chore: 初始提交 - 移除所有硬编码凭据，统一从环境变量读取

public/tools/calendar_voice/index.html

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+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
+  <title>语记日历 - Voice Calendar Note</title>
+  <link rel="stylesheet" href="style.css">
+</head>
+<body>
+  <div class="container">
+    <div class="voice-section">
+      <textarea id="voice-text" placeholder="点击“语音识别”开始说话，内容将显示在这里..."></textarea>
+      <div class="row-layout">
+        <button id="btn-record" class="btn btn-primary btn-large">
+          <span class="icon">🎤</span> <span class="text">语音识别</span>
+        </button>
+        <button id="btn-process" class="btn btn-secondary btn-large">
+          <span class="icon">⬇️</span> 整理至表单
+        </button>
+      </div>
+      <div id="recording-status" class="hidden">
+        <span class="pulse">●</span> 正在识别...
+      </div>
+    </div>
+
+    <div class="form-section">
+      <div class="form-group vertical">
+        <label for="event-title">标题</label>
+        <input type="text" id="event-title" placeholder="自动提取的核心主题">
+      </div>
+      
+      <div class="form-group vertical">
+        <label for="event-content">内容</label>
+        <textarea id="event-content" placeholder="自动提取的正文内容"></textarea>
+      </div>
+
+      <div class="form-group horizontal">
+        <label for="event-start">开始时间</label>
+        <div class="input-group">
+          <input type="datetime-local" id="event-start">
+          <button type="button" class="btn-now" data-target="event-start">🈺</button>
+        </div>
+      </div>
+
+      <div class="form-group horizontal">
+        <label for="event-end">结束时间</label>
+        <div class="input-group">
+          <input type="datetime-local" id="event-end">
+          <button type="button" class="btn-now" data-target="event-end">🈺</button>
+        </div>
+      </div>
+
+      <div class="form-group horizontal">
+        <label for="event-remind">提醒时间</label>
+        <div class="input-group">
+          <input type="datetime-local" id="event-remind">
+          <button type="button" class="btn-now" data-target="event-remind">🈺</button>
+        </div>
+      </div>
+    </div>
+
+    <div class="footer-actions">
+      <button id="btn-save" class="btn btn-success btn-large">保存</button>
+      <button id="btn-close" class="btn btn-danger btn-large">关闭</button>
+    </div>
+  </div>
+
+  <div id="loading-overlay" class="hidden">
+    <div class="modal-content">
+      <div class="spinner" id="modal-spinner"></div>
+      <div id="modal-logs" class="modal-logs"></div>
+      <button id="btn-modal-close" class="btn btn-secondary hidden" style="margin-top: 20px;">关闭窗口</button>
+    </div>
+  </div>
+
+  <script src="app.js"></script>
+</body>
+</html>