Migrate the knowledge fetch onto runFetchAsync

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/session/roles.go

@@ -181,37 +181,31 @@ func (c *Controller) startKnowledgeFetchLocked() {
 	c.knowledgeStatus = knowledgePending
 	src := c.knowledgeSrc
 	path := c.knowledgePath
-	go func() {
-		ctx, cancel := context.WithTimeout(context.Background(), knowledgeTimeout)
-		defer cancel()
-		prof, err := src.Load(ctx, path)
-
-		c.mu.Lock()
-		if gen != c.knowledgeGen || c.runtimeState != domain.RuntimePlanning {
-			c.mu.Unlock()
-			return // stale or left planning: discard
-		}
-		if err != nil {
-			c.knowledgeStatus = knowledgeError
-			c.knowledgeText = ""
-			c.knowledgeChars = 0
-			if prof.Path != "" {
+	var prof knowledge.Profile
+	var err error
+	c.runFetchAsync(knowledgeTimeout,
+		func(ctx context.Context) { prof, err = src.Load(ctx, path) },
+		func() bool { return gen != c.knowledgeGen || c.runtimeState != domain.RuntimePlanning },
+		func() {
+			if err != nil {
+				c.knowledgeStatus = knowledgeError
+				c.knowledgeText = ""
+				c.knowledgeChars = 0
+				if prof.Path != "" {
+					c.knowledgePath = prof.Path
+				}
+			} else if prof.Text == "" {
+				c.knowledgeStatus = knowledgeAbsent
+				c.knowledgeText = ""
+				c.knowledgeChars = 0
+				c.knowledgePath = prof.Path
+			} else {
+				c.knowledgeStatus = knowledgeReady
+				c.knowledgeText = prof.Text
+				c.knowledgeChars = len(prof.Text)
 				c.knowledgePath = prof.Path
 			}
-		} else if prof.Text == "" {
-			c.knowledgeStatus = knowledgeAbsent
-			c.knowledgeText = ""
-			c.knowledgeChars = 0
-			c.knowledgePath = prof.Path
-		} else {
-			c.knowledgeStatus = knowledgeReady
-			c.knowledgeText = prof.Text
-			c.knowledgeChars = len(prof.Text)
-			c.knowledgePath = prof.Path
-		}
-		c.mu.Unlock()
-		c.notify()
-	}()
+		})
 }
 
 // SetReviewer injects the AI reviewer. A nil reviewer keeps reflection idle and