Refactor: Behebung Force-Sync ACK-Zaehler-Inflation, SHA-256 Hashing, Room-ID-Desinfizierung, Reduzierung MIN_SEEK_DELTA auf 2s und seekDebounce auf 300ms

extension/background.js

@@ -788,6 +788,8 @@ function handleServerEvent(event, data) {
                     }
 
                     if (isForceSyncInitiator) {
+                        forceSyncAcks.delete(data.peerId);
+                        chrome.storage.session.set({ forceSyncAcks: Array.from(forceSyncAcks) });
                         expectedAcksCount = Math.max(1, currentRoom.peers ? currentRoom.peers.length : 1);
                         chrome.storage.session.set({ expectedAcksCount });
                         if (forceSyncAcks.size >= expectedAcksCount) {
@@ -1225,7 +1227,8 @@ async function handleAsyncMessage(message, sender, sendResponse) {
         emit(EVENTS.GET_ROOMS, {});
         sendResponse({ status: 'ok' });
     } else if (message.type === 'WEB_JOIN_REQUEST') {
-        const { roomId, password, useCustomServer, serverUrl } = message;
+        const { roomId: rawRoomId, password, useCustomServer, serverUrl } = message;
+        const roomId = typeof rawRoomId === 'string' ? rawRoomId.replace(/[^a-zA-Z0-9\-]/g, '') : '';
         chrome.storage.sync.set({ 
             roomId, 
             password,

extension/content.js

@@ -52,7 +52,7 @@
     // --- Seek Relay Filtering ---
     // Minimum seek delta (seconds) to report. Prevents HLS/DASH buffering micro-seeks
     // from being relayed to peers as user-initiated seeks.
-    const MIN_SEEK_DELTA = 3.0;
+    const MIN_SEEK_DELTA = 2.0;
     let lastReportedSeekTime = null;  // last currentTime we relayed as a SEEK
     let seekDebounceTimer = null;     // debounce timer for rapid seek events
 
@@ -582,7 +582,7 @@
         }
 
         // Step 4: Debounce rapid consecutive seeks (e.g. scrubbing)
-        // — wait 800ms for the user to settle before relaying
+        // — wait 300ms for the user to settle before relaying
         if (seekDebounceTimer) clearTimeout(seekDebounceTimer);
         seekDebounceTimer = setTimeout(() => {
             seekDebounceTimer = null;
@@ -594,7 +594,7 @@
             lastReportedSeekTime = settled;
             reportLog(`[Seek] Relayed @ ${settled.toFixed(2)}s (${finalDeltaStr})`, 'info');
             reportEvent(EVENTS.SEEK);
-        }, 800);
+        }, 300);
     };
 
 

extension/popup.js

@@ -942,6 +942,10 @@ function showError(msg) {
 }
 
 // --- Action Handlers ---
+elements.roomId.addEventListener('input', () => {
+    elements.roomId.value = elements.roomId.value.replace(/[^a-zA-Z0-9\-]/g, '');
+});
+
 elements.joinBtn.addEventListener('click', async () => {
     if (elements.joinBtn.disabled) return;
     const roomIdInput = elements.roomId.value.trim();