Refactor view modules for improved readability and consistency

- Updated markdown rendering logic to use more concise methods for obtaining vector lengths.
- Changed review status display to use the correct flag from settings.
- Cleaned up sidebar rendering code for better formatting and readability.
- Enhanced status bar rendering with improved string formatting and consistent style application.
- Refined workflow panel rendering, ensuring consistent style usage and improved readability.
- Added architecture overview and detailed documentation for backend, data, dependencies, and frontend structures.

src/app/subagent/spawn.rs

@@ -1,6 +1,5 @@
 //! `AgentDefinition` -- declarative specification for instantiating a
 //! subagent from workflow scripts or programmatic calls.
-
 use serde::{Deserialize, Serialize};
 
 /// Declarative specification for instantiating a subagent: name, role,
@@ -29,13 +28,6 @@ impl AgentDefinition {
         }
     }
 
-    /// Builder method: limit this agent to at most `steps` LLM calls.
-    #[allow(dead_code)]
-    pub fn with_max_steps(mut self, steps: usize) -> Self {
-        self.max_steps = Some(steps);
-        self
-    }
-
     /// Builder method: set the system prompt for this agent.
     pub fn with_system_prompt(mut self, prompt: String) -> Self {
         self.system_prompt = Some(prompt);