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

mcp-server/test-server.js

@@ -0,0 +1,84 @@
+#!/usr/bin/env node
+// Test script to verify MCP server can connect to the database
+
+import { PrismaClient } from '@prisma/client';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+console.log('🧪 Testing MCP Server Database Connection...\n');
+
+try {
+  const prisma = new PrismaClient({
+    datasources: {
+      db: {
+        url: 'file:D:/dev_new_pc/Keep/keep-notes/prisma/dev.db'
+      }
+    }
+  });
+
+  console.log('✅ Prisma Client initialized successfully');
+
+  // Test 1: Count notes
+  console.log('\n📝 Test 1: Counting notes...');
+  const noteCount = await prisma.note.count();
+  console.log(`   Found ${noteCount} notes in database`);
+
+  // Test 2: Get recent notes
+  console.log('\n📝 Test 2: Fetching recent notes...');
+  const recentNotes = await prisma.note.findMany({
+    take: 3,
+    orderBy: { updatedAt: 'desc' }
+  });
+  console.log(`   Fetched ${recentNotes.length} recent notes`);
+  if (recentNotes.length > 0) {
+    console.log(`   Latest note: ${recentNotes[0].title || 'Untitled'}`);
+  }
+
+  // Test 3: Count notebooks
+  console.log('\n📚 Test 3: Counting notebooks...');
+  const notebookCount = await prisma.notebook.count();
+  console.log(`   Found ${notebookCount} notebooks in database`);
+
+  // Test 4: Get notebooks
+  console.log('\n📚 Test 4: Fetching notebooks...');
+  const notebooks = await prisma.notebook.findMany({
+    take: 3,
+    orderBy: { order: 'asc' }
+  });
+  console.log(`   Fetched ${notebooks.length} notebooks`);
+  if (notebooks.length > 0) {
+    notebooks.forEach(nb => {
+      console.log(`   - ${nb.icon || '📁'} ${nb.name}`);
+    });
+  }
+
+  // Test 5: Count labels
+  console.log('\n🏷️  Test 5: Counting labels...');
+  const labelCount = await prisma.label.count();
+  console.log(`   Found ${labelCount} labels in database`);
+
+  // Test 6: Get labels
+  console.log('\n🏷️  Test 6: Fetching labels...');
+  const labels = await prisma.label.findMany({
+    take: 5,
+    orderBy: { name: 'asc' }
+  });
+  console.log(`   Fetched ${labels.length} labels`);
+  if (labels.length > 0) {
+    labels.forEach(l => {
+      console.log(`   - ${l.name} (${l.color})`);
+    });
+  }
+
+  await prisma.$disconnect();
+  console.log('\n✅ All database tests passed successfully!');
+  console.log('🚀 MCP Server is ready to use!\n');
+
+} catch (error) {
+  console.error('\n❌ Database test failed:', error.message);
+  console.error(error);
+  process.exit(1);
+}