feat: enhance strictness of Rust compiler settings and improve code quality by treating warnings as errors

src/app/state/rest.rs

@@ -52,7 +52,6 @@ pub struct AppStateRest {
     pub session_id: String,
     pub session_dir: PathBuf,
     pub memory_dir: PathBuf,
-    pub download_dir: PathBuf,
     pub worktrees_dir: PathBuf,
     pub dir_cache: Arc<RwLock<DirCache>>,
     pub edit_log: EditLog,
@@ -88,10 +87,6 @@ impl AppStateRest {
     pub fn new(workspace_roots: Vec<PathBuf>, session_dir: PathBuf, memory_dir: PathBuf) -> Self {
         let settings = Settings::load();
         let app_config = AppConfig::load();
-        let download_dir = memory_dir.parent().unwrap_or_else(|| {
-            tracing::warn!("[state] memory_dir '{}' has no parent, using it for downloads", memory_dir.display());
-            &memory_dir
-        }).join("downloads");
         let worktrees_dir = memory_dir.parent().unwrap_or_else(|| {
             tracing::warn!("[state] memory_dir '{}' has no parent, using it for worktrees", memory_dir.display());
             &memory_dir
@@ -112,7 +107,6 @@ impl AppStateRest {
             session_id,
             session_dir: session_dir.clone(),
             memory_dir,
-            download_dir,
             worktrees_dir,
             turn_events: Arc::new(Mutex::new(VecDeque::new())),
             turn_in_flight: Arc::new(Mutex::new(false)),
@@ -290,7 +284,6 @@ impl AppStateRest {
             workspaces: self.workspace_roots.clone(),
             session_dir: self.session_dir.clone(),
             memory_dir: self.memory_dir.clone(),
-            _download_dir: self.download_dir.clone(),
             worktrees_dir: self.worktrees_dir.clone(),
             dir_cache: self.dir_cache.clone(),
             origin,