fix(core,web): retry transport and quota LLM errors, disable dead sessions on auth failure (#82)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/web/src/lib/strings.ts

@@ -626,10 +626,18 @@ Penguin 视觉风格（见 web-design 技能），深色/浅色主题（<html da
     subagent: "子会话",
     subagentRunning: "运行中",
     aborted: (reason?: string) => `[已中断]${reason ? `：${reason}` : ""}`,
+    /** Auth-dead notice (request_end status "auth"): action-only copy — updating the key on the Models page auto-unlocks this Session. */
+    modelAuthDead: "模型 API 认证失败：请在模型配置页更新该模型的 API key，或新建会话。",
+    modelAuthDeadOpenModels: "打开模型配置",
+    modelAuthDeadRetry: "重试",
+    modelAuthDeadCta: "新建会话",
+    modelAuthDeadPlaceholder: "模型认证失败，请先更新 API key",
+    /** Reconnect hint line; `secondsLeft` (waiting state only) switches to the live-countdown wording. */
     reconnect: (
       status: "timeout" | "malformed",
       state: "waiting" | "retried" | "gaveUp",
       attempt: number,
+      secondsLeft?: number,
     ) => {
       const cause = status === "timeout" ? "连接超时或网络中断" : "响应不完整或无法解析";
       const action =
@@ -637,9 +645,15 @@ Penguin 视觉风格（见 web-design 技能），深色/浅色主题（<html da
           ? "已停止重试"
           : state === "retried"
             ? `已发起第 ${attempt} 次重试`
-            : `正在发起第 ${attempt} 次重试…`;
+            : secondsLeft !== undefined
+              ? `第 ${attempt} 次重试，${secondsLeft} 秒后发起…`
+              : `正在发起第 ${attempt} 次重试…`;
       return `[重试] ${cause}，${action}`;
     },
+    /** "Retry now" on the reconnect countdown (skips the remaining backoff wait). */
+    reconnectRetryNow: "立即重试",
+    /** "Give up" on the reconnect countdown (the ordinary session abort). */
+    reconnectGiveUp: "放弃",
     imageAlt: "用户上传的图片",
     toolImageAlt: "工具输出的图片",
     imagesAsPathHint: