refactor(keyword-detector): decouple from claude-code-hooks via ContextCollector pipeline

- keyword-detector now registers keywords to ContextCollector
- context-injector consumes and injects via chat.message hook
- Removed keyword detection logic from claude-code-hooks
- Hook order: keyword-detector → context-injector → claude-code-hooks
- ultrawork now works even when claude-code-hooks is disabled

src/index.ts

@@ -165,7 +165,7 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
       })
     : null;
   const keywordDetector = isHookEnabled("keyword-detector")
-    ? createKeywordDetectorHook(ctx)
+    ? createKeywordDetectorHook(ctx, contextCollector)
     : null;
   const contextInjector = createContextInjectorHook(contextCollector);
   const contextInjectorMessagesTransform =
@@ -313,9 +313,9 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
     },
 
     "chat.message": async (input, output) => {
-      await claudeCodeHooks["chat.message"]?.(input, output);
       await keywordDetector?.["chat.message"]?.(input, output);
       await contextInjector["chat.message"]?.(input, output);
+      await claudeCodeHooks["chat.message"]?.(input, output);
       await autoSlashCommand?.["chat.message"]?.(input, output);
       await startWork?.["chat.message"]?.(input, output);