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/tool/mod.rs

@@ -148,12 +148,12 @@ pub fn tool_is_risky(name: &str) -> bool {
     matches!(name, "write" | "delete" | "edit" | "bash" | "git_operator")
 }
 
-pub fn tool_defs(tools: &[Box<dyn Tool>]) -> Vec<crate::dto::openrouter::request::ToolDef> {
+pub fn tool_defs(tools: &[Box<dyn Tool>]) -> Vec<crate::dto::provider::request::ToolDef> {
     tools
         .iter()
-        .map(|t| crate::dto::openrouter::request::ToolDef {
+        .map(|t| crate::dto::provider::request::ToolDef {
             type_: "function".to_string(),
-            function: crate::dto::openrouter::request::ToolFunctionDef {
+            function: crate::dto::provider::request::ToolFunctionDef {
                 name: t.name().to_string(),
                 description: t.description().to_string(),
                 parameters: t.parameters(),