Refactor API integration and enhance command handling

- Removed unused modules and updated module paths for clarity.
- Added autocomplete functionality for command input in InputState.
- Updated AppStateRest to include a method for checking if a turn is in flight.
- Refactored subagent engine to use new API client structure.
- Changed default provider from "openrouter" to "zen" with updated API keys and models.
- Implemented tests for memory management and edit log functionalities.
- Enhanced error handling in API requests and improved response parsing.
- Updated UI components to reflect new API provider and status indicators.

src/model/app_config.rs

@@ -27,23 +27,23 @@ pub struct ModelRole {
 impl Default for AppConfig {
     fn default() -> Self {
         let mut providers = HashMap::new();
-        providers.insert("openrouter".to_string(), ProviderConfig {
-            api_base: "https://openrouter.ai/api/v1".to_string(),
-            api_key_env: Some("OPENROUTER_API_KEY".to_string()),
-            default_model: Some("anthropic/claude-opus-4-8".to_string()),
+        providers.insert("zen".to_string(), ProviderConfig {
+            api_base: "https://opencode.ai/zen/v1".to_string(),
+            api_key_env: Some("API_KEY".to_string()),
+            default_model: Some("deepseek-v4-flash-free".to_string()),
         });
         let mut model_roles = HashMap::new();
         model_roles.insert("default".to_string(), ModelRole {
-            provider: "openrouter".to_string(),
-            model: "anthropic/claude-opus-4-8".to_string(),
+            provider: "zen".to_string(),
+            model: "deepseek-v4-flash-free".to_string(),
             max_tokens: Some(8192),
             temperature: Some(0.7),
         });
         AppConfig {
             providers,
             model_roles,
-            default_provider: "openrouter".to_string(),
-            default_model: "anthropic/claude-opus-4-8".to_string(),
+            default_provider: "zen".to_string(),
+            default_model: "deepseek-v4-flash-free".to_string(),
         }
     }
 }