fix: resolve compilation error and warnings in Rust backend (#95)

* fix: resolve compilation error and warnings in Rust backend

- Fix syntax error in directive.rs phase_replanning (bad merge created
  duplicate code blocks with broken `.await {` syntax)
- Remove unused imports: WorktreeError, DaemonReauthStatus, ratatui::prelude
- Prefix unused variables with underscore: claude_command, content, owner_id
- Suppress unused_assignments warning on final_exit_code
- Add #[allow(unused_imports)] for cfg(unix) CommandExt imports

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* WIP: heartbeat checkpoint

* fix: suppress remaining compiler warnings for clean build

- Add #[allow(dead_code)] for unused but intentionally kept functions
- Remove useless self-assignments in listen handler
- Fixes: truncate_string, checkout_commit, handle_get_worktree_diff,
  default_max_retries, STREAM_CHUNK_MS, listen(), MessageResponse.role

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

4 files changed, 7 insertions, 3 deletions

diff --git a/makima/src/daemon/process/claude.rs b/makima/src/daemon/process/claude.rs
index 57c8f77..aa18fab 100644
--- a/makima/src/daemon/process/claude.rs
+++ b/makima/src/daemon/process/claude.rs
@@ -577,6 +577,7 @@ impl ProcessManager {
         // On Unix, create a new process group so we can kill all child processes
         #[cfg(unix)]
         {
+            #[allow(unused_imports)]
             use std::os::unix::process::CommandExt;
             cmd.process_group(0);
         }
@@ -762,6 +763,7 @@ impl ProcessManager {
         // On Unix, create a new process group so we can kill all child processes
         #[cfg(unix)]
         {
+            #[allow(unused_imports)]
             use std::os::unix::process::CommandExt;
             cmd.process_group(0);
         }
diff --git a/makima/src/daemon/storage/patch.rs b/makima/src/daemon/storage/patch.rs
index 05c45a3..c9bc6f5 100644
--- a/makima/src/daemon/storage/patch.rs
+++ b/makima/src/daemon/storage/patch.rs
@@ -387,6 +387,7 @@ fn parse_diff_stat(stat_output: &str) -> (usize, usize) {
 }
 
 /// Checkout a specific commit in the worktree.
+#[allow(dead_code)]
 pub async fn checkout_commit(worktree_path: &Path, sha: &str) -> Result<(), PatchError> {
     let output = Command::new("git")
         .current_dir(worktree_path)
diff --git a/makima/src/daemon/task/manager.rs b/makima/src/daemon/task/manager.rs
index ca97453..f483218 100644
--- a/makima/src/daemon/task/manager.rs
+++ b/makima/src/daemon/task/manager.rs
@@ -20,7 +20,7 @@ use crate::daemon::error::{DaemonError, TaskError, TaskResult};
 use crate::daemon::process::{ClaudeInputMessage, ProcessManager};
 use crate::daemon::storage;
 use crate::daemon::temp::TempManager;
-use crate::daemon::worktree::{is_new_repo_request, ConflictResolution, WorktreeError, WorktreeInfo, WorktreeManager};
+use crate::daemon::worktree::{is_new_repo_request, ConflictResolution, WorktreeInfo, WorktreeManager};
 use crate::daemon::db::local::LocalDb;
 use crate::daemon::ws::{BranchInfo, DaemonCommand, DaemonMessage};
 
@@ -3706,6 +3706,7 @@ impl TaskManager {
     }
 
     /// Handle GetWorktreeDiff command - get git diff for a task's worktree.
+    #[allow(dead_code)]
     async fn handle_get_worktree_diff(
         &self,
         task_id: Uuid,
@@ -5622,7 +5623,7 @@ impl TaskManagerInner {
         let ws_tx = self.ws_tx.clone();
 
         // For auth error detection
-        let claude_command = self.process_manager.claude_command().to_string();
+        let _claude_command = self.process_manager.claude_command().to_string();
         let daemon_hostname = hostname::get().ok().and_then(|h| h.into_string().ok());
         let mut auth_error_handled = false;
 
@@ -5630,6 +5631,7 @@ impl TaskManagerInner {
         let mut accumulated_output = String::new();
         let mut circuit_breaker = CircuitBreaker::new();
         let mut iteration_count = 0u32;
+        #[allow(unused_assignments)]
         let mut final_exit_code: i64 = -1; // Track the final exit code across iterations
 
         // Autonomous loop: we may run multiple iterations
diff --git a/makima/src/daemon/tui/mod.rs b/makima/src/daemon/tui/mod.rs
index e52b12a..46652ec 100644
--- a/makima/src/daemon/tui/mod.rs
+++ b/makima/src/daemon/tui/mod.rs
@@ -26,7 +26,6 @@ use crossterm::{
     execute,
     terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
 };
-use ratatui::prelude::*;
 use ratatui::backend::CrosstermBackend;
 
 pub type Terminal = ratatui::Terminal<CrosstermBackend<io::Stdout>>;