feat: Improve seek logging and increase log buffer to 200 entries

- Log [Seek] Filtered when delta < 3s threshold (warn level) showing exact delta
- Log [Seek] Relayed when a seek passes all filters (info level) showing target time + delta
- Programmatic seeks (force sync, peer commands) remain silent in logs
- Increase log ring buffer from 50 -> 200 entries in all three enforcement points

extension/background.js

@@ -36,7 +36,7 @@ function ensureState() {
                 if (data.currentTabTitle !== undefined) currentTabTitle = data.currentTabTitle;
                 // Merge data from storage with any early-arriving state
                 // New entries (added during boot) must stay at the top (index 0)
-                if (data.logs) logs = [...logs, ...data.logs].slice(0, 50);
+                if (data.logs) logs = [...logs, ...data.logs].slice(0, 200);
                 if (data.history) history = [...history, ...data.history].slice(0, 20);
                 if (data.currentRoom) currentRoom = data.currentRoom;
                 if (data.lastActionState) lastActionState = data.lastActionState;
@@ -82,7 +82,7 @@ function ensureState() {
                 
                 // Process any early logs/history that weren't captured in the spread
                 if (pendingLogs.length > 0) {
-                    logs = [...pendingLogs, ...logs].slice(0, 50);
+                    logs = [...pendingLogs, ...logs].slice(0, 200);
                     chrome.storage.session.set({ logs });
                     pendingLogs = [];
                 }
@@ -169,7 +169,7 @@ function addLog(message, type = 'info') {
         pendingLogs.unshift(log);
     } else {
         logs.unshift(log);
-        if (logs.length > 50) logs.pop();
+        if (logs.length > 200) logs.pop();
         chrome.storage.session.set({ logs });
     }
     chrome.runtime.sendMessage({ type: 'LOG_UPDATE', log }).catch(() => {});

extension/content.js

@@ -414,12 +414,17 @@
         if (expectedEvents.has('seek')) {
             expectedEvents.delete('seek');
             lastReportedSeekTime = current; // Update baseline so next user seek is relative to here
+            // No log — this is routine programmatic behavior (Force Sync, lobby, peer command)
             return;
         }
 
+        const delta = lastReportedSeekTime !== null ? Math.abs(current - lastReportedSeekTime) : null;
+        const deltaStr = delta !== null ? `Δ${delta.toFixed(2)}s` : 'Δ?';
+
         // Step 2: Delta check — skip micro-seeks (buffering, chapter markers, etc.)
-        if (lastReportedSeekTime !== null && Math.abs(current - lastReportedSeekTime) < MIN_SEEK_DELTA) {
+        if (lastReportedSeekTime !== null && delta < MIN_SEEK_DELTA) {
-            return; // Too small — likely an internal player seek, not user-initiated
+            reportLog(`[Seek] Filtered (${deltaStr} < ${MIN_SEEK_DELTA}s threshold) @ ${current.toFixed(2)}s — not relayed`, 'warn');
+            return;
         }
 
         // Step 3: Debounce rapid consecutive seeks (e.g. scrubbing)
@@ -430,11 +435,15 @@
             const v = findVideo();
             if (!v) return;
             const settled = v.currentTime;
+            const finalDelta = lastReportedSeekTime !== null ? Math.abs(settled - lastReportedSeekTime) : null;
+            const finalDeltaStr = finalDelta !== null ? `Δ${finalDelta.toFixed(2)}s` : 'Δ?';
             lastReportedSeekTime = settled;
+            reportLog(`[Seek] Relayed @ ${settled.toFixed(2)}s (${finalDeltaStr})`, 'info');
             reportEvent(EVENTS.SEEK);
         }, 800);
     };
 
+
     let lastVideoSrc = null;
 
     // Episode detection handler for loadeddata event