Add unified port configuration system

- Unified API and WebUI on single configurable port (default: 4567)
- Added strix.yaml configuration file support (go2rtc-style format)
- Environment variable STRIX_API_LISTEN overrides config file
- Port validation and source logging
- Relative URLs in frontend for automatic port detection
- Removed separate server instances
- Cleaned up temporary files and updated .gitignore
- Updated documentation with configuration examples

webui/web/js/api/camera-search.js

@@ -1,9 +1,8 @@
 export class CameraSearchAPI {
     constructor(baseURL = null) {
-        // Auto-detect API URL based on current host
+        // Use relative URLs since API and UI are on the same port
         if (!baseURL) {
-            const currentHost = window.location.hostname;
-            this.baseURL = `http://${currentHost}:8080`;
+            this.baseURL = '';
         } else {
             this.baseURL = baseURL;
         }

webui/web/js/api/stream-discovery.js

@@ -1,9 +1,8 @@
 export class StreamDiscoveryAPI {
     constructor(baseURL = null) {
-        // Auto-detect API URL based on current host
+        // Use relative URLs since API and UI are on the same port
         if (!baseURL) {
-            const currentHost = window.location.hostname;
-            this.baseURL = `http://${currentHost}:8080`;
+            this.baseURL = '';
         } else {
             this.baseURL = baseURL;
         }