feat(app): add crash visibility, memory relief, and clipboard reply work

Squashes the working tree that had accumulated on cloud-agent. Two
strands of work, kept in one commit at the maintainer's request.

Crash and stability (this session):

- Subscribe to MetricKit so crash, hang, CPU, and disk-write diagnostics
  are recorded on device. Keyboard-extension memory kills are the most
  likely way a user loses the keyboard mid-sentence and iOS does not
  classify them as crashes, so they never reach App Store Connect.
- Upload those reports to POST /v1/analytics/diagnostics from internal
  builds only (local Debug and TestFlight), reusing the analytics
  installation identifier and skipping entirely when analytics are off.
  App Store builds keep everything on device.
- Shed the Chinese engine, English lexicon, and in-flight pipeline work
  at the 40 MiB and 48 MiB budget thresholds instead of waiting for a
  system memory warning that jetsam often preempts.
- Install audio taps with the input node's live format through one
  shared adaptive resampler, so an audio-route change mid-recording no
  longer raises an uncatchable format-mismatch exception. Covers the
  dictation preview and the Mac recorder, which still used the pattern
  the Flow capture path had already moved away from.
- Harden the librime bridge: never pass a nil string across a nonnull
  boundary when a user dictionary holds malformed UTF-8, null-check the
  engine API vector, and distrust a candidate count without its array.
- Guard the expanded candidate grid against a list that shrinks while
  the collection view is still laying out against the previous count.
- Resolve localized text without the App Group so the screen shown when
  that container is missing renders its message instead of crashing on
  launch, which is the one situation it exists to handle.
- Gate CI on the App Group and Keychain wiring that the keyboard
  extension hard-depends on, with a self-test proving the check fails.

Clipboard, reply, and semantics (pre-existing working tree):

- Unify the reply center, refresh keyboard AI features, and add native
  event and reminder exporters.
- Expand clipboard semantic routing with authored corpora and a
  product-blind holdout, plus the scripts that build and validate them.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

OSGKeyboardShared/zh-Hans.lproj/Shared.strings

@@ -67,11 +67,13 @@
 "error.cloudASR.invalidURL" = "云端识别接口地址无效。";
 "error.cloudASR.http" = "云端识别返回 HTTP %lld。";
 "error.cloudASR.httpWithMessage" = "云端识别返回 HTTP %lld：%@";
+"error.cloudASR.insufficientBalance" = "账户余额不足。部分模型即使标价 ¥0，也需账户有余额才能调用，请充值后重试。";
 "error.cloudASR.decoding" = "解析云端识别响应失败：%@";
 "error.cloudASR.transport" = "云端识别网络错误：%@";
 "error.cloudASR.emptyTranscript" = "云端识别返回了空文本。";
 "error.cloudASR.audioTooLong" = "音频片段超过该云端识别服务的时长限制。";
 "error.cloudASR.providerUnsupported" = "该服务商暂不支持云端语音识别。";
+"error.cloudASR.timedOut" = "连接检查超时。服务商未在规定时间内响应，请检查网络、API Key 与账户余额后重试。";
 "error.cloudASR.streamingNotImplemented" = "该服务商流式 ASR 失败。请检查 API Key 与网络后重试。";
 
 /* 托管账号网关 */
@@ -200,7 +202,7 @@
 "mac.styles.prompt" = "完整提示词";
 "mac.styles.hint" = "使用 {{DICTIONARY}} 指定个人词典位置；系统规则会自动追加。";
 "mac.styles.learn.title" = "生成专属风格";
-"mac.styles.learn.body" = "从历史听写中学习你的表达习惯。";
+"mac.styles.learn.body" = "从历史听写中学习你的表达习惯，用于 iPhone 键盘的 AI 回复。";
 "mac.styles.learn.progress" = "%lld / %lld 字";
 "mac.styles.learn.remaining" = "还差 %lld 字";
 "mac.styles.learn.ready" = "可以生成";
@@ -287,7 +289,6 @@
 "mac.delete" = "删除";
 "mac.dict.deleteTitle" = "删除该词条？";
 "mac.dict.deleteMessage" = "此操作无法撤销。";
-"mac.hint.holdOption" = "长按 Option 开始听写";
 "mac.settings.cloudProvider" = "云端服务商";
 "mac.settings.polishProvider" = "文本润色（LLM）";
 "mac.settings.asrProvider" = "语音转写（ASR）";
@@ -470,7 +471,6 @@
 "settings.appLanguage.english" = "英文";
 "settings.appLanguage.chinese" = "中文";
 
-
 /* Account — Mac account page (Sign in with Apple, credits, invitation link).
    The account.* / account.referral.* keys below mirror the iOS app bundle so
    the shared AccountSessionCoordinator error keys resolve on macOS too. */
@@ -523,3 +523,51 @@
 "account.referral.error.notFound" = "邀请链接暂不可用。";
 "account.referral.error.session" = "请重新登录后加载邀请链接。";
 "account.referral.error.unavailable" = "邀请服务暂时不可用。";
+
+/* 输入法引擎错误 */
+"error.rime.appGroupUnavailable" = "App Group 不可用。";
+"error.rime.bundledResourceMissing" = "缺少输入法资源：%@";
+"error.rime.lockUnavailable" = "输入法资源正在被其他进程更新。";
+"error.rime.deploymentFailed" = "输入法资源部署失败。";
+"error.rime.resourcesNotInstalled" = "请先打开 OSGKeyboard 完成输入法初始化。";
+"error.rime.hostAppRequired" = "输入法资源只能由 OSGKeyboard 主应用部署。";
+"error.rime.schemaUnavailable" = "输入方案不可用：%@";
+
+/* 文本润色错误 */
+"error.polish.noTranscript" = "没有可润色的文本。";
+"error.polish.timeout" = "大模型润色超时。";
+"error.polish.missingAPIKey" = "缺少 API 密钥——请先在设置中填写后再使用润色。";
+"error.polish.keychainLocked" = "设备锁定期间无法读取 API 密钥——解锁后即可使用。";
+
+/* 本地识别模型错误 */
+"error.localASR.downloadFailed" = "下载失败：%@";
+"error.localASR.extractFailed" = "解压失败：%@";
+"error.localASR.validationFailed" = "校验失败：%@";
+"error.localASR.runtimeMissing" = "尚未安装 Sherpa 运行时。";
+"error.localASR.binaryMissing" = "运行时包中找不到 Sherpa 可执行文件。";
+"error.localASR.missingBundledCatalog" = "缺少内置的本地识别模型清单。";
+"error.localASR.modelNotFound" = "找不到本地识别模型：%@";
+
+/* 账户服务错误 */
+"error.account.refreshTokenReuse" = "检测到刷新令牌被重复使用，会话已被吊销。";
+"error.account.transport" = "无法连接账户服务。";
+"error.account.invalidResponse" = "账户服务返回了无效响应。";
+"error.account.decoding" = "无法解析账户服务的响应。";
+"error.account.secureStorage" = "无法安全保存账户会话。";
+"error.account.sessionUnavailable" = "当前没有可用的账户会话。";
+"error.account.appleAuthorization" = "“通过 Apple 登录”未返回有效凭据。";
+"error.account.integrityUnavailable" = "设备完整性验证不可用。";
+
+/* 自定义语言模型错误 */
+"error.clm.missingManifest" = "缺少内置的自定义语言模型清单。";
+"error.clm.missingTrainingAsset" = "缺少内置的自定义语言模型训练资源。";
+"error.clm.missingAppGroupContainer" = "准备自定义语言模型时 App Group 容器不可用。";
+"error.clm.missingPreparedArtifacts" = "自定义语言模型准备未生成 LM/Vocab 产物。";
+"error.clm.retryBudgetExhausted" = "自定义语言模型准备的重试次数已用尽。";
+
+/* macOS 专有错误与状态 */
+"mac.error.speechDenied" = "语音识别权限被拒绝。";
+"mac.error.converterUnavailable" = "无法初始化音频转换器。";
+"mac.error.microphoneAccessDenied" = "麦克风权限被拒绝——请在「系统设置 → 隐私与安全性 → 麦克风」中启用。";
+"mac.accessibility.status.granted" = "已授权";
+"mac.accessibility.status.needed" = "未授权";