fix: stabilize LivePlayer for normal HLS live

Disable lowLatencyMode, widen fragment retries, extend startup 404
window to 30s, and recover media fatals once before bubbling.

src/components/LivePlayer.vue

@@ -44,8 +44,8 @@
 <script setup>
 import { computed, onBeforeUnmount, ref, watch } from 'vue'
 
-const STARTUP_RETRY_DELAYS_MS = [500, 1000, 2000, 4000]
-const STARTUP_WINDOW_MS = 15_000
+const STARTUP_RETRY_DELAYS_MS = [500, 1000, 2000, 4000, 6000, 8000]
+const STARTUP_WINDOW_MS = 30_000
 
 const props = defineProps({
   playUrl: { type: String, default: '' },
@@ -321,10 +321,13 @@ async function attachPlayer(url, { seq: existingSeq } = {}) {
     // 关闭内置长重试，改由启动窗口退避控制 404 等待
     hls = new Hls({
       enableWorker: true,
-      lowLatencyMode: true,
-      manifestLoadingMaxRetry: 0,
-      levelLoadingMaxRetry: 0,
-      fragLoadingMaxRetry: 1,
+      lowLatencyMode: false,
+      manifestLoadingMaxRetry: 2,
+      manifestLoadingRetryDelay: 1000,
+      levelLoadingMaxRetry: 2,
+      levelLoadingRetryDelay: 1000,
+      fragLoadingMaxRetry: 4,
+      fragLoadingRetryDelay: 1000,
     })
     hls.on(Hls.Events.ERROR, (_event, data) => {
       if (seq !== attachSeq) return
@@ -367,6 +370,16 @@ async function attachPlayer(url, { seq: existingSeq } = {}) {
         return
       }
 
+      if (data.type === Hls.ErrorTypes.MEDIA_ERROR) {
+        try {
+          console.warn('[live-player] hls media fatal, recover once', data)
+          hls.recoverMediaError()
+          return
+        } catch (recoverErr) {
+          console.warn('[live-player] hls recover failed', recoverErr)
+        }
+      }
+
       console.warn('[live-player] hls fatal', data)
       emitFatal(buildPlayError({
         message: detail || 'hls fatal',