docs: update GEMINI.md and README.md [skip ci]

Author: SSARCandy

GEMINI.md

@@ -4,16 +4,16 @@
 Electron desktop app. Automate TDCC e-Voting. Login with ID. Find pending/voted company. Vote agree/against/abstain. Take screenshot proof. Logout safe. **Runs in background/unfocused. Notify user on completion/error.**
 
 ### Architecture
-- **Main (`main.js`)**: Manage window. Set `BrowserView`. Handle IPC. **Trigger system notifications when window unfocused.**
+- **Main (`main.js`)**: Manage window. Set `BrowserView` for automation. Handle IPC. **Trigger system notifications when window unfocused.**
 - **Preload (`preload.js`)**: Secure bridge renderer ↔ main (`contextBridge`).
 - **Renderer (`src/renderer/`)**: UI. HTML, Vanilla CSS, JS. No big framework.
-- **Auto Engine (`src/automation/`)**: Interact with TDCC.
+- **Auto Engine (`src/automation/`)**: Interact with TDCC via `webContents.executeJavaScript`.
   - `main_flow.js`: Control flow. Clear session. Respect TDCC maintenance time (00:00 - 07:00 UTC+8).
   - `login.js`: Auto login. Select cert. Handle native dialogs.
   - `voting.js`: Scrape target companies. Navigate vote form. Submit vote.
   - `screenshot.js`: Capture full-page proof. Save local.
   - `logout.js`: Find logout button. Click confirm. End session.
-  - `utils.js`: Reusable tools. `delay`, `randomDelay`, `safeExecute` (timeout prevent hang), `waitForNavigation`.
+  - `utils.js`: Reusable tools. `delay`, `randomDelay`, `safeExecute` (timeout prevent hang), `waitForNavigation`, `isMaintenanceTime`, `isScreenshotExists`, `calculateProgress`.
 
 ## Run App
 Use Node + Electron.
@@ -23,7 +23,8 @@ Use Node + Electron.
 ## Dev Rules
 - **Clean + Mod**: Small helper functions. JSDoc them.
 - **Variables**: `const` mostly. `let` only if mutate.
-- **Early Return**: Avoid deep `if/else`. Bail early if DOM missing.
+- **Early Return**: Avoid deep `if/else`. Favor early return to reduce nesting. Bail early if DOM missing.
+- **Surgical Changes**: Do not touch unrelated code or perform unrelated refactoring when adding new features.
 - **Fast**: No long fixed `delay()`. Use `waitForNavigation`, `safeExecute`, active polling. `some()`, `find()` for text match.
 - **Module**: CommonJS (`require`/`module.exports`).
 - **DOM**: Execute via `webContents.executeJavaScript`.
@@ -33,7 +34,7 @@ Use Node + Electron.
 - **No Crash**: `try/catch` automation steps. `sendLog` error to UI. Move to next account.
 - **Config**: Put URL in `src/constants.js`.
 - **UI**: Vanilla JS/CSS. No Tailwind.
-- **Style**: ESLint enforce `comma-dangle` object multiline.
+- **Style**: ESLint enforce `comma-dangle` object multiline (`"objects": "always-multiline"`).
 
 ## Use
 AI read this. Keep auto engine robust. DOM parsing break if site change. Time async careful.

README.md

@@ -15,6 +15,7 @@
 **✅ 智慧補截圖**：偵測儲存目錄，僅針對「已投票但缺截圖」的公司進行補圖，不重複作業。  
 **✅ 多帳號處理**：允許多個身分證字號，依次完成「登入、投票截圖、登出」完整循環。  
 **✅ 可背景執行**：支援背景執行與視窗最小化，任務完成或異常時發送系統通知。  
+**✅ 檢查最新版**：自動檢查最新版本並提示使用者更新，不錯過任何新功能！  
 
 ## ⚠️ 使用前準備 (重要)