fix: codex idle detection missing "› Use /skills" and status bar patterns

Codex idle prompt shows "› Use /skills to list available skills" and a
status bar like "gpt-5.4 medium · 59% left", but CODEX_IDLE_PATTERNS
only matched bare ">" or "›" on a line by itself. This caused P2P hops
to stall waiting for codex to become idle when it already was.

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

Author: IM.codes

src/agent/detect.ts

@@ -53,6 +53,8 @@ const CC_PERMISSION_PATTERNS = [
 const CODEX_IDLE_PATTERNS = [
   /^\s*>\s*$/m,                        // line that is ONLY ">" — Codex prompt
   /^\s*›\s*$/m,                        // line that is ONLY "›" — alternate prompt
+  /^\s*›\s+Use\s+\/skills/m,          // "› Use /skills to list..." — idle prompt with hint
+  /gpt-[\d.]+ \w+ · \d+% left/,       // "gpt-5.4 medium · 59% left" — status bar when idle
 ];
 
 const CODEX_SPINNER_CHARS = ['⠋', '⠙', '⠹', '⠸', '⠼', '⠴', '⠦', '⠧'];