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/editor-images.tsx

@@ -0,0 +1,33 @@
+import { Button } from "@/components/ui/button"
+import { X } from "lucide-react"
+
+interface EditorImagesProps {
+  images: string[]
+  onRemove: (index: number) => void
+}
+
+export function EditorImages({ images, onRemove }: EditorImagesProps) {
+  if (!images || images.length === 0) return null
+
+  return (
+    <div className="flex flex-col gap-3 mb-4">
+      {images.map((img, idx) => (
+        <div key={idx} className="relative group">
+          <img 
+            src={img} 
+            alt="" 
+            className="h-auto rounded-lg"
+          />
+          <Button
+            variant="ghost"
+            size="sm"
+            className="absolute top-2 right-2 h-7 w-7 p-0 bg-white/90 hover:bg-white opacity-0 group-hover:opacity-100 transition-opacity"
+            onClick={() => onRemove(idx)}
+          >
+            <X className="h-4 w-4" />
+          </Button>
+        </div>
+      ))}
+    </div>
+  )
+}