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/tests/search-quality.spec.ts

@@ -0,0 +1,63 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Search Quality Tests', () => {
+  
+  test.beforeEach(async ({ page }) => {
+    // 1. Go to Home
+    await page.goto('/');
+    
+    // Handle Login if redirected (Mock behavior or real login)
+    if (page.url().includes('login')) {
+      // Assuming a simple dev login or we need to bypass. 
+      // For this environment, let's try to just continue or fail explicitly if stuck.
+      console.log('Redirected to login. Please ensure you are logged in for tests.');
+    }
+  });
+
+  test('should find notes by semantic concept', async ({ page }) => {
+    // Clean up existing notes to avoid noise? (Optional, better to just create unique ones)
+    const timestamp = Date.now();
+    const techTitle = `React Tech ${timestamp}`;
+    const foodTitle = `Italian Food ${timestamp}`;
+    
+    // 2. Create Tech Note
+    await page.getByPlaceholder('Take a note...').click();
+    await page.getByPlaceholder('Title').fill(techTitle);
+    await page.getByPlaceholder('Take a note...').fill('Hooks, useEffect, State management, Components logic.');
+    await page.getByRole('button', { name: 'Close' }).click();
+    await expect(page.getByText(techTitle)).toBeVisible();
+
+    // 3. Create Food Note
+    await page.getByPlaceholder('Take a note...').click();
+    await page.getByPlaceholder('Title').fill(foodTitle);
+    await page.getByPlaceholder('Take a note...').fill('Tomato sauce, Basil, Parmesan cheese, boiling water.');
+    await page.getByRole('button', { name: 'Close' }).click();
+    await expect(page.getByText(foodTitle)).toBeVisible();
+
+    // Wait a bit for potential async indexing (even if server action is awaited, good practice)
+    await page.waitForTimeout(2000);
+
+    // 4. Search for "Coding" (Semantic match for React)
+    const searchInput = page.getByPlaceholder('Search');
+    await searchInput.fill('Coding');
+    await searchInput.press('Enter');
+    
+    // Allow time for search results
+    await page.waitForTimeout(1000);
+
+    // Assertions
+    // Tech note should be visible
+    await expect(page.getByText(techTitle)).toBeVisible();
+    // Food note should NOT be visible (or at least ranked lower/hidden if filtering is strict)
+    await expect(page.getByText(foodTitle)).toBeHidden();
+
+    // 5. Search for "Cooking" (Semantic match for Food)
+    await searchInput.fill('');
+    await searchInput.fill('Cooking dinner');
+    await searchInput.press('Enter');
+    await page.waitForTimeout(1000);
+
+    await expect(page.getByText(foodTitle)).toBeVisible();
+    await expect(page.getByText(techTitle)).toBeHidden();
+  });
+});