fix: improve Windows compatibility and fix event listener issues (#1102)

Replace platform-specific 'which'/'where' commands with cross-platform Bun.which() API to fix Windows compatibility issues and simplify code.

Fixes:
- #1027: Comment-checker binary crashes on Windows (missing 'check' subcommand)
- #1036: Session-notification listens to non-existent events
- #1033: Infinite loop in session notifications
- #599: Doctor incorrectly reports OpenCode as not installed on Windows
- #1005: PowerShell path detection corruption on Windows

Changes:
- Use Bun.which() instead of spawning 'which'/'where' commands
- Add 'check' subcommand to comment-checker invocation
- Remove non-existent event listeners (session.updated, message.created)
- Prevent notification commands from resetting their own state
- Fix edge case: clear notifiedSessions if activity occurs during notification

All changes are cross-platform compatible and tested on Windows/Linux/macOS.

src/hooks/session-notification.ts

@@ -200,7 +200,9 @@ export function createSessionNotification(
 
   function markSessionActivity(sessionID: string) {
     cancelPendingNotification(sessionID)
-    notifiedSessions.delete(sessionID)
+    if (!executingNotifications.has(sessionID)) {
+      notifiedSessions.delete(sessionID)
+    }
   }
 
   async function executeNotification(sessionID: string, version: number) {
@@ -254,6 +256,11 @@ export function createSessionNotification(
     } finally {
       executingNotifications.delete(sessionID)
       pendingTimers.delete(sessionID)
+      // Clear notified state if there was activity during notification
+      if (sessionActivitySinceIdle.has(sessionID)) {
+        notifiedSessions.delete(sessionID)
+        sessionActivitySinceIdle.delete(sessionID)
+      }
     }
   }
 
@@ -262,7 +269,7 @@ export function createSessionNotification(
 
     const props = event.properties as Record<string, unknown> | undefined
 
-    if (event.type === "session.updated" || event.type === "session.created") {
+    if (event.type === "session.created") {
       const info = props?.info as Record<string, unknown> | undefined
       const sessionID = info?.id as string | undefined
       if (sessionID) {
@@ -299,7 +306,7 @@ export function createSessionNotification(
       return
     }
 
-    if (event.type === "message.updated" || event.type === "message.created") {
+    if (event.type === "message.updated") {
       const info = props?.info as Record<string, unknown> | undefined
       const sessionID = info?.sessionID as string | undefined
       if (sessionID) {