feat: rename keep-notes to memento-note, migrate to PostgreSQL, fix MCP bugs

- Rename directory keep-notes -> memento-note with all code references
- Prisma: SQLite -> PostgreSQL (both app and MCP server schemas)
- Sync MCP schema with main app (add missing fields, relations, indexes)
- Delete 17 SQLite migrations (clean slate for PostgreSQL)
- Remove SQLite dependencies (@libsql/client, better-sqlite3, etc.)
- Fix MCP server: hardcoded Windows DB paths -> DATABASE_URL env var
- Fix MCP server: .dockerignore excluded index-sse.js (SSE mode broken)
- MCP Dockerfile: node:20 -> node:22
- Docker Compose: add postgres service, remove SQLite volume
- Generate favicon.ico, icon-192.png, icon-512.png, apple-icon.png
- Update layout.tsx icons and manifest.json for PNG icons
- Update all .env files for PostgreSQL
- Rewrite README.md with updated sections
- Remove mcp-server/node_modules and prisma/client-generated from git tracking

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

memento-note/playwright-test.ts

@@ -0,0 +1,92 @@
+/**
+ * Playwright test script to diagnose MasonryGrid hot reload issue
+ */
+
+const { chromium } = require('playwright');
+
+async function testMasonryLayout() {
+  console.log('🔍 Starting Masonry layout diagnosis...');
+
+  const browser = await chromium.launch({
+    headless: false,  // Show browser for visual inspection
+    slowMo: 50,  // Slow down actions for better visibility
+  });
+
+  const context = await browser.newContext({
+    viewport: { width: 1920, height: 1080 }
+  });
+
+  const page = await context.newPage();
+
+  // Navigate to the app
+  await page.goto('http://localhost:3000');
+
+  // Wait for page to load
+  await page.waitForTimeout(3000);
+
+  // Take screenshot of initial state
+  await page.screenshot({ path: 'masonry-before.png', fullPage: true });
+  console.log('📸 Screenshot saved: masonry-before.png');
+
+  // Check DOM for MasonryItem elements
+  const masonryItems = await page.$$eval('.masonry-item', (items) => {
+    return items.map(item => ({
+      hasDataSize: item.hasAttribute('data-size'),
+      dataSize: item.getAttribute('data-size'),
+      hasStyle: item.hasAttribute('style'),
+      style: item.getAttribute('style'),
+      className: item.className,
+      computedWidth: window.getComputedStyle(item).width,
+    }));
+  });
+
+  console.log('🎯 MasonryItem analysis:');
+  console.table(masonryItems);
+
+  // Check which items have inline styles
+  const itemsWithInlineStyle = masonryItems.filter(item => item.hasStyle);
+  console.log(`✓ Items with inline style attribute: ${itemsWithInlineStyle.length}/${masonryItems.length}`);
+
+  // Check which items have data-size attribute
+  const itemsWithDataSize = masonryItems.filter(item => item.hasDataSize);
+  console.log(`✓ Items with data-size attribute: ${itemsWithDataSize.length}/${masonryItems.length}`);
+
+  // Analyze computed widths
+  const uniqueWidths = [...new Set(masonryItems.map(item => item.computedWidth))];
+  console.log(`📏 Unique computed widths found:`, uniqueWidths);
+
+  // Check if Muuri is initialized
+  const muuriStatus = await page.evaluate(() => {
+    const gridElement = document.querySelector('.muuri-item');
+    if (!gridElement) return 'No Muuri grid found';
+
+    const gridRect = gridElement.getBoundingClientRect();
+    const muuriContainer = gridElement.parentElement;
+
+    if (muuriContainer) {
+      const containerRect = muuriContainer.getBoundingClientRect();
+      return {
+        gridRect,
+        containerRect,
+        isMuuriInitialized: true,
+      };
+    }
+
+    return 'Muuri not initialized';
+  });
+
+  console.log('\n🧩 Muuri grid status:', muuriStatus);
+
+  // Take second screenshot after analysis
+  await page.screenshot({ path: 'masonry-after-analysis.png', fullPage: true });
+  console.log('📸 Screenshot saved: masonry-after-analysis.png');
+
+  // Keep browser open for manual inspection
+  console.log('\n⏳ Keeping browser open for 30 seconds for manual inspection...');
+  await page.waitForTimeout(30000);
+
+  await browser.close();
+  console.log('✅ Test complete');
+}
+
+testMasonryLayout().catch(console.error);