fix(hooks): remove Stop hook that caused 30s timeouts (gt-quoj)

The Stop hook with `gt costs record` was causing 30-second timeouts
on every session stop due to beads socket connection issues. Since
cost tracking is disabled anyway (Claude Code doesn't expose session
costs), this hook provided no value.

Changes:
- Remove Stop hook from settings-autonomous.json and settings-interactive.json
- Remove Stop hook validation from claude_settings_check.go
- Update tests to not expect Stop hook

The cost tracking infrastructure remains in costs.go for future use
when Claude Code exposes session costs via API or environment variable.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/doctor/claude_settings_check.go

@@ -335,8 +335,8 @@ func (c *ClaudeSettingsCheck) checkSettings(path, _ string) []string {
 	// All templates should have:
 	// 1. enabledPlugins
 	// 2. PATH export in hooks
-	// 3. Stop hook with gt costs record (for autonomous)
-	// 4. gt nudge deacon session-started in SessionStart
+	// 3. gt nudge deacon session-started in SessionStart
+	// Note: Stop hook was removed (gt-quoj) - cost tracking is disabled
 
 	// Check enabledPlugins
 	if _, ok := actual["enabledPlugins"]; !ok {
@@ -359,10 +359,9 @@ func (c *ClaudeSettingsCheck) checkSettings(path, _ string) []string {
 		missing = append(missing, "deacon nudge")
 	}
 
-	// Check Stop hook exists with gt costs record (for all roles)
-	if !c.hookHasPattern(hooks, "Stop", "gt costs record") {
-		missing = append(missing, "Stop hook")
-	}
+	// Note: Stop hook with gt costs record was removed in gt-quoj.
+	// Cost tracking is disabled - Claude Code doesn't expose session costs.
+	// The Stop hook was causing 30s timeouts on session stop with no benefit.
 
 	return missing
 }