fix(complement-race): add missing AI commentary cooldown updates

Fixed critical bug where AI racers would spam speech bubbles every 200ms
instead of respecting the 2-6 second cooldown between comments.

Issue:
The TRIGGER_AI_COMMENTARY action was only updating activeSpeechBubbles
but not updating the AI racer's lastComment timestamp and cooldown value.
This caused getAICommentary() cooldown check to always pass since
lastComment stayed at 0.

Fix:
Added setClientAIRacers() call to update racer.lastComment and
racer.commentCooldown (random 2-6 seconds) when commentary is triggered,
matching the pattern from the original single-player version.

Impact:
- AI commentary now properly throttled (one comment per 2-6 seconds)
- Speech bubbles readable instead of rapidly changing
- Matches original solo game behavior

Provider.tsx:803-814

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

apps/web/src/arcade-games/complement-race/Provider.tsx

@@ -800,6 +800,18 @@ export function ComplementRaceProvider({ children }: { children: ReactNode }) {
             newBubbles.set(action.racerId, action.message)
             return { ...prev, activeSpeechBubbles: newBubbles }
           })
+          // Update racer's lastComment time and cooldown to prevent spam
+          setClientAIRacers((prevRacers) =>
+            prevRacers.map((racer) =>
+              racer.id === action.racerId
+                ? {
+                    ...racer,
+                    lastComment: Date.now(),
+                    commentCooldown: Math.random() * 4000 + 2000, // 2-6 seconds
+                  }
+                : racer
+            )
+          )
           break
         }
         case 'CLEAR_AI_COMMENT': {