fix: unify theme system - fix theme switching persistence

- Unified localStorage key to 'theme-preference' across all components
- Fixed header.tsx using wrong localStorage key ('theme' instead of 'theme-preference')
- Added localStorage hybrid persistence for instant theme changes
- Removed router.refresh() which was causing stale data revert
- Replaced Blue theme with Sepia
- Consolidated auth() calls to prevent race conditions
- Updated UserSettingsData types to include all themes

keep-notes/prisma/migrations/20260117010000_add_ai_note_fields/migration.sql

@@ -0,0 +1,7 @@
+-- AlterTable
+ALTER TABLE "Note" ADD COLUMN "autoGenerated" BOOLEAN;
+ALTER TABLE "Note" ADD COLUMN "aiProvider" TEXT;
+ALTER TABLE "Note" ADD COLUMN "aiConfidence" INTEGER;
+ALTER TABLE "Note" ADD COLUMN "language" TEXT;
+ALTER TABLE "Note" ADD COLUMN "languageConfidence" REAL;
+ALTER TABLE "Note" ADD COLUMN "lastAiAnalysis" DATETIME;

keep-notes/prisma/migrations/20260117010001_add_ai_feedback/migration.sql

@@ -0,0 +1,26 @@
+-- CreateTable
+CREATE TABLE "AiFeedback" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "noteId" TEXT NOT NULL,
+    "userId" TEXT,
+    "feedbackType" TEXT NOT NULL,
+    "feature" TEXT NOT NULL,
+    "originalContent" TEXT NOT NULL,
+    "correctedContent" TEXT,
+    "metadata" TEXT,
+    "createdAt" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY ("noteId") REFERENCES "Note"("id") ON DELETE CASCADE ON UPDATE CASCADE,
+    FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+-- CreateIndex
+CREATE INDEX "AiFeedback_noteId_idx" ON "AiFeedback"("noteId");
+
+-- CreateIndex
+CREATE INDEX "AiFeedback_userId_idx" ON "AiFeedback"("userId");
+
+-- CreateIndex
+CREATE INDEX "AiFeedback_feature_idx" ON "AiFeedback"("feature");
+
+-- CreateIndex
+CREATE INDEX "AiFeedback_createdAt_idx" ON "AiFeedback"("createdAt");

keep-notes/prisma/migrations/20260117200000_add_settings_fields/migration.sql

@@ -0,0 +1,4 @@
+-- AlterTable
+ALTER TABLE "UserAISettings" ADD COLUMN "emailNotifications" BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE "UserAISettings" ADD COLUMN "desktopNotifications" BOOLEAN NOT NULL DEFAULT false;
+ALTER TABLE "UserAISettings" ADD COLUMN "anonymousAnalytics" BOOLEAN NOT NULL DEFAULT false;