style: format seluruh workspace dengan cargo fmt

Menyeragamkan format kode sesuai rustfmt (126 file). Sebelumnya
lefthook pre-commit 'cargo fmt --check' akan gagal pada commit apa pun.

apps/domain/src/agent/mod.rs

@@ -7,8 +7,8 @@ use std::path::PathBuf;
 use crate::core::{ChatMessage, ToolCallResult, UsageStats};
 
 pub mod defaults;
-pub mod prompt;
 pub mod progress;
+pub mod prompt;
 
 /// Which kind of caller (main agent vs. subagent vs. reviewer) is
 /// invoking a tool, used to scope permissions and tag log/output paths.