whitelist command prefix integration in core and tui (#7033)

this PR enables TUI to approve commands and add their prefixes to an
allowlist:
<img width="708" height="605" alt="Screenshot 2025-11-21 at 4 18 07 PM"
src="https://github.com/user-attachments/assets/56a19893-4553-4770-a881-becf79eeda32"
/>

note: we only show the option to whitelist the command when 
1) command is not multi-part (e.g `git add -A && git commit -m 'hello
world'`)
2) command is not already matched by an existing rule

codex-rs/otel/src/otel_event_manager.rs

@@ -352,7 +352,7 @@ impl OtelEventManager {
         &self,
         tool_name: &str,
         call_id: &str,
-        decision: ReviewDecision,
+        decision: &ReviewDecision,
         source: ToolDecisionSource,
     ) {
         tracing::event!(
@@ -369,7 +369,7 @@ impl OtelEventManager {
             slug = %self.metadata.slug,
             tool_name = %tool_name,
             call_id = %call_id,
-            decision = %decision.to_string().to_lowercase(),
+            decision = %decision.clone().to_string().to_lowercase(),
             source = %source.to_string(),
         );
     }