## QA PASSED See QA report document: dca9a6f7-fe29-43da-bf4e-0f2c558e3c25 **Verification Results:** - TTYD_BASE_URL environment variable is correctly configured in Docker container - API returns terminal URLs with external IP (http://23.93.151.210:7681/) instead of localhost:7681 - Frontend iframe uses the URL directly from API without modification **The original bug (iframe connecting to localhost) is FIXED.** Note: ttyd terminals not actually running is a separate architectural issue (Docker cannot spawn host processes), unrelated to APLANE-25.

Fixed terminal URL generation to use configurable TTYD_BASE_URL instead of hardcoded localhost. **Changes made:** 1. **backend/config.py** (line 38-45): Added TTYD_BASE_URL configuration option - Reads from environment variable TTYD_BASE_URL - Default: http://localhost: (for local development) - For production: set to http://<server-ip>: for direct port access 2. **backend/services/screen_manager.py** (line 174-194): Added build_terminal_url() helper function - Supports port-based URLs (http://host:7681/) - Supports path-based URLs (https://proxy/port/7681/) - Updated create_screen() at line 461 to use this function - Updated restart_ttyd_with_new_font_size() at line 672 to use this function 3. **docker-compose.yml** (line 35-39): Added TTYD_BASE_URL environment variable 4. **.env.example** (line 42-59): Documented TTYD_BASE_URL configuration 5. **.env.production** (line 21-24): Set production value to http://23.93.151.210: 6. **.env** (line 31-34): Set TTYD_BASE_URL for current deployment **Testing:** - Syntax validation passed for all Python files - Unit test of build_terminal_url() function passed for all URL patterns **Deployment note:** For the fix to take effect, the backend service needs to be restarted with the new TTYD_BASE_URL environment variable. The ttyd ports (7681+) must be accessible from the browser.