fix autoplay gate to hold pause until subtitle prime and tokenization re

- use pluginRuntimeConfig.autoStart (not effectivePluginRuntimeConfig) so pause-until-ready is preserved when attaching to a background app
- await subtitle priming before signaling autoplay readiness
- move sub-auto/sid defaults to start-file so they are not overwritten after track load

src/main/runtime/app-control-server.test.ts

@@ -7,11 +7,15 @@ import { sendAppControlCommand } from '../../shared/app-control-client';
 import { startAppControlServer } from './app-control-server';
 
 async function waitForSocketPath(socketPath: string): Promise<void> {
-  const deadline = Date.now() + 1000;
+  const timeoutMs = 1000;
+  const deadline = Date.now() + timeoutMs;
   while (Date.now() < deadline) {
     if (fs.existsSync(socketPath)) return;
     await new Promise<void>((resolve) => setTimeout(resolve, 10));
   }
+  throw new Error(
+    `Timed out waiting for control socket ${socketPath} after ${timeoutMs}ms`,
+  );
 }
 
 test('app control server dispatches argv requests and replies ok', async () => {

src/main/runtime/autoplay-tokenization-warm-release.test.ts

@@ -2,6 +2,10 @@ import assert from 'node:assert/strict';
 import test from 'node:test';
 import { createAutoplayTokenizationWarmRelease } from './autoplay-tokenization-warm-release';
 
+function flushMicrotasks(): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, 0));
+}
+
 test('autoplay tokenization warm release signals immediately when warmups are ready', () => {
   const calls: string[] = [];
   const release = createAutoplayTokenizationWarmRelease({
@@ -45,14 +49,17 @@ test('autoplay tokenization warm release primes subtitles before waiting for war
 
   resolveWarmup();
   await warmup;
-  await Promise.resolve();
+  await flushMicrotasks();
 
   assert.deepEqual(calls, ['prime', 'warmup', 'signal']);
 });
 
-test('autoplay tokenization warm release does not await subtitle priming before signaling ready media', async () => {
+test('autoplay tokenization warm release waits for subtitle priming before signaling ready media', async () => {
   const calls: string[] = [];
-  const never = new Promise<void>(() => {});
+  let resolvePrime!: () => void;
+  const prime = new Promise<void>((resolve) => {
+    resolvePrime = resolve;
+  });
   const release = createAutoplayTokenizationWarmRelease({
     isTokenizationWarmupReady: () => true,
     startTokenizationWarmups: async () => {
@@ -61,7 +68,7 @@ test('autoplay tokenization warm release does not await subtitle priming before
     getCurrentMediaPath: () => '/tmp/video.mkv',
     primeCurrentSubtitle: () => {
       calls.push('prime');
-      return never;
+      return prime;
     },
     signalAutoplayReady: () => calls.push('signal'),
     warn: () => {},
@@ -70,6 +77,12 @@ test('autoplay tokenization warm release does not await subtitle priming before
   release('/tmp/video.mkv');
   await Promise.resolve();
 
+  assert.deepEqual(calls, ['prime']);
+
+  resolvePrime();
+  await prime;
+  await Promise.resolve();
+
   assert.deepEqual(calls, ['prime', 'signal']);
 });
 

src/main/runtime/autoplay-tokenization-warm-release.ts

@@ -22,24 +22,41 @@ export function createAutoplayTokenizationWarmRelease(deps: {
     deps.signalAutoplayReady();
   };
 
+  const primeSubtitleForRelease = (mediaPath: string): Promise<void> | null => {
+    if (!deps.primeCurrentSubtitle) {
+      return null;
+    }
+    try {
+      return Promise.resolve(deps.primeCurrentSubtitle(mediaPath)).catch((error) => {
+        deps.warn('Startup subtitle priming failed before autoplay readiness release:', error);
+      });
+    } catch (error) {
+      deps.warn('Startup subtitle priming failed before autoplay readiness release:', error);
+      return null;
+    }
+  };
+
   return (mediaPath) => {
     const normalizedPath = normalizeMediaPath(mediaPath);
     if (!normalizedPath) {
       return;
     }
-    try {
-      void Promise.resolve(deps.primeCurrentSubtitle?.(normalizedPath)).catch((error) => {
-        deps.warn('Startup subtitle priming failed before autoplay readiness release:', error);
-      });
-    } catch (error) {
-      deps.warn('Startup subtitle priming failed before autoplay readiness release:', error);
-    }
+    const primePromise = primeSubtitleForRelease(normalizedPath);
     if (deps.isTokenizationWarmupReady()) {
-      signalIfCurrent(normalizedPath);
+      if (!primePromise) {
+        signalIfCurrent(normalizedPath);
+        return;
+      }
+      void primePromise.then(() => {
+        signalIfCurrent(normalizedPath);
+      });
       return;
     }
-    void deps
-      .startTokenizationWarmups()
+    const warmupPromise = deps.startTokenizationWarmups();
+    const readinessPromise = primePromise
+      ? Promise.all([primePromise, warmupPromise]).then(() => {})
+      : warmupPromise;
+    void readinessPromise
       .then(() => {
         signalIfCurrent(normalizedPath);
       })