fix(hooks): fix agent-usage-reminder case-sensitivity bug in tool name matching

- Change TARGET_TOOLS and AGENT_TOOLS to Set<string> for O(1) lookup
- Normalize tool names to lowercase for case-insensitive comparison
- Remove unnecessary parentSessionID guard that blocked main session triggers
- Fixes issue where Glob/Grep tool calls weren't showing agent usage reminder

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/hooks/agent-usage-reminder/constants.ts

@@ -7,23 +7,24 @@ export const AGENT_USAGE_REMINDER_STORAGE = join(
   "agent-usage-reminder",
 );
 
-export const TARGET_TOOLS = [
-  "Grep",
+// All tool names normalized to lowercase for case-insensitive matching
+export const TARGET_TOOLS = new Set([
+  "grep",
   "safe_grep",
-  "Glob",
+  "glob",
   "safe_glob",
-  "WebFetch",
+  "webfetch",
   "context7_resolve-library-id",
   "context7_get-library-docs",
   "websearch_exa_web_search_exa",
-  "grep_app_searchGitHub",
-] as const;
+  "grep_app_searchgithub",
+]);
 
-export const AGENT_TOOLS = [
-  "Task",
+export const AGENT_TOOLS = new Set([
+  "task",
   "call_omo_agent",
   "background_task",
-] as const;
+]);
 
 export const REMINDER_MESSAGE = `
 [Agent Usage Reminder]