chore(release): integrate reviewed changes for Beta 3 build 20260925

Integrate Android CI acceleration, modifier-only dictation chords,
Requesty, and remote-input generation guards over the verified Beta 2
baseline and macOS CI improvements. Fix review findings in signing
configuration caching, APK validation, and modifier arbitration/recording.
Keep Linux egui and its release workflows identical to Beta 2.

Co-authored-by: HKLHaoBin <we3q@qq.com>
Co-authored-by: leolulu <35873316+leolulu@users.noreply.github.com>
Co-authored-by: Thibault Jaigu <thibault.jaigu@gmail.com>
Co-authored-by: Ethan <257484394+EthanYoQ@users.noreply.github.com>

docs/index.md

@@ -24,6 +24,7 @@
 ## 平台与运营
 
 - [macOS CI 与打包耗时](macos-build-performance.md)：基线日志、Rust 编译优化、缓存边界与仅 macOS 验证入口。
+- [Android APK 编译耗时调研与实现](android-build-time-research-1103.md)：ABI 并行、缓存回写和发布验证。
 - [Android APK / 悬浮窗计划](android-mobile-apk-overlay-plan.md)（实施中）
 - [火山引擎 ASR 配置](volcengine-setup.md)
 - [讯飞（iflytek）ASR 配置](xfyun-asr.md)
@@ -40,6 +41,8 @@
 
 ## 本地集成记录
 
+- [2026-09-25 Beta 3 集成](local-builds/2026-09-25-beta3.md)：最新 PR 整合、审查修复、CI 加速与平台范围。
+
 - [2026-09-23 2.0 PR 审查与构建](local-builds/2026-09-23-2.0.md)：PR 取舍、客户端修复及平台验证范围。
 
 - [2026-09-23 模型与云同步界面检查](local-builds/2026-09-23-models-and-sync.md)：运行时平台隔离、Qwen 中英文真实推理和新云同步文档边界。