Refactor scrolling methods in ScrollState to accept an amount parameter

- Updated `scroll_up` and `scroll_down` methods to take an `amount` parameter for more flexible scrolling.
- Removed the `AgentMode` enum and related methods from the types module to simplify state management.
- Modified `AppStateRest` to remove the `mode` field and adjusted related logic.
- Enhanced `run_subagent` to build tool definitions and handle API key resolution from configuration.
- Updated command parsing to reflect changes in login handling.
- Removed onboarding overlays and related logic from input handling and rendering.
- Improved status bar to reflect connection status and agent readiness.
- Adjusted workflow panel rendering to simplify phase status display.
- Refactored edit log initialization to load from disk if available.
- Updated settings structure to use a HashMap for API keys.
- Enhanced error handling in LlmClient for authentication issues.

src/tool/utility/dir_cache_update.rs

@@ -42,9 +42,11 @@ impl Tool for DirCacheUpdate {
         let count = entries.len();
         let dc = ctx.dir_cache.clone();
 
-        let rt = tokio::runtime::Handle::try_current()
-            .map_err(|e| anyhow!("no tokio runtime available: {}", e))?;
-        rt.block_on(async move {
+        // Create a one-shot runtime so this tool works from any thread (the
+        // agent turn runs on a std::thread that has no tokio context).
+        let rt = tokio::runtime::Runtime::new()
+            .map_err(|e| anyhow!("failed to create temp runtime: {}", e))?;
+        rt.block_on(async {
             let cache = dc.write().await;
             cache.set(entries).await;
         });