fix: clear expired auth state before relogin

src/services/icCoderAuthProvider.ts

@@ -176,6 +176,28 @@ export class ICCoderAuthenticationProvider
     }
   }
 
+  /**
+   * Clear local authentication state without window reload.
+   * Used by re-login flow when session is expired.
+   */
+  async clearSessionsForRelogin(): Promise<void> {
+    if (this._sessions.length === 0) {
+      await clearUserInfo();
+      return;
+    }
+
+    const removed = [...this._sessions];
+    this._sessions = [];
+    await this.saveSessions();
+    await clearUserInfo();
+
+    this._onDidChangeSessions.fire({
+      added: [],
+      removed,
+      changed: [],
+    });
+  }
+
   /**
    * 生成会话 ID
    */