Complete provider waits and lifecycle visibility

Release aborted Real-Debrid, AllDebrid, and BestDebrid web callers even when underlying requests ignore cancellation while retaining terminal rejection observers. Publish provider cooldown deadlines and emit a fresh idle snapshot at the earliest expiry. Abort and visibly drain post-processing before dispatching one pending restart. Surface lifecycle phase, reason, retry countdown, and remaining work in the download controls. Add focused regressions for provider abort races, cooldown expiry, post-processing drain, pending start visibility, and the updated rapid stop contract.

src/main/all-debrid-web.ts

@@ -42,7 +42,7 @@ function throwIfAborted(signal?: AbortSignal): void {
   }
 }
 
-async function sleepWithSignal(ms: number, signal?: AbortSignal): Promise<void> {
+async function sleepWithSignal(ms: number, signal?: AbortSignal): Promise<void> {
   if (!signal) {
     await sleep(ms);
     return;
@@ -68,8 +68,44 @@ async function sleepWithSignal(ms: number, signal?: AbortSignal): Promise<void>
     };
 
     signal.addEventListener("abort", onAbort, { once: true });
-  });
-}
+  });
+}
+
+async function raceWithAbort<T>(promise: Promise<T>, signal?: AbortSignal): Promise<T> {
+  if (!signal) {
+    return promise;
+  }
+  if (signal.aborted) {
+    throw abortError();
+  }
+  return new Promise<T>((resolve, reject) => {
+    let settled = false;
+    const onAbort = (): void => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      signal.removeEventListener("abort", onAbort);
+      reject(abortError());
+    };
+    signal.addEventListener("abort", onAbort, { once: true });
+    promise.then((value) => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      signal.removeEventListener("abort", onAbort);
+      resolve(value);
+    }, (error) => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      signal.removeEventListener("abort", onAbort);
+      reject(error);
+    });
+  });
+}
 
 function asRecord(value: unknown): Record<string, unknown> | null {
   if (!value || typeof value !== "object" || Array.isArray(value)) {
@@ -280,10 +316,10 @@ export class AllDebridWebFallback {
       }
       return job();
     };
-    const run = this.queue.then(guardedJob, guardedJob);
-    this.queue = run.then(() => undefined, () => undefined);
-    return run;
-  }
+    const run = this.queue.then(guardedJob, guardedJob);
+    this.queue = run.then(() => undefined, () => undefined);
+    return raceWithAbort(run, signal);
+  }
 
   private async ensureLoginWindow(): Promise<BrowserWindow> {
     const partition = this.getPartition();