Update middleware to ADD security headers for browsers

Middleware now:
- Detects mobile app vs browser via User-Agent
- Mobile app: Removes frame-blocking headers (allows iframe)
- Browsers: Adds CSP and X-Frame-Options headers (security)

This ensures:
✓ Browsers get full CSP protection
✓ Mobile app can embed content
✓ No need for django-csp package
✓ All security managed in one place

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

tasks/middleware/mobile_app.py

@@ -26,7 +26,6 @@ class AllowMobileAppFramingMiddleware:
         user_agent = request.META.get('HTTP_USER_AGENT', '')
 
         # Detect Capacitor/Android WebView patterns
-        # Note: We're being permissive here to catch all mobile app requests
         is_mobile_app = (
             'wv' in user_agent.lower() or  # Android WebView
             'CapacitorHttp' in user_agent or
@@ -34,19 +33,29 @@ class AllowMobileAppFramingMiddleware:
             ('KeepItGoing' in user_agent and 'Mobile' in user_agent)
         )
 
-        # Remove frame-blocking headers for mobile app requests
         if is_mobile_app:
-            # Remove X-Frame-Options
+            # Mobile app: Allow iframe embedding - don't add frame-blocking headers
+            # Remove any existing frame headers
             if 'X-Frame-Options' in response:
                 del response['X-Frame-Options']
-
-            # Remove or modify Content-Security-Policy
             if 'Content-Security-Policy' in response:
-                csp = response['Content-Security-Policy']
-                # Remove frame-ancestors directive
-                if 'frame-ancestors' in csp:
-                    # Remove the entire CSP header for simplicity
-                    # In production, you'd want to parse and modify it properly
-                    del response['Content-Security-Policy']
+                del response['Content-Security-Policy']
+        else:
+            # Regular browsers: Add security headers for clickjacking protection
+            if 'X-Frame-Options' not in response:
+                response['X-Frame-Options'] = 'DENY'
+
+            if 'Content-Security-Policy' not in response:
+                response['Content-Security-Policy'] = (
+                    "default-src 'self'; "
+                    "script-src 'self' 'unsafe-inline'; "
+                    "style-src 'self' 'unsafe-inline'; "
+                    "img-src 'self' data: https:; "
+                    "font-src 'self' data:; "
+                    "connect-src 'self'; "
+                    "frame-ancestors 'none'; "
+                    "base-uri 'self'; "
+                    "form-action 'self';"
+                )
 
         return response