fix(#1220): remove default 180s timeout from bash run — no timeout unless explicitly set

hive-bash-mcp/src/protocol.rs

@@ -25,7 +25,11 @@ pub enum TaskStatus {
 pub struct TaskFile {
     pub id: String,
     pub cmd: String,
-    pub timeout_secs: u64,
+    /// Kill timeout in seconds. `None` means no timeout — task runs until
+    /// natural exit. Old task files with a numeric value are still readable
+    /// (serde coerces `u64` → `Some(u64)` is handled by the caller).
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub timeout_secs: Option<u64>,
     pub status: TaskStatus,
     pub created_at: i64,
     #[serde(default, skip_serializing_if = "Option::is_none")]