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/settings/SettingToggle.tsx

@@ -0,0 +1,73 @@
+'use client'
+
+import { useState } from 'react'
+import { Switch } from '@/components/ui/switch'
+import { Label } from '@/components/ui/label'
+import { Loader2, Check, X } from 'lucide-react'
+import { cn } from '@/lib/utils'
+import { toast } from 'sonner'
+import { useLanguage } from '@/lib/i18n'
+
+interface SettingToggleProps {
+  label: string
+  description?: string
+  checked: boolean
+  onChange: (checked: boolean) => Promise<void>
+  disabled?: boolean
+}
+
+export function SettingToggle({
+  label,
+  description,
+  checked,
+  onChange,
+  disabled
+}: SettingToggleProps) {
+  const { t } = useLanguage()
+  const [isLoading, setIsLoading] = useState(false)
+  const [error, setError] = useState(false)
+
+  const handleChange = async (newChecked: boolean) => {
+    setIsLoading(true)
+    setError(false)
+
+    try {
+      await onChange(newChecked)
+      toast.success(t('toast.saved'))
+    } catch (err) {
+      console.error('Error updating setting:', err)
+      setError(true)
+      toast.error(t('toast.saveFailed'))
+    } finally {
+      setIsLoading(false)
+    }
+  }
+
+  return (
+    <div className={cn(
+      'flex items-center justify-between py-4',
+      'border-b last:border-0 dark:border-gray-800'
+    )}>
+      <div className="flex-1 pr-4">
+        <Label className="font-medium text-gray-900 dark:text-gray-100 cursor-pointer">
+          {label}
+        </Label>
+        {description && (
+          <p className="text-sm text-gray-600 dark:text-gray-400 mt-1">
+            {description}
+          </p>
+        )}
+      </div>
+      <div className="flex items-center gap-2">
+        {isLoading && <Loader2 className="h-4 w-4 animate-spin text-gray-500" />}
+        {!isLoading && !error && checked && <Check className="h-4 w-4 text-green-500" />}
+        {!isLoading && !error && !checked && <X className="h-4 w-4 text-gray-400" />}
+        <Switch
+          checked={checked}
+          onCheckedChange={handleChange}
+          disabled={disabled || isLoading}
+        />
+      </div>
+    </div>
+  )
+}