fix: watch providers.jsonc for external edits so UI refreshes without restart

src/node/config.ts

@@ -1878,6 +1878,32 @@ export class Config {
     return null;
   }
 
+  /**
+   * Watch providers.jsonc for external edits. Fires callback (debounced 300 ms)
+   * on any create/modify/delete event. Returns a cleanup function.
+   *
+   * We watch the parent directory rather than the file directly so that
+   * creates (first-time manual edit) are also detected on all platforms.
+   */
+  watchProvidersFile(callback: () => void): () => void {
+    const filename = path.basename(this.providersFile);
+    let debounceTimer: ReturnType<typeof setTimeout> | null = null;
+
+    const watcher = fs.watch(this.rootDir, (_eventType, changedFilename) => {
+      if (changedFilename !== filename) return;
+      if (debounceTimer) clearTimeout(debounceTimer);
+      debounceTimer = setTimeout(() => {
+        debounceTimer = null;
+        callback();
+      }, 300);
+    });
+
+    return () => {
+      if (debounceTimer) clearTimeout(debounceTimer);
+      watcher.close();
+    };
+  }
+
   /**
    * Save providers configuration to JSONC file
    * @param config The providers configuration to save

src/node/services/providerService.ts

@@ -141,6 +141,8 @@ export class ProviderService {
     // The provider config subscription may have many concurrent listeners (e.g. multiple windows).
     // Avoid noisy MaxListenersExceededWarning for normal usage.
     this.emitter.setMaxListeners(50);
+    // Notify subscribers when providers.jsonc is edited externally (e.g. manual edits).
+    this.config.watchProvidersFile(() => this.notifyConfigChanged());
   }
 
   /**