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/scripts/verify-size.ts

@@ -0,0 +1,56 @@
+
+import { prisma } from '../lib/prisma'
+import { updateSize } from '../app/actions/notes'
+
+async function main() {
+    console.log('🧪 Starting Note Size Persistence Verification...')
+
+    // 1. Create a test note
+    const note = await prisma.note.create({
+        data: {
+            content: 'Size Test Note',
+            userId: (await prisma.user.findFirst())?.id || '',
+            size: 'small', // Start small
+        }
+    })
+    console.log(`📝 Created test note (${note.id}) with size: ${note.size}`)
+
+    if (!note.userId) {
+        console.error('❌ No user found to create note. Aborting.')
+        return
+    }
+
+    try {
+        // 2. Update size to LARGE
+        console.log('🔄 Updating size to LARGE...')
+        // We mock the session for the action or call prisma directly if action fails (actions usually need auth context)
+        // Since we're running as script, we'll use prisma update directly to simulate what the action does at DB level
+        // OR we can try to invoke the action if we can mock auth. 
+        // Let's test the DB interaction first which is the critical "persistence" part.
+
+        await prisma.note.update({
+            where: { id: note.id },
+            data: { size: 'large' }
+        })
+
+        // 3. Fetch back
+        const updatedNote = await prisma.note.findUnique({ where: { id: note.id } })
+        console.log(`🔍 Fetched note after update. Size is: ${updatedNote?.size}`)
+
+        if (updatedNote?.size === 'large') {
+            console.log('✅ BACKEND PERSISTENCE: PASSED')
+        } else {
+            console.error('❌ BACKEND PERSISTENCE: FAILED (Size reverted or did not update)')
+        }
+
+    } catch (error) {
+        console.error('❌ Error during test:', error)
+    } finally {
+        // Cleanup
+        await prisma.note.delete({ where: { id: note.id } })
+        console.log('🧹 Cleaned up test note')
+        await prisma.$disconnect()
+    }
+}
+
+main().catch(console.error)