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/app/subagent/spawn.rs

@@ -22,8 +22,23 @@ impl AgentDefinition {
         }
     }
 
+    pub fn with_system_prompt(mut self, prompt: String) -> Self {
+        self.system_prompt = Some(prompt);
+        self
+    }
+
+    pub fn with_allowed_tools(mut self, tools: Vec<String>) -> Self {
+        self.allowed_tools = Some(tools);
+        self
+    }
+
     pub fn with_max_steps(mut self, steps: usize) -> Self {
         self.max_steps = Some(steps);
         self
     }
+
+    pub fn with_temperature(mut self, temp: f32) -> Self {
+        self.temperature = Some(temp);
+        self
+    }
 }