feat: 输入框提示行缓存统计三合一，余额口径统一与 i18n 集中化

README.md

@@ -48,12 +48,13 @@
 - **颜色自适应**：命中率 ≥85% 绿 · ≥70% 橙 · <70% 红，颜色从主题色自动去饱和
 - **Token 分布**：按角色（系统提示 / 用户 / Agent 指令 / Tool 调用 / Tool 结果）展示估算 Token 占比
 - **折叠记忆**：折叠状态持久化，重启后保持
-- **语言适配**：自动检测系统语言，支持 `/cache-lang` 运行时切换中/英文，偏好持久化
+- **语言适配**：支持 中文 / English / 日本語 / 한국어，自动检测系统语言，`/cache-lang` 运行时切换，偏好持久化优先
 - **多币种**：通过 `/cache-currency` 切换货币，费用和节省同步换算
 - **余额查询**：查询多家 AI 提供商的账户余额，支持自动切换跟随当前会话提供商
 - **斜杠命令**：`/cache-session` `/cache-session-back` `/cache-rate` `/cache-section` `/cache-config` `/cache-lang` 动态配置面板
 - **子代理缓存查看**：`/cache-session` 自动扫描并列出子代理，选择一个即可切换面板显示其缓存统计，支持 `/cache-session-back` 返回主会话
 - **已加载技能**：检测 session 中 LLM 调用 `skill` tool 的记录，展示已加载技能名及估算 Token 占用
+- **底部状态栏**：输入框提示行单行显示 命中率（含趋势）· Tokens · 余额，关闭侧边栏也能随时看到缓存统计，可经 `/cache-section` 隐藏
 
 ---
 
@@ -106,7 +107,7 @@ npm install -g opencode-visual-cache@latest
 | `/cache-session-back` | 返回主会话统计 | 从子代理缓存视图切回主会话 |
 | `/cache-currency` | 切换货币单位 | 从列表选择货币（USD / CNY / EUR / JPY / GBP / KRW），自动填入默认汇率 |
 | `/cache-rate` | 调整汇率乘数 | 输入自定义汇率（如 `7.2`），用于费用换算 |
-| `/cache-section` | 开关区块与边框 | 独立控制 Token 明细 / 模型与定价 / 估算 Token 分布 / 已加载技能 / 余额 / 面板边框的显隐 |
+| `/cache-section` | 开关区块与边框 | 独立控制 Token 明细 / 模型与定价 / 估算 Token 分布 / 已加载技能 / 余额 / 底部状态栏 / 面板边框的显隐 |
 | `/cache-config` | 查看当前配置 | 弹出当前货币、汇率、区块可见性状态 |
 | `/cache-lang` | 切换显示语言 | 从列表选择中文或 English，界面即时切换，无需重启 |
 | `/cache-balance` | 余额查询设置 | 选择余额提供商（菜单标注 Key 来源：用户 key / OpenCode / 未配置）/ 开关自动切换 |
@@ -145,6 +146,7 @@ npm install -g opencode-visual-cache@latest
 - **估算 Token 分布**：按角色拆分的 Token 估算
 - **已加载技能**：session 中 LLM 实际调用过的 Skill 名及估算 Token 占用
 - **余额**：当前提供商账户余额（多提供商 + 自动切换）
+- **底部状态栏**：输入框提示行的 命中率 · Tokens · 余额 单行统计
 
 通过 `/cache-section` 切换后即时生效，无需重启。此外，该命令还可以开关面板的**外边框**——关闭后内容会顶格显示，释放额外空间。
 
@@ -172,6 +174,10 @@ npm install -g opencode-visual-cache@latest
 > **自动切换**：默认开启；手动选择提供商后自动关闭，可在 `/cache-balance` 中重新开启。自动切换按当前会话的模型提供商匹配，未配置 Key 的提供商被选中时显示「未配置」提示。
 >
 > **希望支持**：已调研确认具备可行性的候选提供商，尚未实现。智谱 GLM 仅有社区逆向的非官方端点（无稳定性保障）。
+>
+> **统计口径**：命中率 = 缓存读 /（新鲜输入 + 缓存读 + 缓存写），与业界（OpenAI / Anthropic / Bedrock）口径一致；明细中「未命中」= 新鲜输入 + 缓存写。底部栏的 Tokens 为输入侧总量（不含输出）。未单独报告缓存写的提供商（如 DeepSeek）自动退化为 hit/miss 口径。
+>
+> **余额显示**：侧边栏与底部栏共享同一份余额数据，两处显示一致。当前提供商不支持余额查询时，侧边栏显示提示、底部栏隐藏余额项。
 
 ---
 
@@ -207,11 +213,11 @@ rm -rf ~/.cache/opencode/packages/opencode-visual-cache@latest
 
 ### 6.1 运行时切换（推荐）
 
-在 TUI 中输入 `/cache-lang`，从弹窗选择「中文」或「English」即可即时切换，无需重启。偏好会自动持久化，下次启动自动恢复。
+在 TUI 中输入 `/cache-lang`，从弹窗选择 中文 / English / 日本語 / 한국어 即可即时切换，无需重启。偏好会自动持久化，下次启动优先恢复用户选择。
 
 ### 6.2 环境变量覆盖
 
-启动前设置 `CACHE_TUI_LANG` 环境变量可强制指定语言：
+启动前设置 `CACHE_TUI_LANG` 环境变量可强制指定语言（`zh` / `en` / `ja` / `ko`）：
 
 ```powershell
 # Windows PowerShell

README_EN.md

@@ -48,12 +48,13 @@ Interested in sub-agent monitoring? Check out [opencode-subagent-magazine](https
 - **Adaptive Colors**: ≥85% green · ≥70% orange · <70% red, auto-desaturated from current theme
 - **Token Distribution**: Per-role (system / user / agent instr / tool call / tool result) estimated token breakdown
 - **Persistent State**: Fold preferences and config remembered across restarts via api.kv
-- **Language**: Auto-detects system locale, with `/cache-lang` for runtime switching between Chinese and English — preference persisted across restarts
+- **Language**: Chinese / English / 日本語 / 한국어, auto-detects system locale, with `/cache-lang` for runtime switching — user preference takes priority over auto-detection
 - **Multi-currency**: Switch via `/cache-currency` — costs, savings, and per-million rates convert in real time
 - **Balance Query**: Query account balance across multiple AI providers, with auto-switch following the current session's provider
 - **Slash Commands**: `/cache-session` `/cache-session-back` `/cache-rate` `/cache-section` `/cache-config` `/cache-lang` for live panel configuration
 - **Sub-Agent Cache View**: `/cache-session` auto-scans and lists sub-agents; select one to switch the panel stats. Use `/cache-session-back` to return to the main session
 - **Loaded Skills**: Detects `skill` tool calls in the session and displays loaded skill names with estimated token footprint
+- **Bottom Status Bar**: single-line hit rate (with trend) · Tokens · Balance in the prompt hint row — visible even with the sidebar closed; hide it anytime via `/cache-section`
 
 ---
 
@@ -106,7 +107,7 @@ The plugin supports slash commands and command palette (`Ctrl + P`) for runtime
 | `/cache-session-back` | Return to main session | Switch back to main session from sub-agent cache view |
 | `/cache-currency` | Switch currency | Pick from a list (USD / CNY / EUR / JPY / GBP / KRW); default exchange rate auto-filled |
 | `/cache-rate` | Adjust exchange rate | Enter a custom rate (e.g. `7.2` for CNY) |
-| `/cache-section` | Toggle sections & border | Independently show/hide Detail, Model & Pricing, Token Distribution, Loaded Skills, Balance, or the panel border |
+| `/cache-section` | Toggle sections & border | Independently show/hide Detail, Model & Pricing, Token Distribution, Loaded Skills, Balance, Bottom Bar, or the panel border |
 | `/cache-config` | View current config | Displays currency, rate, and section visibility |
 | `/cache-lang` | Switch display language | Pick Chinese or English from the dialog — takes effect immediately, no restart needed |
 | `/cache-balance` | Balance query settings | Pick a balance provider (menu shows key source: user key / OpenCode / not set) / toggle auto-switch |
@@ -145,6 +146,7 @@ Three sub-sections can be toggled independently to save sidebar space:
 - **Estimated Token Dist.**: per-role token breakdown
 - **Loaded Skills**: skill names the LLM actually loaded via the `skill` tool, with estimated token counts
 - **Balance**: the selected provider's account balance (multi-provider with auto-switch)
+- **Bottom Status Bar**: the single-line hit rate · Tokens · Balance stats in the prompt hint row
 
 Toggled via `/cache-section` — takes effect instantly, no restart required. The same command also toggles the panel **border**; turning it off removes the outline and padding so content fills the full width.
 
@@ -170,6 +172,10 @@ Supported balance providers:
 > **Auto-switch**: enabled by default; picking a provider manually disables it — re-enable anytime via `/cache-balance`. Auto-switch matches the current session's model provider; a provider without a key shows a "not set" hint when selected.
 >
 > **Planned**: candidates confirmed feasible by research, not yet implemented. Zhipu GLM only has a community-reversed unofficial endpoint (no stability guarantee).
+>
+> **Metric semantics**: hit rate = cache read / (fresh input + cache read + cache write), consistent with the industry (OpenAI / Anthropic / Bedrock). "Miss" in the detail view = fresh input + cache write. The bottom-bar Tokens is the input-side total (output excluded). Providers that do not report cache writes separately (e.g. DeepSeek) automatically fall back to the hit/miss formula.
+>
+> **Balance display**: the sidebar and bottom bar share the same balance data, so both show identical values. When the current provider has no balance adapter, the sidebar shows a hint and the bottom bar hides the balance segment.
 
 ---
 
@@ -205,11 +211,11 @@ The plugin provides three ways to control the display language, listed by priori
 
 ### 6.1 Runtime Switching (recommended)
 
-Type `/cache-lang` in the TUI and select **Chinese** or **English** from the dialog. The panel switches immediately without restarting, and your preference is persisted automatically for the next session.
+Type `/cache-lang` in the TUI and select Chinese / English / 日本語 / 한국어 from the dialog. The panel switches immediately without restarting. Your preference is persisted and takes priority over auto-detection on the next launch.
 
 ### 6.2 Environment Variable Override
 
-Set the `CACHE_TUI_LANG` environment variable before launching to force a specific language:
+Set the `CACHE_TUI_LANG` environment variable before launching to force a specific language (`zh` / `en` / `ja` / `ko`):
 
 ```powershell
 # Windows PowerShell