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/note-checklist.tsx

@@ -0,0 +1,42 @@
+import { CheckItem } from "@/lib/types"
+import { Checkbox } from "@/components/ui/checkbox"
+import { cn } from "@/lib/utils"
+
+interface NoteChecklistProps {
+  items: CheckItem[]
+  onToggleItem: (itemId: string) => void
+}
+
+export function NoteChecklist({ items, onToggleItem }: NoteChecklistProps) {
+  if (!items || items.length === 0) return null
+
+  return (
+    <div className="space-y-1">
+      {items.map((item) => (
+        <div
+          key={item.id}
+          className="flex items-start gap-2"
+          onClick={(e) => {
+            e.stopPropagation()
+            onToggleItem(item.id)
+          }}
+        >
+          <Checkbox
+            checked={item.checked}
+            className="mt-0.5"
+          />
+          <span
+            className={cn(
+              'text-sm',
+              item.checked
+                ? 'line-through text-gray-500 dark:text-gray-500'
+                : 'text-gray-700 dark:text-gray-300'
+            )}
+          >
+            {item.text}
+          </span>
+        </div>
+      ))}
+    </div>
+  )
+}