improvement: all demo bugs fixed. give me more baby.

backend/prisma/migrations/20260708120000_case_level_important/migration.sql

@@ -0,0 +1,13 @@
+-- Move the "important" flag from individual tasks to the case as a whole.
+ALTER TABLE "lab_cases" ADD COLUMN "isImportant" BOOLEAN NOT NULL DEFAULT false;
+
+-- Carry over existing importance: a case is important if any of its tasks were.
+UPDATE "lab_cases" lc
+SET "isImportant" = true
+WHERE EXISTS (
+  SELECT 1 FROM "lab_case_tasks" t
+  WHERE t."labCaseId" = lc."id" AND t."isImportant" = true
+);
+
+DROP INDEX IF EXISTS "lab_case_tasks_labCaseId_isImportant_idx";
+ALTER TABLE "lab_case_tasks" DROP COLUMN "isImportant";