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/components/ui/label.tsx

@@ -0,0 +1,16 @@
+import * as React from "react"
+import { cn } from "@/lib/utils"
+
+export interface LabelProps extends React.LabelHTMLAttributes<HTMLLabelElement> {}
+
+export function Label({ className, ...props }: LabelProps) {
+  return (
+    <label
+      className={cn(
+        "text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70",
+        className
+      )}
+      {...props}
+    />
+  )
+}