v0.9.21 added a cleanup routibe for deleted images.

backend/src/routes/messages.js

@@ -1,8 +1,20 @@
 const express = require('express');
 const multer = require('multer');
 const path = require('path');
+const fs = require('fs');
 const { getDb } = require('../models/db');
 
+// Delete an uploaded image file from disk if it lives under /app/uploads/images
+function deleteImageFile(imageUrl) {
+  if (!imageUrl) return;
+  try {
+    const filePath = '/app' + imageUrl; // imageUrl is like /uploads/images/img_xxx.jpg
+    if (fs.existsSync(filePath)) fs.unlinkSync(filePath);
+  } catch (e) {
+    console.warn('[Messages] Could not delete image file:', e.message);
+  }
+}
+
 module.exports = function(io) {
 const router = express.Router();
 const { authMiddleware } = require('../middleware/auth');
@@ -150,7 +162,9 @@ router.delete('/:id', authMiddleware, (req, res) => {
 
   if (!canDelete) return res.status(403).json({ error: 'Cannot delete this message' });
 
+  const imageUrl = message.image_url;
   db.prepare("UPDATE messages SET is_deleted = 1, content = null, image_url = null WHERE id = ?").run(message.id);
+  deleteImageFile(imageUrl);
   io.to(`group:${message.group_id}`).emit('message:deleted', { messageId: message.id, groupId: message.group_id });
   res.json({ success: true, messageId: message.id });
 });