feat: add BlockRun wallet provider for pay-per-request AI access (#1408)

Integrates BlockRun (blockrun.ai) as a new AI provider option via x402
micropayment protocol, allowing users to access top AI models with USDC
without requiring individual API keys.

- Add BlockRun Base (EVM) and Solana wallet providers to model selector
- Implement x402 v2 EIP-712 payment signing for Base (mcp/blockrun_base.go)
- Implement x402 v2 SPL TransferChecked signing for Solana (mcp/blockrun_sol.go)
- Wire blockrun-base and blockrun-sol into trader factory (auto_trader.go)
- Register both providers in supported models API (server.go)
- Add BlockRun card UI with wallet key input in Step 0/1 of model config modal
- Add BlockRun SVG icon and ModelIcons support
- Add setup guides for Base and Solana wallet configuration (docs/)
- Available flagship models: GPT-5.4, Claude Opus 4.6, Gemini 3.1 Pro,
  Grok 3, DeepSeek Chat, MiniMax M2.5

api/server.go

@@ -143,6 +143,7 @@ func (s *Server) setupRoutes() {
 		// Authentication related routes (no authentication required)
 		api.POST("/register", s.handleRegister)
 		api.POST("/login", s.handleLogin)
+		api.POST("/reset-password", s.handleResetPassword)
 
 		// Routes requiring authentication
 		protected := api.Group("/", s.authMiddleware())
@@ -3264,6 +3265,8 @@ func (s *Server) handleGetSupportedModels(c *gin.Context) {
 		{"id": "grok", "name": "Grok (xAI)", "provider": "grok", "defaultModel": "grok-3-latest"},
 		{"id": "kimi", "name": "Kimi (Moonshot)", "provider": "kimi", "defaultModel": "moonshot-v1-auto"},
 		{"id": "minimax", "name": "MiniMax", "provider": "minimax", "defaultModel": "MiniMax-M2.5"},
+		{"id": "blockrun-base", "name": "BlockRun (Base Wallet)", "provider": "blockrun-base", "defaultModel": "auto"},
+		{"id": "blockrun-sol", "name": "BlockRun (Solana Wallet)", "provider": "blockrun-sol", "defaultModel": "auto"},
 	}
 
 	c.JSON(http.StatusOK, supportedModels)