feat: add listener for markedAsReadChanged events

Implemented event listener pattern in readingProgressController:
- Added onMarkedAsReadChanged() method for subscribers
- Added emitMarkedAsReadChanged() to notify when marked IDs update
- Call emitMarkedAsReadChanged() after loading reactions

In Me.tsx:
- Subscribe to onMarkedAsReadChanged() in new useEffect
- When fired, rebuild reads list with new marked-as-read items
- Include marked-only items (no progress event)

Now when reactions finish loading in background, /me/reads/completed
will update automatically with newly marked articles.

src/components/Me.tsx

@@ -192,6 +192,46 @@ const Me: React.FC<MeProps> = ({
       unsubProgress()
     }
   }, [])
+
+  // Subscribe to marked-as-read changes and rebuild reads list
+  useEffect(() => {
+    const unsubMarkedAsRead = readingProgressController.onMarkedAsReadChanged(() => {
+      // Rebuild reads list including marked-as-read-only items
+      const progressMap = readingProgressController.getProgressMap()
+      const readItems: ReadItem[] = Array.from(progressMap.entries()).map(([id, progress]) => ({
+        id,
+        source: 'reading-progress',
+        type: 'article',
+        readingProgress: progress,
+        markedAsRead: readingProgressController.isMarkedAsRead(id),
+        readingTimestamp: Math.floor(Date.now() / 1000)
+      }))
+
+      // Include items that are only marked-as-read (no progress event yet)
+      const markedIds = readingProgressController.getMarkedAsReadIds()
+      for (const id of markedIds) {
+        if (!readItems.find(i => i.id === id)) {
+          const isArticle = id.startsWith('naddr1')
+          readItems.push({
+            id,
+            source: 'marked-as-read',
+            type: isArticle ? 'article' : 'external',
+            url: isArticle ? undefined : id,
+            markedAsRead: true,
+            readingTimestamp: Math.floor(Date.now() / 1000)
+          })
+        }
+      }
+
+      const readsMap = new Map(readItems.map(item => [item.id, item]))
+      setReadsMap(readsMap)
+      setReads(readItems)
+    })
+    
+    return () => {
+      unsubMarkedAsRead()
+    }
+  }, [])
   
   // Load reading progress data for writings tab
   useEffect(() => {