feat: database backups & analytics site management

- Added manual database backup functionality with pg_dump
- Added cron-based automated backups to Google Drive and Dropbox
- Added ability to manually add, edit, and delete sites in Analytics
- Added 1-day timeframe filter in Analytics page
- Updated Dockerfile to include postgresql-client

src/app/api/db/backup/route.ts

@@ -0,0 +1,47 @@
+import { NextResponse } from 'next/server'
+import { readConfig } from '@/lib/config'
+import { createPgDumpStream } from '@/lib/backup'
+
+// GET /api/db/backup?dbId=...
+export async function GET(req: Request) {
+  const { searchParams } = new URL(req.url)
+  const dbId = searchParams.get('dbId')
+  if (!dbId) return NextResponse.json({ error: 'Missing dbId' }, { status: 400 })
+
+  const config = await readConfig()
+  const db = config.databases.find(d => d.id === dbId)
+  if (!db) return NextResponse.json({ error: 'Database not found' }, { status: 404 })
+
+  try {
+    const child = await createPgDumpStream(db)
+    const dateStr = new Date().toISOString().replace(/[:.]/g, '-')
+    const filename = `${db.name}_${dateStr}.sql`
+
+    // Stream the output of pg_dump to the response
+    const stream = new ReadableStream({
+      start(controller) {
+        child.stdout.on('data', (chunk) => controller.enqueue(chunk))
+        child.on('close', (code) => {
+          if (code === 0) {
+            controller.close()
+          } else {
+            controller.error(new Error(`pg_dump exited with code ${code}`))
+          }
+        })
+        child.on('error', (err) => controller.error(err))
+      },
+      cancel() {
+        child.kill()
+      }
+    })
+
+    return new NextResponse(stream, {
+      headers: {
+        'Content-Type': 'application/sql',
+        'Content-Disposition': `attachment; filename="${filename}"`
+      }
+    })
+  } catch (e: any) {
+    return NextResponse.json({ error: e.message }, { status: 500 })
+  }
+}