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/app/api/admin/sync-labels/route.ts

@@ -0,0 +1,57 @@
+import { NextResponse } from 'next/server';
+import prisma from '@/lib/prisma';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET() {
+  try {
+    // 1. Get all notes
+    const notes = await prisma.note.findMany({
+      select: { labels: true }
+    });
+
+    // 2. Extract all unique labels from JSON
+    const uniqueLabels = new Set<string>();
+    notes.forEach((note: any) => {
+      if (note.labels) {
+        try {
+          const parsed = JSON.parse(note.labels);
+          if (Array.isArray(parsed)) {
+            parsed.forEach((l: string) => uniqueLabels.add(l));
+          }
+        } catch (e) {
+          // ignore error
+        }
+      }
+    });
+
+    // 3. Get existing labels in DB
+    const existingDbLabels = await prisma.label.findMany();
+    const existingNames = new Set(existingDbLabels.map((l: any) => l.name));
+
+    // 4. Create missing labels
+    const created = [];
+    for (const name of uniqueLabels) {
+      if (!existingNames.has(name)) {
+        const newLabel = await prisma.label.create({
+          data: {
+            name,
+            color: 'gray' // Default color
+          }
+        });
+        created.push(newLabel);
+      }
+    }
+
+    return NextResponse.json({
+      success: true,
+      foundInNotes: uniqueLabels.size,
+      alreadyInDb: existingNames.size,
+      created: created.length,
+      createdLabels: created
+    });
+
+  } catch (error) {
+    return NextResponse.json({ error: String(error) }, { status: 500 });
+  }
+}