improve watch history reliability

- Reduced view threshold from 12s to 5s in watchHistoryTelemetry.js
- Enabled immediate watch history republishing (0ms delay) for the first attempt in watchHistory.js
- Updated watchHistoryService.js to recursively schedule queue flushes if items accumulate during an inflight sync

js/nostr/watchHistory.js

@@ -1101,13 +1101,25 @@ class WatchHistoryManager {
     if (attempt > WATCH_HISTORY_REPUBLISH_MAX_ATTEMPTS) {
       return;
     }
-    const exponentialDelay = WATCH_HISTORY_REPUBLISH_BASE_DELAY_MS * Math.pow(2, attempt);
-    const cappedDelay = Math.min(exponentialDelay, WATCH_HISTORY_REPUBLISH_MAX_DELAY_MS);
-    const jitter = Math.random() * cappedDelay * WATCH_HISTORY_REPUBLISH_JITTER;
-    const delay = Math.max(
-      WATCH_HISTORY_REPUBLISH_BASE_DELAY_MS,
-      Math.floor(cappedDelay + jitter),
-    );
+
+    let delay = 0;
+    if (attempt === 0) {
+      delay = 10;
+    } else {
+      const exponentialDelay =
+        WATCH_HISTORY_REPUBLISH_BASE_DELAY_MS * Math.pow(2, attempt);
+      const cappedDelay = Math.min(
+        exponentialDelay,
+        WATCH_HISTORY_REPUBLISH_MAX_DELAY_MS,
+      );
+      const jitter =
+        Math.random() * cappedDelay * WATCH_HISTORY_REPUBLISH_JITTER;
+      delay = Math.max(
+        WATCH_HISTORY_REPUBLISH_BASE_DELAY_MS,
+        Math.floor(cappedDelay + jitter),
+      );
+    }
+
     if (onSchedule) {
       try {
         onSchedule({ taskId: key, attempt: attempt + 1, delay });

js/services/watchHistoryTelemetry.js

@@ -5,7 +5,7 @@ import {
   ingestLocalViewEvent as defaultIngestLocalViewEvent,
 } from "../viewCounter.js";
 
-const DEFAULT_VIEW_THRESHOLD_SECONDS = 12;
+const DEFAULT_VIEW_THRESHOLD_SECONDS = 5;
 
 function normalizeString(value) {
   return typeof value === "string" ? value.trim() : "";

js/watchHistoryService.js

@@ -615,12 +615,15 @@ function scheduleRepublishForQueue(actorKey) {
           actorKey,
           queue,
           keysToClear,
-          snapshotStartTime
+          snapshotStartTime,
         );
         await updateFingerprintCache(
           actorKey,
           publishResult.items || latestItems,
         );
+        if (queue.items.size > 0) {
+          scheduleRepublishForQueue(actorKey);
+        }
       } else if (!publishResult?.retryable) {
         // If not retryable, we clear the scheduled flag to allow new attempts later
         queue.republishScheduled = false;