24', '25', '26', '27', '28',
+];
+
+/** Lower arch */
+export const FDI_LOWER_LEFT_TO_RIGHT: FdiToothId[] = [
+  '48', '47', '46', '45', '44', '43', '42', '41',
+  '31', '32', '33', '34', '35', '36', '37', '38',
+];
+
+export type ToothShapeKind = 'incisor' | 'canine' | 'premolar' | 'molar';
+
+/** Infer cartoon shape from FDI (last digit encodes tooth type within quadrant). */
+export function getToothShapeKind(fdi: FdiToothId): ToothShapeKind {
+  const n = Number(fdi.slice(1));
+  if (n <= 2) return 'incisor';
+  if (n === 3) return 'canine';
+  if (n <= 5) return 'premolar';
+  return 'molar';
+}
diff --git a/frontend/src/components/ui/appointments/AppointmentBookingModal.tsx b/frontend/src/components/ui/appointments/AppointmentBookingModal.tsx
index 0c9a8ac..d5f4903 100644
--- a/frontend/src/components/ui/appointments/AppointmentBookingModal.tsx
+++ b/frontend/src/components/ui/appointments/AppointmentBookingModal.tsx
@@ -4,7 +4,7 @@ import { useEffect, useState } from 'react';
 import { X } from 'lucide-react';
 import { Button } from '@/components/ui/common/Button';
 import { Dropdown } from '@/components/ui/common/Dropdown';
-import { APPOINTMENT_PURPOSES, type AppointmentPurpose } from '@/types/appointment';
+import type { AppointmentPurpose } from '@/types/appointment';
 import { APPOINTMENT_PURPOSE_LABEL } from '@/components/ui/appointments/appointmentPurposeStyles';
 import type { Patient } from '@/types/patient';
 import {
@@ -46,6 +46,16 @@ export function AppointmentBookingModal({
   const [endTime, setEndTime] = useState('10:00');
   const [purpose, setPurpose] = useState<AppointmentPurpose>('consultation');
   const [error, setError] = useState('');
+  const purposeTextColor =
+    purpose === 'consultation'
+      ? '#ddd6fe'
+      : purpose === 'filling'
+        ? '#fed7aa'
+        : purpose === 'endo'
+          ? '#fecaca'
+          : purpose === 'visit'
+            ? '#bae6fd'
+            : '#d9f99d';
 
   useEffect(() => {
     if (!open) {
@@ -175,12 +185,23 @@ export function AppointmentBookingModal({
           label="Purpose"
           value={purpose}
           onChange={(e) => setPurpose(e.target.value as AppointmentPurpose)}
+          style={{ color: purposeTextColor }}
         >
-          {APPOINTMENT_PURPOSES.map((p) => (
-            <option key={p} value={p}>
-              {APPOINTMENT_PURPOSE_LABEL[p]}
-            </option>
-          ))}
+          <option value="consultation" style={{ color: '#ddd6fe', backgroundColor: '#14253d' }}>
+            {APPOINTMENT_PURPOSE_LABEL.consultation}
+          </option>
+          <option value="filling" style={{ color: '#fed7aa', backgroundColor: '#14253d' }}>
+            {APPOINTMENT_PURPOSE_LABEL.filling}
+          </option>
+          <option value="endo" style={{ color: '#fecaca', backgroundColor: '#14253d' }}>
+            {APPOINTMENT_PURPOSE_LABEL.endo}
+          </option>
+          <option value="visit" style={{ color: '#bae6fd', backgroundColor: '#14253d' }}>
+            {APPOINTMENT_PURPOSE_LABEL.visit}
+          </option>
+          <option value="hygiene" style={{ color: '#d9f99d', backgroundColor: '#14253d' }}>
+            {APPOINTMENT_PURPOSE_LABEL.hygiene}
+          </option>
         </Dropdown>
 
         {error && <p className="text-sm text-red-400">{error}</p>}
diff --git a/frontend/src/components/ui/treatment/AppointmentsStrip.tsx b/frontend/src/components/ui/treatment/AppointmentsStrip.tsx
new file mode 100644
index 0000000..4b06018
--- /dev/null
+++ b/frontend/src/components/ui/treatment/AppointmentsStrip.tsx
@@ -0,0 +1,114 @@
+'use client';
+
+import { CalendarDays } from 'lucide-react';
+import { purposeStyle } from '@/components/ui/appointments/appointmentPurposeStyles';
+import { ScheduleDayPicker } from '@/components/ui/common/ScheduleDayPicker';
+import { startOfLocalDay } from '@/lib/appointmentTime';
+import type { TreatmentAppointment } from '@/types/treatment';
+
+interface AppointmentsStripProps {
+  stripHidden: boolean;
+  onToggleStripHidden: () => void;
+  selectedDay: Date;
+  onSelectDay: (day: Date) => void;
+  /** Same lower bound as Appointments schedule (cannot pick days before this). */
+  minScheduleDate: Date;
+  appointments: TreatmentAppointment[];
+  selectedAppointmentId: string | null;
+  onSelectAppointment: (id: string) => void;
+  loading?: boolean;
+}
+
+export function AppointmentsStrip({
+  stripHidden,
+  onToggleStripHidden,
+  selectedDay,
+  onSelectDay,
+  minScheduleDate,
+  appointments,
+  selectedAppointmentId,
+  onSelectAppointment,
+  loading = false,
+}: AppointmentsStripProps) {
+  if (stripHidden) {
+    return (
+      <div className="surface-card p-3 flex items-center justify-between gap-3 flex-wrap">
+        <p className="text-sm text-text-secondary">Appointments are hidden.</p>
+        <button
+          type="button"
+          onClick={onToggleStripHidden}
+          className="text-sm font-medium text-primary hover:underline focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 rounded-[var(--radius-sm)]"
+        >
+          Show appointments
+        </button>
+      </div>
+    );
+  }
+
+  return (
+    <div className="surface-card p-4 space-y-4">
+      <div className="flex items-center justify-between gap-3 flex-wrap">
+        <div className="flex items-center gap-2 min-w-0">
+          <CalendarDays className="w-5 h-5 text-text-muted shrink-0 icon-flat" aria-hidden />
+          <h2 className="text-sm font-semibold text-text-primary truncate">My appointments</h2>
+        </div>
+        <button
+          type="button"
+          onClick={onToggleStripHidden}
+          className="text-sm font-medium text-primary hover:underline focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 rounded-[var(--radius-sm)]"
+        >
+          Hide appointments
+        </button>
+      </div>
+
+      <div className="flex flex-col sm:flex-row sm:items-end gap-4 sm:justify-between">
+        <ScheduleDayPicker
+          value={selectedDay}
+          minDate={minScheduleDate}
+          onChange={(d) => onSelectDay(startOfLocalDay(d))}
+        />
+        {loading && (
+          <p className="text-sm text-text-muted pb-2">Loading appointments…</p>
+        )}
+      </div>
+
+      <div className="flex flex-wrap gap-2">
+        {appointments.length === 0 && (
+          <p className="text-sm text-text-muted">No appointments assigned to you on this day.</p>
+        )}
+        {appointments.map((a) => {
+          const sel = a.id === selectedAppointmentId;
+          const start = new Date(a.startAt);
+          const end = new Date(a.endAt);
+          const timeLabel = `${start.toLocaleTimeString(undefined, {
+            hour: 'numeric',
+            minute: '2-digit',
+          })} – ${end.toLocaleTimeString(undefined, {
+            hour: 'numeric',
+            minute: '2-digit',
+          })}`;
+          const palette = purposeStyle(a.purpose);
+          return (
+            <button
+              key={a.id}
+              type="button"
+              onClick={() => onSelectAppointment(a.id)}
+              className={`
+                text-left rounded-[var(--radius-sm)] border px-3 py-2 min-w-[200px] max-w-[280px] transition-shadow min-h-[52px]
+                focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/45
+                ${palette}
+                ${sel ? 'ring-2 ring-primary ring-offset-2 ring-offset-background-secondary shadow-[inset_0_1px_0_rgba(255,255,255,0.06)]' : 'hover:brightness-110'}
+              `}
+            >
+              <p className="text-[11px] font-medium tabular-nums opacity-95">{timeLabel}</p>
+              <p className="text-sm font-medium leading-tight truncate mt-0.5">
+                {a.patientFirstName} {a.patientLastName}
+              </p>
+              <p className="text-[11px] opacity-90 capitalize mt-0.5">{a.purpose}</p>
+            </button>
+          );
+        })}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/ui/treatment/FdiToothChart.tsx b/frontend/src/components/ui/treatment/FdiToothChart.tsx
new file mode 100644
index 0000000..5857f48
--- /dev/null
+++ b/frontend/src/components/ui/treatment/FdiToothChart.tsx
@@ -0,0 +1,225 @@
+'use client';
+
+import { useId } from 'react';
+import { FDI_LOWER_LEFT_TO_RIGHT, FDI_UPPER_LEFT_TO_RIGHT, getToothShapeKind } from '@/components/treatment/fdiToothMeta';
+import { ToothGlyph } from '@/components/ui/treatment/ToothGlyph';
+import type { FdiToothId } from '@/types/treatment';
+
+const TOOTH_NUMBER_GAP = 'mt-1';
+
+/** Six teeth each side of the midline (anteriors): slightly larger glyph + wrapper. */
+const MIDLINE_SIX = new Set<FdiToothId>([
+  '13', '12', '11', '21', '22', '23',
+  '43', '42', '41', '31', '32', '33',
+]);
+
+function quadrantMirrored(fdi: FdiToothId): boolean {
+  const q = fdi[0];
+  return q === '2' || q === '3';
+}
+
+interface FdiToothChartProps {
+  selected: ReadonlySet<FdiToothId>;
+  onToggle: (fdi: FdiToothId) => void;
+  disabled?: boolean;
+}
+
+export function FdiToothChart({ selected, onToggle, disabled }: FdiToothChartProps) {
+  const uid = useId().replace(/:/g, '');
+  const archPeak = 10;
+
+  const TOOTH_TWEAKS: Record<FdiToothId, { glyph: string; offset: number; rotate: number }> = {
+    '18': { glyph: 'w-[1.98rem] h-[4.65rem]', offset: 7, rotate: -11 },
+    '17': { glyph: 'w-[2rem] h-[4.75rem]', offset: 8, rotate: -8 },
+    '16': { glyph: 'w-[2.1rem] h-[4.95rem]', offset: 9, rotate: -6 },
+    '15': { glyph: 'w-[1.8rem] h-[4.8rem]', offset: 9, rotate: -4 },
+    '14': { glyph: 'w-[1.8rem] h-[4.85rem]', offset: 9, rotate: -2 },
+    '13': { glyph: 'w-[1.9rem] h-[5.28rem]', offset: 8, rotate: -1 },
+    '12': { glyph: 'w-[1.8rem] h-[5.02rem]', offset: 7, rotate: -1 },
+    '11': { glyph: 'w-[1.8rem] h-[5.08rem]', offset: 7, rotate: -0.5 },
+    '21': { glyph: 'w-[1.8rem] h-[5.08rem]', offset: 7, rotate: 0.5 },
+    '22': { glyph: 'w-[1.8rem] h-[5.02rem]', offset: 7, rotate: 1 },
+    '23': { glyph: 'w-[1.9rem] h-[5.28rem]', offset: 8, rotate: 1 },
+    '24': { glyph: 'w-[1.8rem] h-[4.85rem]', offset: 9, rotate: 2 },
+    '25': { glyph: 'w-[1.8rem] h-[4.8rem]', offset: 9, rotate: 4 },
+    '26': { glyph: 'w-[2.1rem] h-[4.95rem]', offset: 9, rotate: 6 },
+    '27': { glyph: 'w-[2rem] h-[4.75rem]', offset: 8, rotate: 8 },
+    '28': { glyph: 'w-[1.98rem] h-[4.65rem]', offset: 7, rotate: 11 },
+
+    '48': { glyph: 'w-[1.98rem] h-[4.7rem]', offset: -7, rotate: -11 },
+    '47': { glyph: 'w-[2rem] h-[4.8rem]', offset: -8, rotate: -8 },
+    '46': { glyph: 'w-[2.15rem] h-[5rem]', offset: -9, rotate: -6 },
+    '45': { glyph: 'w-[1.82rem] h-[4.85rem]', offset: -9, rotate: -4 },
+    '44': { glyph: 'w-[1.82rem] h-[4.9rem]', offset: -9, rotate: -2 },
+    '43': { glyph: 'w-[1.88rem] h-[5.34rem]', offset: -8, rotate: -1 },
+    '42': { glyph: 'w-[1.76rem] h-[5.04rem]', offset: -7, rotate: -1 },
+    '41': { glyph: 'w-[1.74rem] h-[4.98rem]', offset: -7, rotate: -0.5 },
+    '31': { glyph: 'w-[1.74rem] h-[4.98rem]', offset: -7, rotate: 0.5 },
+    '32': { glyph: 'w-[1.76rem] h-[5.04rem]', offset: -7, rotate: 1 },
+    '33': { glyph: 'w-[1.88rem] h-[5.34rem]', offset: -8, rotate: 1 },
+    '34': { glyph: 'w-[1.82rem] h-[4.9rem]', offset: -9, rotate: 2 },
+    '35': { glyph: 'w-[1.82rem] h-[4.85rem]', offset: -9, rotate: 4 },
+    '36': { glyph: 'w-[2.15rem] h-[5rem]', offset: -9, rotate: 6 },
+    '37': { glyph: 'w-[2rem] h-[4.8rem]', offset: -8, rotate: 8 },
+    '38': { glyph: 'w-[1.98rem] h-[4.7rem]', offset: -7, rotate: 11 },
+  };
+
+  const toothSizeClass = (fdi: FdiToothId) => {
+    const kind = getToothShapeKind(fdi);
+    const mid = MIDLINE_SIX.has(fdi);
+    switch (kind) {
+      case 'incisor':
+        return mid
+          ? { wrapper: 'w-[2.1rem]', glyph: 'w-[1.68rem] h-[4.78rem]' }
+          : { wrapper: 'w-[2rem]', glyph: 'w-[1.6rem] h-[4.6rem]' };
+      case 'canine':
+        return mid
+          ? { wrapper: 'w-[2.2rem]', glyph: 'w-[1.78rem] h-[5.05rem]' }
+          : { wrapper: 'w-[2.1rem]', glyph: 'w-[1.7rem] h-[4.9rem]' };
+      case 'premolar':
+        return mid
+          ? { wrapper: 'w-[2.34rem]', glyph: 'w-[1.93rem] h-[5.02rem]' }
+          : { wrapper: 'w-[2.25rem]', glyph: 'w-[1.85rem] h-[4.85rem]' };
+      case 'molar':
+        return mid
+          ? { wrapper: 'w-[2.52rem]', glyph: 'w-[2.12rem] h-[5.1rem]' }
+          : { wrapper: 'w-[2.45rem]', glyph: 'w-[2.05rem] h-[4.95rem]' };
+      default:
+        return { wrapper: 'w-[2.25rem]', glyph: 'w-[1.85rem] h-[4.85rem]' };
+    }
+  };
+
+  const archOffset = (index: number, count: number, upper?: boolean) => {
+    const center = (count - 1) / 2;
+    const dist = Math.abs(index - center) / center;
+    const curve = (1 - Math.pow(dist, 1.45)) * archPeak;
+    return upper ? curve : -curve;
+  };
+
+  const archRotate = (index: number, count: number) => {
+    const center = (count - 1) / 2;
+    const normalized = (index - center) / center;
+    return normalized * 6;
+  };
+
+  const Row = ({ teeth, upper }: { teeth: FdiToothId[]; upper?: boolean }) => (
+    <div className="flex flex-wrap justify-center gap-x-1 gap-y-1">
+      {teeth.map((fdi, i) => {
+        const kind = getToothShapeKind(fdi);
+        const gid = `${uid}-g-${fdi}-${i}`;
+        const isSel = selected.has(fdi);
+        const size = toothSizeClass(fdi);
+        const tweak = TOOTH_TWEAKS[fdi];
+        const offsetY = tweak ? tweak.offset : archOffset(i, teeth.length, upper);
+        const rotate = tweak ? tweak.rotate : archRotate(i, teeth.length);
+        const alignItems = upper ? 'items-end' : 'items-start';
+        return (
+          <div key={fdi} className={`flex flex-col items-center ${size.wrapper}`}>
+            <div className={`h-[5.9rem] flex ${alignItems} justify-center`}>
+              <button
+                type="button"
+                disabled={disabled}
+                onClick={() => onToggle(fdi)}
+                style={{ transform: `translateY(${offsetY}px) rotate(${rotate}deg)` }}
+                className={`
+                  rounded-[var(--radius-sm)] p-0.5 transition-transform
+                  focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/50
+                  ${disabled ? 'opacity-50 cursor-not-allowed' : 'hover:scale-105 active:scale-95'}
+                `}
+                aria-pressed={isSel}
+                aria-label={`FDI tooth ${fdi}${isSel ? ', selected' : ''}`}
+              >
+                <ToothGlyph
+                  fdi={fdi}
+                  kind={kind}
+                  gradientId={gid}
+                  selected={isSel}
+                  upper={upper}
+                  mirrored={quadrantMirrored(fdi)}
+                  upsideDown={upper}
+                  className={tweak?.glyph ?? size.glyph}
+                />
+              </button>
+            </div>
+          </div>
+        );
+      })}
+    </div>
+  );
+
+  return (
+    <div className="surface-card p-4 space-y-6">
+      <div className="flex flex-col gap-3 sm:flex-row sm:items-start sm:justify-between">
+        <div>
+          <h3 className="text-sm font-semibold text-text-primary">FDI tooth chart</h3>
+          <p className="text-xs text-text-muted mt-0.5">
+            Tap teeth to multi-select (FDI). Selection applies to the active treatment record until you save.
+          </p>
+        </div>
+        <div className="flex flex-col gap-2 sm:items-end w-full sm:max-w-xs">
+          <p className="text-xs text-text-secondary tabular-nums text-right">
+            Selected: {selected.size === 0 ? '—' : [...selected].sort().join(', ')}
+          </p>
+        </div>
+      </div>
+
+      <p className="text-[11px] uppercase tracking-wide text-text-muted mb-1 text-center">Upper arch</p>
+
+      <div className="relative isolate py-1">
+        <div
+          className="pointer-events-none absolute left-1/2 top-3 bottom-3 w-px -translate-x-1/2 bg-border/70"
+          aria-hidden
+        />
+        <div className="relative z-10 space-y-0">
+          <Row teeth={FDI_UPPER_LEFT_TO_RIGHT} upper />
+          <div className={`flex justify-center gap-x-1 ${TOOTH_NUMBER_GAP}`}>
+            {FDI_UPPER_LEFT_TO_RIGHT.map((fdi) => {
+              const size = toothSizeClass(fdi);
+              const isSel = selected.has(fdi);
+              return (
+                <span
+                  key={`u-${fdi}`}
+                  className={`text-[10px] tabular-nums text-center leading-none ${size.wrapper} ${
+                    isSel ? 'text-primary' : 'text-text-muted'
+                  }`}
+                >
+                  {fdi}
+                </span>
+              );
+            })}
+          </div>
+
+          <div
+            className="my-4 h-px w-full max-w-[min(100%,42rem)] mx-auto bg-border/70"
+            role="separator"
+            aria-hidden
+          />
+
+          <div className="my-4 pt-1">
+            <div className="flex justify-center gap-x-1">
+              {FDI_LOWER_LEFT_TO_RIGHT.map((fdi) => {
+                const size = toothSizeClass(fdi);
+                const isSel = selected.has(fdi);
+                return (
+                  <span
+                    key={`l-${fdi}`}
+                    className={`text-[10px] tabular-nums text-center leading-none ${size.wrapper} ${
+                      isSel ? 'text-primary' : 'text-text-muted'
+                    }`}
+                  >
+                    {fdi}
+                  </span>
+                );
+              })}
+            </div>
+            <div className={TOOTH_NUMBER_GAP}>
+              <Row teeth={FDI_LOWER_LEFT_TO_RIGHT} />
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <p className="text-[11px] uppercase tracking-wide text-text-muted mt-1 text-center">Lower arch</p>
+    </div>
+  );
+}
diff --git a/frontend/src/components/ui/treatment/PastTreatmentsPanel.tsx b/frontend/src/components/ui/treatment/PastTreatmentsPanel.tsx
new file mode 100644
index 0000000..1c6c497
--- /dev/null
+++ b/frontend/src/components/ui/treatment/PastTreatmentsPanel.tsx
@@ -0,0 +1,102 @@
+'use client';
+
+import { FileText } from 'lucide-react';
+import type { PastTreatment } from '@/types/treatment';
+
+interface PastTreatmentsPanelProps {
+  items: PastTreatment[];
+  loading?: boolean;
+  selectedTreatmentId?: string | null;
+  onSelectTreatment?: (treatment: PastTreatment) => void;
+}
+
+export function PastTreatmentsPanel({
+  items,
+  loading,
+  selectedTreatmentId,
+  onSelectTreatment,
+}: PastTreatmentsPanelProps) {
+  return (
+    <div className="surface-card p-4 space-y-3">
+      <div>
+        <h3 className="text-sm font-semibold text-text-primary">Previous treatments</h3>
+        <p className="text-xs text-text-muted mt-0.5">
+          Document preview is not implemented yet; file names are listed for context.
+        </p>
+      </div>
+
+      {loading && <p className="text-sm text-text-muted">Loading history...</p>}
+
+      {!loading && items.length === 0 && (
+        <p className="text-sm text-text-muted">No prior treatments for this patient.</p>
+      )}
+
+      <div className="space-y-3 max-h-[min(420px,55vh)] overflow-y-auto pr-1">
+        {items.map((t) => (
+          <article
+            key={t.id}
+            className={`border rounded-[var(--radius-md)] p-3 ${
+              selectedTreatmentId === t.id
+                ? 'border-primary/70 bg-primary-soft/35'
+                : 'border-border/70 bg-background-secondary/40'
+            }`}
+          >
+            <div className="flex items-start justify-between gap-2">
+              <p className="text-sm font-medium text-text-primary">{t.title}</p>
+              <time className="text-xs text-text-muted tabular-nums shrink-0" dateTime={t.treatmentAt}>
+                {new Date(t.treatmentAt).toLocaleDateString()}
+              </time>
+            </div>
+            <p className="text-xs text-text-secondary mt-1">Status: {t.status}</p>
+
+            {t.records.length > 0 && (
+              <ul className="mt-2 space-y-1.5 text-xs text-text-secondary">
+                {t.records.map((r) => (
+                  <li key={r.id}>
+                    <span className="text-text-primary font-medium">Record: </span>
+                    <span className="capitalize">{r.treatmentType}</span>
+                    {' | '}
+                    {r.teeth.length > 0 ? `Teeth ${[...r.teeth].sort().join(', ')}` : 'No teeth tagged'}
+                    {r.notes ? ` — ${r.notes}` : ''}
+                  </li>
+                ))}
+              </ul>
+            )}
+
+            {onSelectTreatment && (
+              <div className="mt-3 pt-2 border-t border-border/50 flex justify-end">
+                <button
+                  type="button"
+                  onClick={() => onSelectTreatment(t)}
+                  className="text-xs text-primary hover:underline focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/35 rounded-[var(--radius-sm)] px-1"
+                >
+                  Review details
+                </button>
+              </div>
+            )}
+
+            {t.documents.length > 0 && (
+              <div className="mt-3 pt-2 border-t border-border/50">
+                <p className="text-[11px] uppercase tracking-wide text-text-muted mb-1.5">Attachments</p>
+                <ul className="space-y-1">
+                  {t.documents.map((doc) => (
+                    <li
+                      key={doc.id}
+                      className="flex items-center gap-2 text-xs text-text-secondary"
+                    >
+                      <FileText className="w-3.5 h-3.5 shrink-0 icon-flat" aria-hidden />
+                      <span className="truncate">{doc.fileName}</span>
+                      <span className="text-text-muted tabular-nums shrink-0">
+                        {(doc.sizeBytes / 1024).toFixed(1)} KB
+                      </span>
+                    </li>
+                  ))}
+                </ul>
+              </div>
+            )}
+          </article>
+        ))}
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/ui/treatment/ToothGlyph.tsx b/frontend/src/components/ui/treatment/ToothGlyph.tsx
new file mode 100644
index 0000000..67e081f
--- /dev/null
+++ b/frontend/src/components/ui/treatment/ToothGlyph.tsx
@@ -0,0 +1,105 @@
+'use client';
+
+import { memo, type ReactNode } from 'react';
+import type { FdiToothId } from '@/types/treatment';
+import type { ToothShapeKind } from '@/components/treatment/fdiToothMeta';
+import { getToothPathModel, type ToothPathModel } from '@/components/ui/treatment/toothPathModel';
+
+interface ToothGlyphProps {
+  fdi: FdiToothId;
+  kind: ToothShapeKind;
+  gradientId: string;
+  selected: boolean;
+  upper?: boolean;
+  mirrored?: boolean;
+  upsideDown?: boolean;
+  className?: string;
+}
+
+function filledSilhouette(
+  model: ToothPathModel,
+  crownFill: string,
+  rootFill: string,
+  stroke: string,
+  strokeW: number,
+): ReactNode {
+  return (
+    <>
+      <path d={model.crown} fill={crownFill} stroke={stroke} strokeWidth={strokeW} strokeLinejoin="round" />
+      {model.roots.map((d, i) => (
+        <path key={i} d={d} fill={rootFill} stroke={stroke} strokeWidth={strokeW} strokeLinejoin="round" />
+      ))}
+    </>
+  );
+}
+
+function detailOnly(model: ToothPathModel, stroke: string, strokeW: number): ReactNode {
+  if (!model.detailStroke) return null;
+  const { d, widthScale } = model.detailStroke;
+  return <path d={d} fill="none" stroke={stroke} strokeWidth={strokeW * widthScale} strokeLinecap="round" />;
+}
+
+function renderClinicalFill(model: ToothPathModel, selected: boolean, gradientId: string): ReactNode {
+  const stroke = selected ? 'var(--color-primary)' : '#1e293b';
+  const strokeW = selected ? 2.4 : 1.35;
+  const fill = `url(#${gradientId})`;
+  return (
+    <>
+      {filledSilhouette(model, fill, fill, stroke, strokeW)}
+      {detailOnly(model, stroke, strokeW)}
+    </>
+  );
+}
+/** FDI chart tooth: clinical gradient + roots only. */
+export const ToothGlyph = memo(function ToothGlyph({
+  fdi,
+  kind,
+  gradientId,
+  selected,
+  upper,
+  mirrored,
+  upsideDown,
+  className = 'w-8 h-[4.85rem]',
+}: ToothGlyphProps) {
+  const model: ToothPathModel | null = getToothPathModel(fdi, kind, upper);
+  const filter = selected ? 'drop-shadow(0 0 6px rgba(9, 169, 188, 0.65))' : undefined;
+
+  if (!model) {
+    return (
+      <svg viewBox="0 0 36 78" className={`${className} shrink-0`} aria-hidden>
+        <text x="4" y="40" fontSize="8" fill="currentColor" opacity="0.35">
+          ?
+        </text>
+      </svg>
+    );
+  }
+
+  const body = renderClinicalFill(model, selected, gradientId);
+
+  return (
+    <svg
+      viewBox="0 0 36 78"
+      className={`${className} shrink-0`}
+      style={{ filter }}
+      aria-hidden
+    >
+      <defs>
+        <radialGradient id={gradientId} cx="45%" cy="35%" r="65%">
+          <stop offset="0%" stopColor={selected ? '#cffafe' : '#ffffff'} />
+          <stop offset="55%" stopColor={selected ? '#5eead4' : '#e0f2fe'} />
+          <stop offset="100%" stopColor={selected ? '#0e7490' : '#93c5fd'} />
+        </radialGradient>
+      </defs>
+      <g
+        transform={[
+          mirrored ? 'translate(36 0) scale(-1 1)' : '',
+          upsideDown ? 'translate(0 78) scale(1 -1)' : '',
+        ]
+          .filter(Boolean)
+          .join(' ') || undefined}
+      >
+        {body}
+      </g>
+    </svg>
+  );
+});
diff --git a/frontend/src/components/ui/treatment/TreatmentWorkspace.tsx b/frontend/src/components/ui/treatment/TreatmentWorkspace.tsx
new file mode 100644
index 0000000..e18ce0f
--- /dev/null
+++ b/frontend/src/components/ui/treatment/TreatmentWorkspace.tsx
@@ -0,0 +1,656 @@
+'use client';
+
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import { AppointmentsStrip } from '@/components/ui/treatment/AppointmentsStrip';
+import { FdiToothChart } from '@/components/ui/treatment/FdiToothChart';
+import { PastTreatmentsPanel } from '@/components/ui/treatment/PastTreatmentsPanel';
+import { Checkbox } from '@/components/ui/common/Checkbox';
+import { Button } from '@/components/ui/common/Button';
+import { Dropdown } from '@/components/ui/common/Dropdown';
+import { SearchBar } from '@/components/ui/common/SearchBar';
+import { isSameLocalCalendarDay, startOfLocalDay } from '@/lib/appointmentTime';
+import {
+  fetchLinkedOrganizations,
+  fetchMyAppointmentsForDay,
+  fetchPastTreatments,
+  saveTreatmentDraft,
+  sendTreatmentRecord,
+} from '@/lib/mocks/treatmentMockApi';
+import { pickAutoAppointment } from '@/lib/treatmentSelection';
+import { canEditTreatment } from '@/shared/permissions';
+import type { Organization } from '@/types/organization';
+import type {
+  FdiToothId,
+  LinkedOrganizationOption,
+  PastTreatment,
+  TreatmentAppointment,
+  TreatmentAttachmentMeta,
+  TreatmentRecordDraft,
+} from '@/types/treatment';
+
+function newRecord(): TreatmentRecordDraft {
+  return {
+    clientId:
+      typeof crypto !== 'undefined' && 'randomUUID' in crypto
+        ? crypto.randomUUID()
+        : `rec-${Date.now()}-${Math.random().toString(36).slice(2, 9)}`,
+    treatmentType: 'consultation',
+    teeth: [],
+    comment: '',
+    attachmentMetas: [],
+    sendToOrganizationIds: [],
+    sentAt: null,
+  };
+}
+
+interface TreatmentWorkspaceProps {
+  userId: string;
+  currentOrganization: Organization | null;
+}
+
+export function TreatmentWorkspace({ userId, currentOrganization }: TreatmentWorkspaceProps) {
+  const canEdit = canEditTreatment(currentOrganization);
+
+  const [stripHidden, setStripHidden] = useState(false);
+
+  const scheduleMinDate = useMemo(() => startOfLocalDay(new Date()), []);
+
+  const [selectedDay, setSelectedDay] = useState(() => startOfLocalDay(new Date()));
+  const [appointments, setAppointments] = useState<TreatmentAppointment[]>([]);
+  const [apptsLoading, setApptsLoading] = useState(false);
+  const [selectionLocked, setSelectionLocked] = useState(false);
+  const [selectedAppointmentId, setSelectedAppointmentId] = useState<string | null>(null);
+
+  const [history, setHistory] = useState<PastTreatment[]>([]);
+  const [historyLoading, setHistoryLoading] = useState(false);
+
+  const [orgs, setOrgs] = useState<LinkedOrganizationOption[]>([]);
+
+  const [records, setRecords] = useState<TreatmentRecordDraft[]>(() => [newRecord()]);
+  const [activeRecordId, setActiveRecordId] = useState<string>(() => records[0].clientId);
+
+  const selectionLockedRef = useRef(selectionLocked);
+  selectionLockedRef.current = selectionLocked;
+
+  const attachmentInputRef = useRef<HTMLInputElement>(null);
+
+  const [saveBusy, setSaveBusy] = useState(false);
+  const [sendBusyId, setSendBusyId] = useState<string | null>(null);
+  const [banner, setBanner] = useState<string | null>(null);
+  const [organizationSearch, setOrganizationSearch] = useState('');
+  const [recentOrganizationIds, setRecentOrganizationIds] = useState<string[]>([]);
+  const [reviewTreatment, setReviewTreatment] = useState<PastTreatment | null>(null);
+
+  const selectedAppointment = useMemo(
+    () => appointments.find((a) => a.id === selectedAppointmentId) ?? null,
+    [appointments, selectedAppointmentId],
+  );
+
+  const activeRecord = useMemo(
+    () => records.find((r) => r.clientId === activeRecordId) ?? records[0],
+    [records, activeRecordId],
+  );
+
+  const selectedTeethSet = useMemo(() => new Set(activeRecord.teeth), [activeRecord.teeth]);
+  const activeLinkedOrganizations = useMemo(() => orgs.filter((o) => o.active), [orgs]);
+  const filteredOrganizations = useMemo(() => {
+    const q = organizationSearch.trim().toLowerCase();
+    if (!q) return activeLinkedOrganizations;
+    return activeLinkedOrganizations.filter((o) => o.name.toLowerCase().includes(q));
+  }, [organizationSearch, activeLinkedOrganizations]);
+  const recentOrganizations = useMemo(() => {
+    if (recentOrganizationIds.length === 0) return [];
+    const recentSet = new Set(recentOrganizationIds);
+    return activeLinkedOrganizations
+      .filter((o) => recentSet.has(o.id))
+      .sort((a, b) => recentOrganizationIds.indexOf(a.id) - recentOrganizationIds.indexOf(b.id))
+      .slice(0, 3);
+  }, [recentOrganizationIds, activeLinkedOrganizations]);
+  const currentDraftPreview = useMemo<PastTreatment | null>(() => {
+    if (!selectedAppointment) return null;
+    return {
+      id: 'current-draft',
+      patientId: selectedAppointment.patientId,
+      title: `Current draft for ${selectedAppointment.patientFirstName} ${selectedAppointment.patientLastName}`,
+      treatmentAt: new Date().toISOString(),
+      status: 'draft',
+      records: records.map((r, idx) => ({
+        id: r.clientId || `draft-${idx + 1}`,
+        treatmentType: r.treatmentType,
+        teeth: r.teeth,
+        notes: r.comment || null,
+      })),
+      documents: records.flatMap((r) => r.attachmentMetas),
+    };
+  }, [records, selectedAppointment]);
+
+  const treatmentTypeTextColor = useMemo(() => {
+    const map: Record<TreatmentRecordDraft['treatmentType'], string> = {
+      consultation: '#ddd6fe',
+      filling: '#fed7aa',
+      endo: '#fecaca',
+      visit: '#bae6fd',
+      hygiene: '#d9f99d',
+    };
+    return map[activeRecord.treatmentType];
+  }, [activeRecord.treatmentType]);
+
+  useEffect(() => {
+    setSelectionLocked(false);
+  }, [selectedDay]);
+
+  useEffect(() => {
+    let cancelled = false;
+    setApptsLoading(true);
+    void (async () => {
+      try {
+        const list = await fetchMyAppointmentsForDay(userId, selectedDay);
+        if (cancelled) return;
+        setAppointments(list);
+        if (!selectionLockedRef.current) {
+          setSelectedAppointmentId(pickAutoAppointment(list, selectedDay));
+        }
+      } finally {
+        if (!cancelled) setApptsLoading(false);
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [userId, selectedDay]);
+
+  useEffect(() => {
+    const today = startOfLocalDay(new Date());
+    if (!isSameLocalCalendarDay(selectedDay, today) || selectionLocked) return;
+
+    const id = window.setInterval(() => {
+      setSelectedAppointmentId((prev) => {
+        const next = pickAutoAppointment(appointments, selectedDay);
+        return next ?? prev;
+      });
+    }, 60_000);
+
+    return () => window.clearInterval(id);
+  }, [selectedDay, appointments, selectionLocked]);
+
+  useEffect(() => {
+    let cancelled = false;
+    void (async () => {
+      const list = await fetchLinkedOrganizations();
+      if (!cancelled) setOrgs(list);
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  useEffect(() => {
+    if (!selectedAppointment) {
+      setHistory([]);
+      return;
+    }
+    let cancelled = false;
+    setHistoryLoading(true);
+    void (async () => {
+      const items = await fetchPastTreatments(selectedAppointment.patientId);
+      if (!cancelled) {
+        setHistory(items);
+        setHistoryLoading(false);
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [selectedAppointment?.patientId]);
+
+  useEffect(() => {
+    const first = newRecord();
+    setRecords([first]);
+    setActiveRecordId(first.clientId);
+    setOrganizationSearch('');
+    setReviewTreatment(null);
+  }, [selectedAppointment?.id]);
+
+  const fixActiveAfterRecordsChange = useCallback((next: TreatmentRecordDraft[]) => {
+    setRecords(next);
+    setActiveRecordId((id) => (next.some((r) => r.clientId === id) ? id : next[0].clientId));
+  }, []);
+
+  const toggleTooth = useCallback(
+    (fdi: FdiToothId) => {
+      if (!canEdit) return;
+      setRecords((prev) =>
+        prev.map((r) => {
+          if (r.clientId !== activeRecordId) return r;
+          const set = new Set(r.teeth);
+          if (set.has(fdi)) set.delete(fdi);
+          else set.add(fdi);
+          return { ...r, teeth: [...set].sort() as FdiToothId[] };
+        }),
+      );
+    },
+    [activeRecordId, canEdit],
+  );
+
+  const onPickAppointment = useCallback((id: string) => {
+    setSelectionLocked(true);
+    setSelectedAppointmentId(id);
+  }, []);
+
+  const addAttachments = useCallback(
+    (files: FileList | null) => {
+      if (!files?.length || !canEdit) return;
+      setRecords((prev) =>
+        prev.map((r) => {
+          if (r.clientId !== activeRecordId) return r;
+          const added: TreatmentAttachmentMeta[] = [...r.attachmentMetas];
+          for (let i = 0; i < files.length; i++) {
+            const f = files[i];
+            added.push({
+              id: `local-${Date.now()}-${i}-${Math.random().toString(36).slice(2, 7)}`,
+              fileName: f.name,
+              mimeType: f.type || 'application/octet-stream',
+              sizeBytes: f.size,
+            });
+          }
+          return { ...r, attachmentMetas: added };
+        }),
+      );
+    },
+    [activeRecordId, canEdit],
+  );
+
+  const handleSaveAll = useCallback(async () => {
+    if (!canEdit || !selectedAppointment) return;
+    setSaveBusy(true);
+    setBanner(null);
+    try {
+      await saveTreatmentDraft({
+        appointmentId: selectedAppointment.id,
+        patientId: selectedAppointment.patientId,
+        records: records.map(({ clientId: _c, sentAt: _s, ...rest }) => rest),
+      });
+      setBanner('Treatment draft saved (mock). You can send records later.');
+    } finally {
+      setSaveBusy(false);
+    }
+  }, [canEdit, selectedAppointment, records]);
+
+  const handleSendRecord = useCallback(
+    async (record: TreatmentRecordDraft) => {
+      if (!canEdit || !selectedAppointment) return;
+      const targets = record.sendToOrganizationIds.filter((id) =>
+        orgs.some((o) => o.id === id && o.active),
+      );
+      if (targets.length === 0) {
+        setBanner('Choose at least one active organization to send this record.');
+        return;
+      }
+      setSendBusyId(record.clientId);
+      setBanner(null);
+      try {
+        await sendTreatmentRecord({
+          appointmentId: selectedAppointment.id,
+          patientId: selectedAppointment.patientId,
+          recordClientId: record.clientId,
+          organizationIds: targets,
+        });
+        setRecords((prev) =>
+          prev.map((r) =>
+            r.clientId === record.clientId ? { ...r, sentAt: new Date().toISOString() } : r,
+          ),
+        );
+        setRecentOrganizationIds((prev) => {
+          const next = [...record.sendToOrganizationIds.filter((id) => id && !prev.includes(id)), ...prev];
+          return next.slice(0, 10);
+        });
+        setBanner('Record sent to selected organizations (mock).');
+      } finally {
+        setSendBusyId(null);
+      }
+    },
+    [canEdit, selectedAppointment, orgs],
+  );
+
+  if (!canEdit) {
+    return (
+      <div className="surface-card p-6 max-w-xl">
+        <h2 className="text-lg font-semibold text-text-primary">Treatment workspace</h2>
+        <p className="text-sm text-text-secondary mt-2">
+          Your role can view the Treatment tab, but editing clinical workflows requires{' '}
+          <span className="text-text-primary font-medium">Treatment edit</span> permission.
+        </p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-6">
+      <header className="space-y-1">
+        <h1 className="text-2xl font-semibold text-text-primary">Treatment</h1>
+        <p className="text-sm text-text-secondary">
+          Mocked data — appointments, history, save, and send are simulated until backend endpoints exist.
+        </p>
+      </header>
+
+      <AppointmentsStrip
+        stripHidden={stripHidden}
+        onToggleStripHidden={() => setStripHidden((s) => !s)}
+        selectedDay={selectedDay}
+        onSelectDay={setSelectedDay}
+        minScheduleDate={scheduleMinDate}
+        appointments={appointments}
+        selectedAppointmentId={selectedAppointmentId}
+        onSelectAppointment={onPickAppointment}
+        loading={apptsLoading}
+      />
+
+      {banner && (
+        <div className="rounded-[var(--radius-md)] border border-primary/40 bg-primary-soft px-4 py-2 text-sm text-text-primary">
+          {banner}
+        </div>
+      )}
+
+      <div className="grid grid-cols-1 xl:grid-cols-[minmax(280px,380px)_minmax(0,1fr)] gap-6 items-start">
+        <div className="space-y-4">
+          {selectedAppointment ? (
+            <div className="surface-card p-4 space-y-1">
+              <p className="text-xs uppercase tracking-wide text-text-muted">Selected patient</p>
+              <p className="text-lg font-semibold text-text-primary">
+                {selectedAppointment.patientFirstName} {selectedAppointment.patientLastName}
+              </p>
+              <p className="text-xs text-text-secondary">
+                Appointment purpose:{' '}
+                <span className="capitalize text-text-primary">{selectedAppointment.purpose}</span>
+              </p>
+            </div>
+          ) : (
+            <div className="surface-card p-4 text-sm text-text-muted">
+              {apptsLoading ? 'Loading appointments…' : 'Select a day with at least one appointment.'}
+            </div>
+          )}
+
+          <PastTreatmentsPanel
+            items={history}
+            loading={historyLoading}
+            selectedTreatmentId={reviewTreatment?.id ?? null}
+            onSelectTreatment={setReviewTreatment}
+          />
+          <div className="surface-card p-4 space-y-3">
+            <div className="flex items-center justify-between gap-2">
+              <h3 className="text-sm font-semibold text-text-primary">Treatment review</h3>
+              <Button
+                type="button"
+                variant="primary"
+                disabled={!selectedAppointment}
+                onClick={() => setReviewTreatment(currentDraftPreview)}
+              >
+                Preview current treatment
+              </Button>
+            </div>
+            {!reviewTreatment && (
+              <p className="text-sm text-text-muted">
+                Select a treatment from history, or preview the current draft.
+              </p>
+            )}
+            {reviewTreatment && (
+              <div className="border border-border/70 rounded-[var(--radius-md)] p-3 bg-background-secondary/40 space-y-2">
+                <div className="flex items-start justify-between gap-2">
+                  <p className="text-sm font-medium text-text-primary">{reviewTreatment.title}</p>
+                  <span className="text-xs text-text-muted tabular-nums">
+                    {new Date(reviewTreatment.treatmentAt).toLocaleDateString()}
+                  </span>
+                </div>
+                <p className="text-xs text-text-secondary capitalize">Status: {reviewTreatment.status}</p>
+                <div className="space-y-2">
+                  {reviewTreatment.records.map((r, idx) => (
+                    <div key={r.id} className="rounded-[var(--radius-sm)] border border-border/60 px-2.5 py-2">
+                      <p className="text-xs text-text-primary font-medium">Record {idx + 1}</p>
+                      <p className="text-xs text-text-secondary capitalize mt-1">
+                        Type: {r.treatmentType}
+                      </p>
+                      <p className="text-xs text-text-secondary">
+                        Teeth: {r.teeth.length ? [...r.teeth].sort().join(', ') : 'None selected'}
+                      </p>
+                      {r.notes && <p className="text-xs text-text-muted mt-1">Notes: {r.notes}</p>}
+                    </div>
+                  ))}
+                </div>
+                <p className="text-xs text-text-muted">
+                  Attachments: {reviewTreatment.documents.length}
+                </p>
+              </div>
+            )}
+          </div>
+        </div>
+
+        <div className="space-y-4 min-w-0">
+          <FdiToothChart
+            selected={selectedTeethSet}
+            onToggle={toggleTooth}
+            disabled={!selectedAppointment}
+          />
+
+          <div className="surface-card p-4 space-y-4">
+            <div className="flex flex-wrap items-center justify-between gap-3">
+              <div>
+                <h3 className="text-sm font-semibold text-text-primary">Treatment records</h3>
+                <p className="text-xs text-text-muted mt-0.5">
+                  Each record has its own teeth, notes, attachments, and destinations for send.
+                </p>
+              </div>
+              <Button
+                type="button"
+                variant="primary"
+                disabled={!selectedAppointment}
+                onClick={() => {
+                  const nr = newRecord();
+                  fixActiveAfterRecordsChange([...records, nr]);
+                  setActiveRecordId(nr.clientId);
+                }}
+              >
+                Add record
+              </Button>
+            </div>
+
+            <div className="flex flex-wrap gap-2">
+              {records.map((r, idx) => (
+                <button
+                  key={r.clientId}
+                  type="button"
+                  onClick={() => setActiveRecordId(r.clientId)}
+                  className={`
+                    rounded-[var(--radius-md)] border px-3 py-1.5 text-sm transition-colors
+                    focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/45
+                    ${
+                      r.clientId === activeRecordId
+                        ? 'border-primary bg-primary-soft font-medium text-text-primary'
+                        : 'border-border/70 text-text-secondary hover:border-border hover:bg-background-card/50'
+                    }
+                  `}
+                >
+                  Record {idx + 1}
+                  {r.sentAt ? ' · sent' : ''}
+                </button>
+              ))}
+            </div>
+
+            {activeRecord && (
+              <div className="space-y-4 border border-border/60 rounded-[var(--radius-md)] p-4 bg-background-secondary/30">
+                <label className="block text-xs font-medium text-text-secondary">
+                  Comments
+                  <textarea
+                    value={activeRecord.comment}
+                    onChange={(e) => {
+                      const v = e.target.value;
+                      setRecords((prev) =>
+                        prev.map((r) =>
+                          r.clientId === activeRecordId ? { ...r, comment: v } : r,
+                        ),
+                      );
+                    }}
+                    placeholder="Write clinical notes for this record…"
+                    rows={5}
+                    disabled={!selectedAppointment}
+                    className="mt-1.5 w-full rounded-[var(--radius-md)] border border-border bg-background-secondary/90 text-text-primary text-sm px-3 py-2 placeholder:text-text-muted focus:outline-none focus:ring-2 focus:ring-primary/35 resize-y min-h-[120px]"
+                  />
+                </label>
+
+                <div>
+                  <Dropdown
+                    label="Treatment type"
+                    value={activeRecord.treatmentType}
+                    onChange={(e) => {
+                      const nextType = e.target.value as TreatmentRecordDraft['treatmentType'];
+                      setRecords((prev) =>
+                        prev.map((r) =>
+                          r.clientId === activeRecordId ? { ...r, treatmentType: nextType } : r,
+                        ),
+                      );
+                    }}
+                    disabled={!selectedAppointment}
+                    className="capitalize"
+                    style={{ color: treatmentTypeTextColor }}
+                  >
+                    <option value="consultation" style={{ color: '#ddd6fe', backgroundColor: '#14253d' }} className="capitalize">consultation</option>
+                    <option value="filling" style={{ color: '#fed7aa', backgroundColor: '#14253d' }} className="capitalize">filling</option>
+                    <option value="endo" style={{ color: '#fecaca', backgroundColor: '#14253d' }} className="capitalize">endo</option>
+                    <option value="visit" style={{ color: '#bae6fd', backgroundColor: '#14253d' }} className="capitalize">visit</option>
+                    <option value="hygiene" style={{ color: '#d9f99d', backgroundColor: '#14253d' }} className="capitalize">hygiene</option>
+                  </Dropdown>
+                </div>
+
+                <div>
+                  <p className="text-xs font-medium text-text-secondary mb-2">Attachments (mock)</p>
+                  <input
+                    ref={attachmentInputRef}
+                    id="treatment-record-attachments"
+                    type="file"
+                    multiple
+                    disabled={!selectedAppointment}
+                    onChange={(e) => {
+                      addAttachments(e.target.files);
+                      e.target.value = '';
+                    }}
+                    className="sr-only"
+                    aria-label="Attach files for this treatment record"
+                  />
+                  <Button
+                    type="button"
+                    variant="primary"
+                    disabled={!selectedAppointment}
+                    onClick={() => attachmentInputRef.current?.click()}
+                    aria-controls="treatment-record-attachments"
+                  >
+                    Choose files
+                  </Button>
+                  {activeRecord.attachmentMetas.length > 0 && (
+                    <ul className="mt-2 space-y-1 text-xs text-text-muted">
+                      {activeRecord.attachmentMetas.map((f) => (
+                        <li key={f.id} className="truncate">
+                          {f.fileName} ({(f.sizeBytes / 1024).toFixed(1)} KB)
+                        </li>
+                      ))}
+                    </ul>
+                  )}
+                </div>
+
+                <div>
+                  <p className="text-xs font-medium text-text-secondary mb-2">
+                    Send this record to linked organizations
+                  </p>
+                  <div className="space-y-2 mb-2">
+                    <SearchBar
+                      value={organizationSearch}
+                      onChange={setOrganizationSearch}
+                      placeholder="Search active organizations..."
+                    />
+                    {recentOrganizations.length > 0 && (
+                      <div className="flex flex-wrap items-center gap-2">
+                        <span className="text-xs text-text-muted">Recent:</span>
+                        {recentOrganizations.map((o) => (
+                          <button
+                            key={o.id}
+                            type="button"
+                            onClick={() => {
+                              setRecords((prev) =>
+                                prev.map((r) => {
+                                  if (r.clientId !== activeRecordId || r.sentAt) return r;
+                                  if (r.sendToOrganizationIds.includes(o.id)) return r;
+                                  return { ...r, sendToOrganizationIds: [...r.sendToOrganizationIds, o.id] };
+                                }),
+                              );
+                            }}
+                            className="text-xs rounded-[var(--radius-sm)] border border-border/70 px-2 py-1 text-text-secondary hover:text-text-primary hover:border-border focus:outline-none focus-visible:ring-2 focus-visible:ring-primary/35"
+                          >
+                            {o.name}
+                          </button>
+                        ))}
+                      </div>
+                    )}
+                  </div>
+                  <div className="flex flex-col gap-2">
+                    {filteredOrganizations.map((o) => (
+                      <Checkbox
+                        key={o.id}
+                        checked={activeRecord.sendToOrganizationIds.includes(o.id)}
+                        disabled={!selectedAppointment || Boolean(activeRecord.sentAt)}
+                        onChange={(checked) => {
+                          setRecords((prev) =>
+                            prev.map((r) => {
+                              if (r.clientId !== activeRecordId) return r;
+                              const next = new Set(r.sendToOrganizationIds);
+                              if (checked) next.add(o.id);
+                              else next.delete(o.id);
+                              return { ...r, sendToOrganizationIds: [...next] };
+                            }),
+                          );
+                        }}
+                        label={`${o.name}${o.active ? '' : ' (inactive)'}`}
+                      />
+                    ))}
+                    {filteredOrganizations.length === 0 && (
+                      <p className="text-xs text-text-muted">No active organization matches your search.</p>
+                    )}
+                  </div>
+                </div>
+
+                <div className="flex flex-wrap items-center gap-3 pt-1">
+                  <Button
+                    type="button"
+                    variant="primary"
+                    disabled={!selectedAppointment || Boolean(activeRecord.sentAt) || sendBusyId === activeRecord.clientId}
+                    isLoading={sendBusyId === activeRecord.clientId}
+                    onClick={() => void handleSendRecord(activeRecord)}
+                  >
+                    Send this record
+                  </Button>
+                  {activeRecord.sentAt && (
+                    <span className="text-xs text-text-muted">
+                      Sent at {new Date(activeRecord.sentAt).toLocaleString()}
+                    </span>
+                  )}
+                </div>
+              </div>
+            )}
+
+            <div className="flex flex-wrap gap-3 pt-2 border-t border-border/60">
+              <Button
+                type="button"
+                variant="primary"
+                disabled={!selectedAppointment || saveBusy}
+                isLoading={saveBusy}
+                onClick={() => void handleSaveAll()}
+              >
+                Save treatment draft
+              </Button>
+              <p className="text-xs text-text-muted self-center">
+                Saving stores all records locally (mock). Sending is per record and can happen after save.
+              </p>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/ui/treatment/toothPathModel.ts b/frontend/src/components/ui/treatment/toothPathModel.ts
new file mode 100644
index 0000000..1753629
--- /dev/null
+++ b/frontend/src/components/ui/treatment/toothPathModel.ts
@@ -0,0 +1,113 @@
+import type { FdiToothId } from '@/types/treatment';
+import type { ToothShapeKind } from '@/components/treatment/fdiToothMeta';
+
+export interface ToothPathModel {
+  crown: string;
+  roots: string[];
+  /** Occlusal groove etc. — open path, stroke only */
+  detailStroke?: { d: string; widthScale: number };
+}
+
+/** FDI-specific closed paths for the clinical (gradient + roots) chart. */
+export function getToothPathModel(fdi: FdiToothId, kind: ToothShapeKind, upper?: boolean): ToothPathModel | null {
+  const lastDigit = Number(fdi[1]);
+  const isThirdMolar = lastDigit === 8;
+  const isSecondMolar = lastDigit === 7;
+  const isFirstMolar = lastDigit === 6;
+  const isCentralIncisor = lastDigit === 1;
+  const isLateralIncisor = lastDigit === 2;
+
+  switch (kind) {
+    case 'incisor':
+      if (isLateralIncisor) {
+        return {
+          crown: 'M12 9 C14 6, 22 6, 24 9 C26 12, 26 25, 23 30 C21 32, 15 32, 13 30 C10 25, 10 12, 12 9 Z',
+          roots: ['M15.5 30 C14.5 40, 14.5 51, 16 60 C17 65, 19 65, 20 60 C21.5 51, 21.5 40, 20.5 30 Z'],
+        };
+      }
+      return {
+        crown: 'M11 8 C13 5, 23 5, 25 8 C27 12, 27 26, 24 31 C22 33, 14 33, 12 31 C9 26, 9 12, 11 8 Z',
+        roots: ['M15 31 C14 42, 14 53, 16 63 C17 68, 19 68, 20 63 C22 53, 22 42, 21 31 Z'],
+      };
+    case 'canine':
+      return {
+        crown: 'M18 6 C22 6, 25 10, 26 15 C26 20, 24 30, 22 33 C20 35, 16 35, 14 33 C12 30, 10 20, 10 15 C11 10, 14 6, 18 6 Z',
+        roots: ['M16 33 C14 44, 13 55, 14 66 C15 72, 18 75, 20 66 C21 55, 20 44, 20 33 Z'],
+      };
+    case 'premolar':
+      if (upper && lastDigit === 4) {
+        return {
+          crown: 'M9 12 C11 8, 15 7, 18 9 C21 7, 25 8, 27 12 C29 16, 29 25, 26 31 C24 34, 12 34, 10 31 C7 25, 7 16, 9 12 Z',
+          roots: [
+            'M13 31 C12 39, 12 48, 13 56 C14 62, 16 64, 17 58 C18 54, 18 48, 18 41 Z',
+            'M23 31 C24 39, 24 48, 23 56 C22 62, 20 64, 19 58 C18 54, 18 48, 18 41 Z',
+          ],
+        };
+      }
+      return {
+        crown: 'M9 12 C11 8, 15 7, 18 9 C21 7, 25 8, 27 12 C29 16, 29 26, 26 31 C24 34, 12 34, 10 31 C7 26, 7 16, 9 12 Z',
+        roots: ['M16 31 C15 42, 15 53, 16 62 C17 67, 19 67, 20 62 C21 53, 21 42, 20 31 Z'],
+      };
+    case 'molar':
+      if (isThirdMolar) {
+        const crown =
+          'M9 15 C11 11, 14 10, 17 11 C20 9, 24 10, 26 14 C28 18, 28 26, 25 31 C23 33, 11 33, 9 31 C6 26, 6 19, 9 15 Z';
+        if (upper) {
+          return {
+            crown,
+            roots: [
+              'M14 32 C13 39, 13 47, 14 54 C15 59, 17 61, 18 55 C19 50, 19 41, 18 33 Z',
+              'M22 32 C23 39, 23 47, 22 54 C21 59, 19 61, 18 55 C17 50, 17 41, 18 33 Z',
+            ],
+          };
+        }
+        return {
+          crown,
+          roots: [
+            'M14 32 C12 39, 12 47, 13 55 C14 61, 16 64, 18 57 C19 52, 19 44, 18 36 Z',
+            'M22 32 C24 39, 24 47, 23 55 C22 61, 20 64, 18 57 C17 52, 17 44, 18 36 Z',
+          ],
+        };
+      }
+      if (isSecondMolar && upper) {
+        return {
+          crown: 'M8 14 C10 9, 13 8, 16 10 C18 8, 21 8, 23 10 C26 8, 29 9, 30 14 C31 18, 31 27, 28 32 C26 35, 10 35, 8 32 C5 27, 5 18, 8 14 Z',
+          roots: [
+            'M11 35 C9 43, 9 50, 10 57 C11 62, 13 64, 14 58 C15 52, 15 44, 14 36 Z',
+            'M18 35 C17 44, 17 52, 18 60 C19 66, 20 66, 21 60 C22 52, 22 44, 21 35 Z',
+            'M25 35 C27 43, 27 50, 26 57 C25 62, 23 64, 22 58 C21 52, 21 44, 22 36 Z',
+          ],
+        };
+      }
+      if (isFirstMolar && !upper) {
+        return {
+          crown: 'M7 14 C9 9, 13 8, 16 10 C18 8, 21 8, 23 10 C26 8, 30 9, 31 14 C32 18, 32 27, 29 32 C27 35, 9 35, 7 32 C4 27, 4 18, 7 14 Z',
+          roots: [
+            'M11 35 C9 43, 9 50, 10 58 C11 64, 14 67, 16 60 C17 56, 17 50, 17 44 Z',
+            'M25 35 C27 43, 27 50, 26 58 C25 64, 22 67, 20 60 C19 56, 19 50, 19 44 Z',
+          ],
+          detailStroke: { d: 'M15 61 Q18 66 21 61', widthScale: 0.85 },
+        };
+      }
+      if (upper) {
+        return {
+          crown: 'M7 14 C9 9, 13 8, 16 10 C18 8, 21 8, 23 10 C26 8, 30 9, 31 14 C32 18, 32 27, 29 32 C27 35, 9 35, 7 32 C4 27, 4 18, 7 14 Z',
+          roots: [
+            'M11 35 C9 43, 9 50, 10 57 C11 62, 13 64, 14 58 C15 52, 15 44, 14 36 Z',
+            'M18 35 C17 44, 17 52, 18 60 C19 66, 20 66, 21 60 C22 52, 22 44, 21 35 Z',
+            'M25 35 C27 43, 27 50, 26 57 C25 62, 23 64, 22 58 C21 52, 21 44, 22 36 Z',
+          ],
+        };
+      }
+      return {
+        crown: 'M7 14 C9 9, 13 8, 16 10 C18 8, 21 8, 23 10 C26 8, 30 9, 31 14 C32 18, 32 27, 29 32 C27 35, 9 35, 7 32 C4 27, 4 18, 7 14 Z',
+        roots: [
+          'M11 35 C9 43, 9 50, 10 58 C11 64, 14 67, 16 60 C17 56, 17 50, 17 44 Z',
+          'M25 35 C27 43, 27 50, 26 58 C25 64, 22 67, 20 60 C19 56, 19 50, 19 44 Z',
+        ],
+        detailStroke: { d: 'M15 61 Q18 66 21 61', widthScale: 0.85 },
+      };
+    default:
+      return null;
+  }
+}
diff --git a/frontend/src/lib/mocks/treatmentMockApi.ts b/frontend/src/lib/mocks/treatmentMockApi.ts
new file mode 100644
index 0000000..21dbff9
--- /dev/null
+++ b/frontend/src/lib/mocks/treatmentMockApi.ts
@@ -0,0 +1,200 @@
+import {
+  addCalendarDays,
+  isSameLocalCalendarDay,
+  startOfLocalDay,
+} from '@/lib/appointmentTime';
+import type {
+  FdiToothId,
+  LinkedOrganizationOption,
+  PastTreatment,
+  SaveTreatmentPayload,
+  SendTreatmentRecordPayload,
+  TreatmentAppointment,
+} from '@/types/treatment';
+
+const MOCK_DELAY_MS = 280;
+
+function sleep(ms = MOCK_DELAY_MS) {
+  return new Promise<void>((resolve) => setTimeout(resolve, ms));
+}
+
+function pad2(n: number) {
+  return String(n).padStart(2, '0');
+}
+
+/** Builds deterministic ids so React keys stay stable across hot reloads */
+function mockApptId(dayKey: string, slotIndex: number | string) {
+  return `mock-appt-${dayKey}-${slotIndex}`;
+}
+
+function buildSlotsForDay(day: Date, userId: string): TreatmentAppointment[] {
+  const dayStart = startOfLocalDay(day);
+  const y = dayStart.getFullYear();
+  const m = dayStart.getMonth();
+  const d = dayStart.getDate();
+  const dayKey = `${y}-${pad2(m + 1)}-${pad2(d)}`;
+
+  const base: Omit<TreatmentAppointment, 'id' | 'startAt' | 'endAt'>[] = [
+    {
+      patientId: 'pat-alice',
+      patientFirstName: 'Alice',
+      patientLastName: 'Moradi',
+      providerUserId: userId,
+      purpose: 'consultation',
+    },
+    {
+      patientId: 'pat-babak',
+      patientFirstName: 'Babak',
+      patientLastName: 'Karimi',
+      providerUserId: userId,
+      purpose: 'filling',
+    },
+    {
+      patientId: 'pat-sara',
+      patientFirstName: 'Sara',
+      patientLastName: 'Hosseini',
+      providerUserId: userId,
+      purpose: 'endo',
+    },
+  ];
+
+  const slots: TreatmentAppointment[] = [];
+  const times = [
+    [9, 0, 9, 45],
+    [11, 15, 12, 0],
+    [14, 30, 15, 30],
+  ];
+
+  times.forEach(([h1, m1, h2, m2], i) => {
+    const baseSlot = base[i % base.length];
+    const startAt = new Date(y, m, d, h1, m1, 0, 0).toISOString();
+    const endAt = new Date(y, m, d, h2, m2, 0, 0).toISOString();
+    slots.push({
+      id: mockApptId(dayKey, i),
+      ...baseSlot,
+      startAt,
+      endAt,
+    });
+  });
+
+  const today = new Date();
+  if (isSameLocalCalendarDay(day, today)) {
+    const now = today.getTime();
+    const start = new Date(now - 12 * 60 * 1000);
+    const end = new Date(now + 48 * 60 * 1000);
+    slots.unshift({
+      id: mockApptId(dayKey, 'now'),
+      patientId: 'pat-hesam',
+      patientFirstName: 'Hesam',
+      patientLastName: 'Aghaie',
+      providerUserId: userId,
+      startAt: start.toISOString(),
+      endAt: end.toISOString(),
+      purpose: 'visit',
+    });
+  }
+
+  return slots.sort((a, b) => new Date(a.startAt).getTime() - new Date(b.startAt).getTime());
+}
+
+const MOCK_HISTORY: Record<string, PastTreatment[]> = {
+  'pat-hesam': [
+    {
+      id: 'pt-h-1',
+      patientId: 'pat-hesam',
+      title: 'Root canal 45',
+      treatmentAt: new Date(2026, 8, 12).toISOString(),
+      status: 'completed',
+      records: [
+        {
+          id: 'ptr-1',
+          treatmentType: 'endo',
+          teeth: ['45'] as FdiToothId[],
+          notes: 'Instrumented and temporized.',
+        },
+      ],
+      documents: [
+        {
+          id: 'doc-1',
+          fileName: 'periapical-45.png',
+          mimeType: 'image/png',
+          sizeBytes: 842_120,
+        },
+        {
+          id: 'doc-2',
+          fileName: 'consent-signed.pdf',
+          mimeType: 'application/pdf',
+          sizeBytes: 312_000,
+        },
+      ],
+    },
+    {
+      id: 'pt-h-2',
+      patientId: 'pat-hesam',
+      title: 'Filling 14, 15',
+      treatmentAt: new Date(2025, 9, 10).toISOString(),
+      status: 'completed',
+      records: [
+        {
+          id: 'ptr-2',
+          treatmentType: 'filling',
+          teeth: ['14', '15'] as FdiToothId[],
+          notes: 'Composite restoration.',
+        },
+      ],
+      documents: [
+        {
+          id: 'doc-3',
+          fileName: 'notes.txt',
+          mimeType: 'text/plain',
+          sizeBytes: 420,
+        },
+      ],
+    },
+  ],
+  'pat-alice': [
+    {
+      id: 'pt-a-1',
+      patientId: 'pat-alice',
+      title: 'Hygiene visit',
+      treatmentAt: addCalendarDays(new Date(), -21).toISOString(),
+      status: 'completed',
+      records: [{ id: 'ptr-a', treatmentType: 'hygiene', teeth: [], notes: 'Scale & polish.' }],
+      documents: [],
+    },
+  ],
+};
+
+const MOCK_ORGS: LinkedOrganizationOption[] = [
+  { id: 'org-lab-north', name: 'North Dental Lab', active: true },
+  { id: 'org-lab-smile', name: 'Smile Ceramics', active: true },
+  { id: 'org-lab-old', name: 'Legacy Lab (inactive)', active: false },
+];
+
+export async function fetchMyAppointmentsForDay(
+  userId: string,
+  day: Date,
+): Promise<TreatmentAppointment[]> {
+  await sleep();
+  return buildSlotsForDay(day, userId);
+}
+
+export async function fetchPastTreatments(patientId: string): Promise<PastTreatment[]> {
+  await sleep();
+  return MOCK_HISTORY[patientId] ?? [];
+}
+
+export async function fetchLinkedOrganizations(): Promise<LinkedOrganizationOption[]> {
+  await sleep(180);
+  return MOCK_ORGS;
+}
+
+export async function saveTreatmentDraft(_payload: SaveTreatmentPayload): Promise<{ ok: true }> {
+  await sleep();
+  return { ok: true };
+}
+
+export async function sendTreatmentRecord(_payload: SendTreatmentRecordPayload): Promise<{ ok: true }> {
+  await sleep();
+  return { ok: true };
+}
diff --git a/frontend/src/lib/treatmentSelection.ts b/frontend/src/lib/treatmentSelection.ts
new file mode 100644
index 0000000..482d00d
--- /dev/null
+++ b/frontend/src/lib/treatmentSelection.ts
@@ -0,0 +1,25 @@
+import { isSameLocalCalendarDay } from '@/lib/appointmentTime';
+import type { TreatmentAppointment } from '@/types/treatment';
+
+/**
+ * For the selected calendar day: if it is today, pick the appointment whose time range contains now;
+ * otherwise pick the first appointment of that day. Returns null when there are no appointments.
+ */
+export function pickAutoAppointment(
+  appointments: TreatmentAppointment[],
+  selectedDay: Date,
+): string | null {
+  if (appointments.length === 0) return null;
+
+  const now = new Date();
+  if (isSameLocalCalendarDay(selectedDay, now)) {
+    const t = now.getTime();
+    for (const a of appointments) {
+      const s = new Date(a.startAt).getTime();
+      const e = new Date(a.endAt).getTime();
+      if (t >= s && t <= e) return a.id;
+    }
+  }
+
+  return appointments[0].id;
+}
diff --git a/frontend/src/shared/permissions.ts b/frontend/src/shared/permissions.ts
index 627a2f5..753e73f 100644
--- a/frontend/src/shared/permissions.ts
+++ b/frontend/src/shared/permissions.ts
@@ -80,3 +80,10 @@ export function canAccessAppointmentsSection(org: Organization | null): boolean
     hasPermission(org, 'TAB_TREATMENT_EDIT')
   );
 }
+
+/** Treatment composer, scheduling columns, and saving clinical workflows */
+export function canEditTreatment(org: Organization | null): boolean {
+  if (!org) return false;
+  if (org.isOwner) return true;
+  return hasPermission(org, 'TAB_TREATMENT_EDIT');
+}
diff --git a/frontend/src/types/treatment.ts b/frontend/src/types/treatment.ts
new file mode 100644
index 0000000..79332e3
--- /dev/null
+++ b/frontend/src/types/treatment.ts
@@ -0,0 +1,112 @@
+/** Permanent dentition FDI ids (11–48), stored as two-digit strings */
+export type FdiToothId =
+  | '11'
+  | '12'
+  | '13'
+  | '14'
+  | '15'
+  | '16'
+  | '17'
+  | '18'
+  | '21'
+  | '22'
+  | '23'
+  | '24'
+  | '25'
+  | '26'
+  | '27'
+  | '28'
+  | '31'
+  | '32'
+  | '33'
+  | '34'
+  | '35'
+  | '36'
+  | '37'
+  | '38'
+  | '41'
+  | '42'
+  | '43'
+  | '44'
+  | '45'
+  | '46'
+  | '47'
+  | '48';
+
+export interface TreatmentAppointment {
+  id: string;
+  patientId: string;
+  patientFirstName: string;
+  patientLastName: string;
+  providerUserId: string;
+  startAt: string;
+  endAt: string;
+  purpose: string;
+}
+
+export interface TreatmentAttachmentMeta {
+  id: string;
+  fileName: string;
+  mimeType: string;
+  sizeBytes: number;
+}
+
+export const TREATMENT_TYPES = [
+  'consultation',
+  'filling',
+  'endo',
+  'visit',
+  'hygiene',
+] as const;
+
+export type TreatmentType = (typeof TREATMENT_TYPES)[number];
+
+export interface PastTreatmentRecord {
+  id: string;
+  treatmentType: TreatmentType;
+  teeth: FdiToothId[];
+  notes?: string | null;
+}
+
+export interface PastTreatment {
+  id: string;
+  patientId: string;
+  title: string;
+  treatmentAt: string;
+  status: string;
+  records: PastTreatmentRecord[];
+  documents: TreatmentAttachmentMeta[];
+}
+
+export interface LinkedOrganizationOption {
+  id: string;
+  name: string;
+  active: boolean;
+}
+
+export interface TreatmentRecordDraft {
+  clientId: string;
+  treatmentType: TreatmentType;
+  teeth: FdiToothId[];
+  comment: string;
+  attachmentMetas: TreatmentAttachmentMeta[];
+  /** Organizations selected for sending this record (mock only until API exists) */
+  sendToOrganizationIds: string[];
+  sentAt?: string | null;
+}
+
+/** Payload for persisting a draft (mock API); omits ephemeral client-only fields */
+export type SavedTreatmentRecordPayload = Omit<TreatmentRecordDraft, 'clientId' | 'sentAt'>;
+
+export interface SaveTreatmentPayload {
+  appointmentId: string;
+  patientId: string;
+  records: SavedTreatmentRecordPayload[];
+}
+
+export interface SendTreatmentRecordPayload {
+  appointmentId: string;
+  patientId: string;
+  recordClientId: string;
+  organizationIds: string[];
+}