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/notebook-actions.tsx

@@ -0,0 +1,55 @@
+'use client'
+
+import { Edit2, MoreVertical, FileText } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { useLanguage } from '@/lib/i18n'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@/components/ui/dropdown-menu'
+
+interface NotebookActionsProps {
+  notebook: any
+  onEdit: () => void
+  onDelete: () => void
+  onSummary?: () => void // NEW: Summary action callback (IA6)
+}
+
+export function NotebookActions({ notebook, onEdit, onDelete, onSummary }: NotebookActionsProps) {
+  const { t } = useLanguage()
+  return (
+    <div className="opacity-0 group-hover:opacity-100 transition-opacity flex items-center">
+      <DropdownMenu>
+        <DropdownMenuTrigger asChild>
+          <Button
+            variant="ghost"
+            size="sm"
+            className="h-8 w-8 p-0"
+          >
+            <MoreVertical className="h-3 w-3" />
+          </Button>
+        </DropdownMenuTrigger>
+        <DropdownMenuContent align="end">
+          {onSummary && (
+            <DropdownMenuItem onClick={onSummary}>
+              <FileText className="h-4 w-4 mr-2" />
+              {t('notebook.summary')}
+            </DropdownMenuItem>
+          )}
+          <DropdownMenuItem onClick={onEdit}>
+            <Edit2 className="h-4 w-4 mr-2" />
+            {t('notebook.edit')}
+          </DropdownMenuItem>
+          <DropdownMenuItem
+            onClick={onDelete}
+            className="text-red-600"
+          >
+            {t('notebook.delete')}
+          </DropdownMenuItem>
+        </DropdownMenuContent>
+      </DropdownMenu>
+    </div>
+  )
+}