Implement auth token persistence and MCP connection improvements

- Add OpenRouter API key persistence to localStorage with auto-restore
- Add automatic provider restoration on app startup for seamless login
- Fix MCP OAuth token persistence by preserving connection IDs across refreshes
- Add manual reconnect button for failed/disconnected MCP servers
- Add auto-reconnect for MCP servers on app startup
- Maintain backward compatibility with old connection storage format

Resolves auth token loss on page refresh for both inference and MCP providers.

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

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

src/components/MCPStatus.tsx

@@ -4,7 +4,7 @@ import React from 'react';
 import { useMCP } from '@/contexts/MCPContext';
 
 export function MCPStatus() {
-  const { connections, getAllTools } = useMCP();
+  const { connections, getAllTools, reconnectServer } = useMCP();
   
   const connectedServers = connections.filter(conn => conn.status === 'connected');
   const allTools = getAllTools();
@@ -89,6 +89,16 @@ export function MCPStatus() {
                         </p>
                       )}
                     </div>
+                    
+                    {(connection.status === 'failed' || connection.status === 'disconnected') && (
+                      <button
+                        onClick={() => reconnectServer(connection.id)}
+                        className="ml-2 px-2 py-1 text-xs bg-blue-100 dark:bg-blue-900/50 text-blue-800 dark:text-blue-200 rounded hover:bg-blue-200 dark:hover:bg-blue-800"
+                        title="Reconnect server"
+                      >
+                        Reconnect
+                      </button>
+                    )}
                   </div>
                   
                   {connection.tools.length > 0 && (

src/contexts/InferenceContext.tsx

@@ -1,12 +1,14 @@
 // React context for inference provider management
 
-import React, { createContext, useContext, useState, useCallback, ReactNode } from 'react';
+import React, { createContext, useContext, useState, useCallback, useEffect, ReactNode } from 'react';
 import type {
   InferenceProvider,
   InferenceRequest,
   InferenceResponse,
   Model,
 } from '@/types/inference';
+import { OpenRouterApiProvider } from '@/providers/openrouter/api-provider';
+import { OpenRouterOAuthProvider } from '@/providers/openrouter/oauth-provider';
 
 interface InferenceContextValue {
   // Current provider state
@@ -64,6 +66,27 @@ export function InferenceProvider({ children }: InferenceProviderProps) {
     setAuthStateVersion(prev => prev + 1);
   }, []);
 
+  // Auto-restore provider with stored credentials on mount
+  useEffect(() => {
+    const tryRestoreProvider = async () => {
+      // Try API provider first
+      const apiProvider = new OpenRouterApiProvider();
+      if (apiProvider.isAuthenticated) {
+        setProvider(apiProvider);
+        return;
+      }
+
+      // Try OAuth provider
+      const oauthProvider = new OpenRouterOAuthProvider();
+      if (oauthProvider.isAuthenticated) {
+        setProvider(oauthProvider);
+        return;
+      }
+    };
+
+    tryRestoreProvider().catch(console.error);
+  }, [setProvider]);
+
   const generateResponse = useCallback(async (request: InferenceRequest): Promise<InferenceResponse> => {
     if (!provider) {
       throw new Error('No inference provider configured');

src/contexts/MCPContext.tsx

@@ -39,22 +39,42 @@ export function MCPProvider({ children }: MCPProviderProps) {
       try {
         const persistedData = localStorage.getItem('mcp_connections');
         if (persistedData) {
-          const persistedConfigs: MCPServerConfig[] = JSON.parse(persistedData);
+          const persistedData_parsed = JSON.parse(persistedData);
           
-          // Restore connections directly without using addMcpServer to avoid loops
-          for (const config of persistedConfigs) {
+          // Handle both old format (array of configs) and new format (array of {id, config})
+          const persistedConnections = Array.isArray(persistedData_parsed) && persistedData_parsed.length > 0
+            ? (typeof persistedData_parsed[0] === 'object' && 'config' in persistedData_parsed[0]
+                ? persistedData_parsed as {id: string, config: MCPServerConfig}[]
+                : persistedData_parsed.map((config: MCPServerConfig) => ({id: uuidv4(), config})))
+            : [];
+          
+          // Restore connections and auto-reconnect
+          for (const {id: connectionId, config} of persistedConnections) {
             try {
-              const connectionId = uuidv4();
               const manager = new MCPConnectionManager(connectionId, config);
               
+              // Set up callback for connection state updates
+              manager.setConnectionUpdateCallback(() => {
+                setConnections(prev => 
+                  prev.map(conn => 
+                    conn.id === connectionId ? manager.getConnection() : conn
+                  )
+                );
+              });
+              
               // Add to managers map
               setManagers(prev => new Map(prev).set(connectionId, manager));
               
               // Add initial connection state
               setConnections(prev => [...prev, manager.getConnection()]);
               
-              // Don't auto-connect during restoration - let user manually connect
-              console.log(`Restored connection config for ${config.name}`);
+              // Auto-connect on restoration
+              try {
+                await manager.connect();
+                console.log(`Auto-reconnected to ${config.name}`);
+              } catch (error) {
+                console.warn(`Failed to auto-reconnect to ${config.name}:`, error);
+              }
             } catch (error) {
               console.warn(`Failed to restore connection to ${config.name}:`, error);
             }
@@ -70,8 +90,12 @@ export function MCPProvider({ children }: MCPProviderProps) {
 
   const persistConnections = useCallback(() => {
     try {
-      const configs = connections.map(conn => conn.config);
-      localStorage.setItem('mcp_connections', JSON.stringify(configs));
+      // Store both config and connection ID to maintain OAuth token association
+      const connectionData = connections.map(conn => ({
+        id: conn.id,
+        config: conn.config
+      }));
+      localStorage.setItem('mcp_connections', JSON.stringify(connectionData));
     } catch (error) {
       console.error('Failed to persist MCP connections:', error);
     }

src/providers/openrouter/api-provider.ts

@@ -31,6 +31,9 @@ export class OpenRouterApiProvider extends InferenceProvider {
     if (config?.defaultModel) {
       // We'll set this after loading models
     }
+    
+    // Load stored API key
+    this.loadStoredApiKey();
   }
 
   get isAuthenticated(): boolean {
@@ -60,6 +63,9 @@ export class OpenRouterApiProvider extends InferenceProvider {
     try {
       // Test the API key by loading models
       await this.loadModels();
+      
+      // Store API key after successful validation
+      this.storeApiKey();
     } catch (error) {
       this._authError = error instanceof Error ? error.message : 'Authentication failed';
       this.apiKey = undefined;
@@ -72,6 +78,7 @@ export class OpenRouterApiProvider extends InferenceProvider {
     this._authError = undefined;
     this._models = [];
     this._selectedModel = undefined;
+    this.clearStoredApiKey();
   }
 
   async loadModels(): Promise<Model[]> {
@@ -152,4 +159,26 @@ export class OpenRouterApiProvider extends InferenceProvider {
   private isInferenceError(error: any): error is InferenceError {
     return error && typeof error === 'object' && 'type' in error && 'message' in error;
   }
+
+  private storeApiKey(): void {
+    if (this.apiKey) {
+      localStorage.setItem('openrouter_api_key', this.apiKey);
+    }
+  }
+
+  private loadStoredApiKey(): void {
+    const storedKey = localStorage.getItem('openrouter_api_key');
+    if (storedKey) {
+      this.apiKey = storedKey;
+      // Try to load models to verify the key is still valid
+      this.loadModels().catch(() => {
+        // If loading fails, clear invalid key
+        this.logout();
+      });
+    }
+  }
+
+  private clearStoredApiKey(): void {
+    localStorage.removeItem('openrouter_api_key');
+  }
 }