kangyu
/
vent_deep_agent


			
				
					
						
						
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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">
<title>煤矿通风智能解读系统</title>
<style>
/* ============================================================
   CSS Variables & Reset — Zcode/Codex Dark Theme
   ============================================================ */
:root {
  --bg-primary: #1e1e2e;
  --bg-secondary: #181825;
  --bg-tertiary: #11111b;
  --bg-surface: #242438;
  --bg-hover: #2a2a40;
  --border: #313244;
  --text-primary: #cdd6f4;
  --text-secondary: #a6adc8;
  --text-muted: #6c7086;
  --accent: #89b4fa;
  --accent-dim: #74a0e0;
  --green: #a6e3a1;
  --yellow: #f9e2af;
  --red: #f38ba8;
  --orange: #fab387;
  --purple: #cba6f7;
  --font-mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --radius: 8px;
  --radius-sm: 4px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  background: var(--bg-primary);
  color: var(--text-primary);
  display: flex; flex-direction: column;
}

/* ============================================================
   Layout
   ============================================================ */
.app { display: flex; height: 100vh; overflow: hidden; }

/* Sidebar — Session List */
.sidebar {
  width: 260px; min-width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.sidebar-header {
  padding: 16px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.sidebar-header h2 { font-size: 15px; font-weight: 600; color: var(--accent); }
.btn-new {
  width: 32px; height: 32px; border-radius: var(--radius-sm);
  background: var(--accent); color: var(--bg-tertiary); border: none;
  font-size: 18px; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background .15s;
}
.btn-new:hover { background: var(--accent-dim); }
.session-list {
  flex: 1; overflow-y: auto; padding: 8px;
}
.session-item {
  padding: 10px 12px; border-radius: var(--radius-sm);
  cursor: pointer; margin-bottom: 4px; font-size: 13px;
  display: flex; align-items: center; justify-content: space-between;
  color: var(--text-secondary); transition: background .1s;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.session-item:hover { background: var(--bg-hover); }
.session-item.active { background: var(--bg-surface); color: var(--text-primary); }
.session-item .title { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.session-item .count { font-size: 11px; color: var(--text-muted); margin-left: 8px; }
.btn-delete {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-size: 16px; padding: 0 4px; opacity: 0; transition: opacity .1s;
}
.session-item:hover .btn-delete { opacity: 1; }
.btn-delete:hover { color: var(--red); }
.btn-pin {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-size: 13px; padding: 0 2px; opacity: 0; transition: opacity .1s, color .15s;
}
.session-item:hover .btn-pin { opacity: 1; }
.btn-pin:hover { color: var(--yellow); }
.btn-pin.pinned { opacity: 1; color: var(--yellow); }

/* Main Chat Area */
.main {
  flex: 1; display: flex; flex-direction: column;
  min-width: 0; background: var(--bg-primary);
}
.chat-header {
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  font-size: 14px; font-weight: 600; color: var(--text-secondary);
  display: flex; align-items: center; gap: 8px;
}
.chat-header .status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--green);
}
.chat-header .status-dot.streaming { background: var(--yellow); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }

.messages {
  flex: 1; overflow-y: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
}

/* Message bubbles */
.msg { max-width: 85%; animation: fadeIn .2s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:translateY(0)} }
.msg.user { align-self: flex-end; }
.msg.assistant { align-self: flex-start; }
.msg .role {
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  margin-bottom: 4px; color: var(--text-muted);
}
.msg.user .role { text-align: right; }
.msg .bubble {
  padding: 12px 16px; border-radius: var(--radius); line-height: 1.6;
  word-break: break-word;
}
.msg.user .bubble { background: var(--bg-surface); border: 1px solid var(--border); }
.msg.assistant .bubble { background: transparent; padding: 0; }

/* Markdown inside assistant bubble */
.msg.assistant .bubble h1,.msg.assistant .bubble h2,.msg.assistant .bubble h3 {
  margin: 16px 0 8px; font-weight: 600; color: var(--accent);
}
.msg.assistant .bubble h1 { font-size: 1.3em; }
.msg.assistant .bubble h2 { font-size: 1.15em; }
.msg.assistant .bubble h3 { font-size: 1em; }
.msg.assistant .bubble h4 { font-size: 0.95em; font-weight: 600; margin: 12px 0 6px; }
.msg.assistant .bubble h5 { font-size: 0.9em; font-weight: 600; margin: 10px 0 4px; color: var(--text-secondary); }
.msg.assistant .bubble h6 { font-size: 0.85em; font-weight: 600; margin: 8px 0 4px; color: var(--text-muted); }
.msg.assistant .bubble p { margin: 4px 0; }
.msg.assistant .bubble ul,.msg.assistant .bubble ol { padding-left: 20px; margin: 8px 0; }
.msg.assistant .bubble li { margin: 2px 0; }
.msg.assistant .bubble code {
  font-family: var(--font-mono); font-size: 0.9em;
  background: var(--bg-tertiary); padding: 2px 6px; border-radius: var(--radius-sm);
}
.msg.assistant .bubble pre {
  background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 16px; overflow-x: auto;
  margin: 8px 0; font-size: 13px; line-height: 1.5;
}
.msg.assistant .bubble pre code { background: none; padding: 0; }
.msg.assistant .bubble table {
  border-collapse: collapse; width: 100%; margin: 8px 0; font-size: 13px;
}
.msg.assistant .bubble th,.msg.assistant .bubble td {
  border: 1px solid var(--border); padding: 6px 10px; text-align: left;
}
.msg.assistant .bubble th { background: var(--bg-surface); font-weight: 600; }
.msg.assistant .bubble strong { color: var(--yellow); }
.msg.assistant .bubble blockquote {
  border-left: 3px solid var(--accent); padding-left: 12px;
  color: var(--text-secondary); margin: 8px 0;
}

/* Thinking block */
.think-block {
  margin: 8px 0; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  background: var(--bg-surface);
}
.think-block summary {
  padding: 8px 12px; cursor: pointer; font-size: 12px;
  color: var(--text-muted); background: var(--bg-tertiary);
  user-select: none; display: flex; align-items: center; gap: 6px;
  transition: color .15s;
}
.think-block summary:hover { color: var(--accent); }
.think-block summary::marker { font-size: 10px; }
.think-block .think-content {
  padding: 10px 14px; font-size: 12px; color: var(--text-muted);
  line-height: 1.6; max-height: 300px; overflow-y: auto;
  font-family: var(--font-sans); white-space: pre-wrap;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}
.think-block summary .think-icon { animation: spin 2s linear infinite; display: inline-block; }
.think-block[open] summary .think-icon { animation: none; }

/* Duration badge */
.msg-duration {
  font-size: 11px; color: var(--text-muted); margin-top: 4px;
  display: flex; align-items: center; gap: 4px;
}

/* Agent card — container for sub-agent tools + progress */
.agent-card {
  margin: 6px 0; border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  background: var(--bg-surface); font-size: 12px;
  border-left: 3px solid var(--accent);
  transition: border-color .3s;
}
.agent-card.running { border-left-color: var(--yellow); }
.agent-card.done { border-left-color: var(--green); }
.agent-card.error { border-left-color: var(--red); }
.agent-card .agent-header {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; background: var(--bg-tertiary);
}
.agent-card .agent-icon {
  width: 16px; height: 16px; flex-shrink: 0;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; line-height: 1;
}
/* 运行中：环形旋转 spinner */
.agent-card.running .agent-icon {
  width: 14px; height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--yellow);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  font-size: 0;
}
/* 完成/错误：emoji 居中 */
.agent-card.done .agent-icon,
.agent-card.error .agent-icon {
  border: none; width: 16px; height: 16px;
  animation: none; font-size: 12px;
}
.agent-card .agent-name { color: var(--text-secondary); flex: 1; font-weight: 500; }
.agent-card .agent-status { font-size: 11px; color: var(--text-muted); }
.agent-card .agent-body {
  padding: 2px 0;
  max-height: 250px; overflow-y: auto;
}
	/* ── 工具翻页动画（仅显示当前正在执行的一个工具）── */
	.agent-body .tool-flipper {
	  perspective: 600px;
	  min-height: 30px;
	  overflow: hidden;
	}
	.agent-body .current-tool {
	  padding: 5px 12px; font-size: 11px;
	  display: flex; align-items: center; gap: 6px;
	  color: var(--text-muted);
	  transform-origin: center center;
	  backface-visibility: hidden;
	}
	.agent-body .current-tool.flip-out {
	  animation: toolFlipOut 0.28s ease forwards;
	  pointer-events: none;
	}
	.agent-body .current-tool.flip-in {
	  animation: toolFlipIn 0.32s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
	}
	@keyframes toolFlipIn {
	  from { transform: rotateX(100deg); opacity: 0; }
	  to   { transform: rotateX(0deg); opacity: 1; }
	}
	@keyframes toolFlipOut {
	  from { transform: rotateX(0deg); opacity: 1; }
	  to   { transform: rotateX(-100deg); opacity: 0; }
	}
.agent-body .current-tool .mt-icon { font-size: 12px; flex-shrink: 0; width: 14px; height: 14px; display: inline-flex; align-items: center; justify-content: center; }
.agent-body .current-tool .mt-name { flex: 1; color: var(--yellow); }
.agent-body .current-tool.done .mt-name { color: var(--text-secondary); }
/* 工具执行中的环形旋转 spinner */
.spin-icon-sm {
  display: inline-block;
  width: 10px; height: 10px;
  border: 2px solid var(--border);
  border-top-color: var(--yellow);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
  vertical-align: middle;
}
/* Nested mini todo inside agent body */
.agent-body .mini-todo {
  display: flex; align-items: center; gap: 4px;
  padding: 3px 12px; font-size: 11px; color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.agent-body .mini-todo .mt-check {
  width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
  border: 2px solid var(--border);
}
.agent-body .mini-todo.completed .mt-check { background: var(--green); border-color: var(--green); }
.agent-body .mini-todo.in_progress .mt-check { border-color: var(--yellow); background: var(--yellow); }
.agent-body .mini-todo .mt-label { flex: 1; font-size: 11px; }
.agent-body .mini-todo.completed .mt-label { text-decoration: line-through; }

/* Tool call card (standalone, outside agent) */
.tool-card {
  margin: 6px 0; padding: 8px 12px; border-radius: var(--radius-sm);
  background: var(--bg-surface); border-left: 3px solid var(--accent);
  font-size: 12px; display: flex; align-items: center; gap: 8px;
}
.tool-card.pending { border-left-color: var(--yellow); }
.tool-card.done { border-left-color: var(--green); }
.tool-card .tool-icon { font-size: 14px; }
.tool-card .tool-name { color: var(--text-secondary); flex: 1; }
.tool-card .tool-status { font-size: 11px; color: var(--text-muted); }

/* Status bar (agent thinking/executing) */
.status-bar {
  padding: 6px 16px; font-size: 12px; color: var(--text-muted);
  border-top: 1px solid var(--border); display: flex; align-items: center; gap: 8px;
  min-height: 32px;
}
.status-bar .spinner {
  width: 12px; height: 12px; border: 2px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%; animation: spin .6s linear infinite;
}
@keyframes spin { to{transform:rotate(360deg)} }

/* Input area */
.input-area {
  padding: 12px 20px; border-top: 1px solid var(--border);
  display: flex; gap: 10px; align-items: center; position: relative;
  flex-wrap: wrap;
}
.input-area textarea {
  flex: 1; background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text-primary); padding: 10px 14px;
  font-family: var(--font-sans); font-size: 14px; resize: none; outline: none;
  min-height: 44px; max-height: 150px; line-height: 1.4;
  transition: border-color .15s;
}
.input-area textarea:focus { border-color: var(--accent); }
.btn-send {
  width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--accent); color: var(--bg-tertiary); border: none;
  font-size: 18px; cursor: pointer; transition: background .15s;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.btn-send:hover { background: var(--accent-dim); }
.btn-send:disabled { background: var(--border); cursor: not-allowed; }
.btn-attach {
  width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--bg-surface); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  transition: background .1s, border-color .1s;
}
.btn-attach:hover { border-color: var(--accent); color: var(--accent); }
.btn-attach.has-file { border-color: var(--green); color: var(--green); }
.btn-insert-session {
  width: 44px; height: 44px; border-radius: var(--radius);
  background: var(--bg-surface); border: 1px solid var(--border);
  color: var(--text-secondary); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  transition: background .1s, border-color .1s;
}
.btn-insert-session:hover { border-color: var(--accent); color: var(--accent); }
.btn-insert-session.active { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* Session reference chip */
.session-ref-chip {
  display: flex; align-items: center; gap: 6px;
  background: var(--accent-dim); border: 1px solid var(--accent);
  border-radius: 6px; padding: 4px 10px; font-size: 12px;
  color: var(--accent); width: 100%; flex-shrink: 0;
}
.session-ref-chip .chip-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-ref-chip .chip-remove {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-size: 16px; padding: 0 2px; line-height: 1;
}
.session-ref-chip .chip-remove:hover { color: var(--red); }

/* Session picker panel */
.session-picker {
  position: absolute; bottom: 100%; left: 12px; right: 12px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  z-index: 100; max-height: 320px; display: flex; flex-direction: column;
  margin-bottom: 8px;
}
.picker-search { padding: 10px; border-bottom: 1px solid var(--border); flex-shrink: 0; }
.picker-search input {
  width: 100%; background: var(--bg-tertiary); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text-primary); padding: 8px 12px;
  font-size: 13px; outline: none; box-sizing: border-box;
}
.picker-search input:focus { border-color: var(--accent); }
.picker-search input::placeholder { color: var(--text-muted); }
.picker-list { flex: 1; overflow-y: auto; padding: 6px 0; }
.picker-item {
  padding: 10px 14px; cursor: pointer; font-size: 13px;
  color: var(--text-primary); transition: background .1s;
  display: flex; justify-content: space-between; align-items: center;
  gap: 8px;
}
.picker-item:hover { background: var(--bg-hover); }
.picker-item .picker-title {
  flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.picker-item .picker-meta {
  font-size: 11px; color: var(--text-muted); flex-shrink: 0;
}
.picker-empty {
  padding: 20px; text-align: center; color: var(--text-muted); font-size: 13px;
}
#file-input { display: none; }

/* Detail Panel (right) */
.detail-panel {
  width: 280px; min-width: 280px;
  background: var(--bg-secondary); border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
.detail-panel h3 {
  padding: 16px; font-size: 13px; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px; border-bottom: 1px solid var(--border);
}
.detail-content { flex: 1; overflow-y: auto; padding: 12px; }
.detail-content .section { margin-bottom: 16px; }
.detail-content .section-title {
  font-size: 11px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; margin-bottom: 8px;
}
.todo-item {
  display: flex; align-items: center; gap: 8px; padding: 4px 0; font-size: 12px;
}
.todo-item .todo-check {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid var(--border); flex-shrink: 0;
}
.todo-item.completed .todo-check { background: var(--green); border-color: var(--green); }
.todo-item.in_progress .todo-check { border-color: var(--yellow); background: var(--yellow); }
.todo-item .todo-label { color: var(--text-secondary); }
.todo-item.completed .todo-label { text-decoration: line-through; color: var(--text-muted); }

.tool-log-item {
  font-size: 11px; padding: 4px 0; color: var(--text-muted);
  border-bottom: 1px solid var(--border); display: flex; gap: 6px;
}
.tool-log-item .tl-icon { flex-shrink: 0; }
.tool-log-item .tl-name { color: var(--text-secondary); }

/* Toast */
.toast {
  position: fixed; top: 16px; right: 16px; padding: 10px 16px;
  border-radius: var(--radius); font-size: 13px; z-index: 1000;
  animation: slideIn .2s ease; max-width: 400px;
}
.toast.error { background: var(--red); color: #fff; }
.toast.info { background: var(--accent); color: var(--bg-tertiary); }
@keyframes slideIn { from{transform:translateX(100%)} to{transform:translateX(0)} }

/* Download Button */
.download-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; margin: 12px 0;
  background: var(--green); color: var(--bg-tertiary);
  border: none; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; cursor: pointer;
  text-decoration: none; transition: background .15s, transform .1s;
}
.download-btn:hover { background: #8fd98f; transform: translateY(-1px); }
.download-btn:active { transform: translateY(0); }
.download-btn .dl-icon { font-size: 18px; }

/* Empty state */
.empty-state {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  justify-content: center; color: var(--text-muted); gap: 12px;
}
.empty-state .big-icon { font-size: 48px; opacity: .3; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Responsive: hide detail panel on small screens */
@media (max-width: 1000px) { .detail-panel { display: none; } }
@media (max-width: 700px) { .sidebar { display: none; } }

/* ============================================================
   Model Selector — dropdown in chat header
   ============================================================ */
.model-selector {
  position: relative; margin-left: auto; font-size: 12px;
  user-select: none; z-index: 100;
}
.model-selector .current {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: var(--radius-sm);
  background: var(--bg-surface); border: 1px solid var(--border);
  cursor: pointer; color: var(--text-secondary);
  transition: border-color .15s, background .15s;
  white-space: nowrap;
}
.model-selector .current:hover {
  border-color: var(--accent); background: var(--bg-hover);
}
.model-selector .current .model-icon { font-size: 13px; }
.model-selector .current .model-name { font-weight: 500; }
.model-selector .current .model-arrow {
  font-size: 9px; color: var(--text-muted); transition: transform .2s;
}
.model-selector.open .current .model-arrow { transform: rotate(180deg); }
.model-selector .dropdown {
  position: absolute; top: calc(100% + 4px); right: 0;
  min-width: 200px; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.4); overflow: hidden;
  animation: dropdownIn .15s ease;
}
@keyframes dropdownIn { from{opacity:0;transform:translateY(-4px)} to{opacity:1;transform:translateY(0)} }
.model-selector .dropdown .model-option {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 14px; cursor: pointer; color: var(--text-secondary);
  transition: background .1s; border-bottom: 1px solid var(--border);
}
.model-selector .dropdown .model-option:last-child { border-bottom: none; }
.model-selector .dropdown .model-option:hover { background: var(--bg-hover); }
.model-selector .dropdown .model-option.active { color: var(--accent); background: var(--bg-surface); }
.model-selector .dropdown .model-option .opt-tag {
  font-size: 10px; padding: 2px 6px; border-radius: 3px;
  font-weight: 600; text-transform: uppercase; flex-shrink: 0;
}
.model-selector .dropdown .model-option .opt-tag.pro { background: rgba(203,166,247,.2); color: var(--purple); }
.model-selector .dropdown .model-option .opt-tag.flash { background: rgba(166,227,161,.2); color: var(--green); }
.model-selector .dropdown .model-option .opt-name { flex: 1; }
.model-selector .dropdown .model-option .opt-check { color: var(--accent); font-size: 12px; }

/* Thinking Level Toggle — button group */
.thinking-toggle {
  display: flex; align-items: center; gap: 2px;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 2px;
  font-size: 11px; user-select: none;
}
.thinking-toggle .thinking-label {
  padding: 0 6px; color: var(--text-muted); font-size: 12px;
}
.thinking-toggle button {
  padding: 3px 8px; border: none; border-radius: 3px;
  background: transparent; color: var(--text-muted);
  font-family: var(--font-sans); font-size: 11px; cursor: pointer;
  transition: background .12s, color .12s;
}
.thinking-toggle button:hover { color: var(--text-primary); }
.thinking-toggle button.active {
  background: var(--accent); color: var(--bg-tertiary); font-weight: 600;
}

/* ============================================================
   Skill Manager Modal
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center;
  animation: fadeIn .15s ease;
}
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: var(--radius); width: 720px; max-width: 95vw;
  max-height: 82vh; display: flex; flex-direction: column;
  box-shadow: 0 16px 48px rgba(0,0,0,.5);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; font-weight: 600; color: var(--accent); }
.modal-header .modal-actions { display: flex; gap: 8px; }
.modal-body {
  flex: 1; overflow-y: auto; padding: 16px 18px;
}
.modal-body .skill-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.modal-body .skill-table th, .modal-body .skill-table td {
  padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.modal-body .skill-table th { color: var(--text-muted); font-weight: 600; font-size: 11px; text-transform: uppercase; }
.modal-body .skill-table td { color: var(--text-secondary); }
.modal-body .skill-table .skill-desc { max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.modal-body .skill-table .skill-agents { font-size: 10px; color: var(--text-muted); }
.modal-body .skill-table .skill-name { color: var(--accent); font-weight: 500; cursor: pointer; }
.modal-body .skill-table .skill-name:hover { text-decoration: underline; }
.modal-body .status-badge {
  display: inline-block; padding: 2px 8px; border-radius: 3px;
  font-size: 10px; font-weight: 600; text-transform: uppercase;
}
.modal-body .status-badge.enabled { background: rgba(166,227,161,.2); color: var(--green); }
.modal-body .status-badge.disabled { background: rgba(243,139,168,.2); color: var(--red); }
.modal-body .skill-detail {
  margin-top: 12px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-surface); padding: 14px 18px; font-size: 12px;
  max-height: 300px; overflow-y: auto; line-height: 1.6;
  display: none;
}
.modal-body .skill-detail h1,.modal-body .skill-detail h2,.modal-body .skill-detail h3 { color: var(--accent); margin: 12px 0 6px; }
.modal-body .skill-detail code {
  font-family: var(--font-mono); background: var(--bg-tertiary); padding: 1px 5px; border-radius: 3px; font-size: 11px;
}
.upload-zone {
  margin-top: 12px; border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 20px; text-align: center; color: var(--text-muted); font-size: 12px;
  cursor: pointer; transition: border-color .15s, background .15s;
}
.upload-zone:hover { border-color: var(--accent); background: var(--bg-surface); }
.upload-zone.dragover { border-color: var(--green); background: rgba(166,227,161,.05); }
.upload-zone input[type="file"] { display: none; }

/* ============================================================
   Mode Selector — permission mode dropdown
   ============================================================ */
.mode-selector {
  position: relative; font-size: 11px; user-select: none; z-index: 99;
}
.mode-selector .mode-current {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 8px; border-radius: var(--radius-sm);
  background: var(--bg-surface); border: 1px solid var(--border);
  cursor: pointer; color: var(--text-secondary); white-space: nowrap;
  transition: border-color .15s, background .15s;
}
.mode-selector .mode-current:hover { border-color: var(--accent); }
.mode-selector .mode-dot {
  width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
}
.mode-selector .mode-dot.plan { background: var(--purple); }
.mode-selector .mode-dot.full { background: var(--red); }
.mode-selector .mode-dropdown {
  display: none; position: absolute; top: calc(100% + 4px); right: 0;
  min-width: 180px; background: var(--bg-secondary);
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.4); overflow: hidden;
  animation: dropdownIn .15s ease;
}
.mode-selector.open .mode-dropdown { display: block; }
.mode-selector .mode-option {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 14px; cursor: pointer; color: var(--text-secondary);
  transition: background .1s; border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.mode-selector .mode-option:last-child { border-bottom: none; }
.mode-selector .mode-option:hover { background: var(--bg-hover); }
.mode-selector .mode-option.active { color: var(--accent); background: var(--bg-surface); }
.mode-selector .mode-option .mode-opt-name { flex: 1; font-weight: 500; }
.mode-selector .mode-option .mode-opt-desc { font-size: 10px; color: var(--text-muted); }
.mode-selector .mode-option .mode-opt-check { color: var(--accent); font-size: 11px; }

/* Interrupt approval card */
.interrupt-card {
  margin: 8px 0; padding: 12px 16px; border-radius: var(--radius);
  border: 1px solid var(--yellow); background: rgba(249,226,175,.06);
  display: flex; align-items: center; gap: 12px; font-size: 12px;
}
.interrupt-card .interrupt-msg { flex: 1; color: var(--yellow); }
.interrupt-card button {
  padding: 5px 14px; border-radius: var(--radius-sm);
  border: none; font-size: 12px; cursor: pointer; font-weight: 500;
  transition: background .15s;
}
.interrupt-card .btn-approve { background: var(--green); color: var(--bg-tertiary); }
.interrupt-card .btn-approve:hover { background: #8fd98f; }
.interrupt-card .btn-reject { background: var(--red); color: #fff; }
.interrupt-card .btn-reject:hover { background: #e06c80; }

/* ============================================================
   Context Capacity Meter — detail panel
   ============================================================ */
.context-meter { margin-bottom: 12px; }
.context-meter .cm-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px; font-size: 11px;
}
.context-meter .cm-header .cm-label { color: var(--text-muted); text-transform: uppercase; font-weight: 600; }
.context-meter .cm-header .cm-value { color: var(--text-secondary); font-weight: 500; }
.context-meter .cm-bar-outer {
  height: 6px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; margin-bottom: 8px;
}
.context-meter .cm-bar-inner {
  height: 100%; border-radius: 3px; transition: width .4s ease, background .4s ease;
}
.context-meter .cm-bar-inner.low    { background: var(--green); }
.context-meter .cm-bar-inner.medium { background: var(--yellow); }
.context-meter .cm-bar-inner.high   { background: var(--orange); }
.context-meter .cm-bar-inner.crit   { background: var(--red); }
.context-meter .cm-breakdown {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2px 12px; font-size: 10px;
}
.context-meter .cm-breakdown .cm-item {
  display: flex; justify-content: space-between; color: var(--text-muted);
}
.context-meter .cm-breakdown .cm-item .cm-cat { flex: 1; }
.context-meter .cm-breakdown .cm-item .cm-num { font-weight: 500; color: var(--text-secondary); }
.context-meter .cm-empty {
  font-size: 10px; color: var(--text-muted); text-align: center; padding: 8px 0;
}
</style>
</head>
<body>

<div class="app">
  <!-- ============ Sidebar: Session List ============ -->
  <aside class="sidebar">
    <div class="sidebar-header">
      <h2>💨 通风智能助手</h2>
      <div style="display:flex;gap:6px;">
        <button class="btn-new" onclick="openSkillManager()" title="技能管理" style="font-size:14px;">📋</button>
        <button class="btn-new" onclick="newSession()" title="新建会话">+</button>
      </div>
    </div>
    <div class="session-list" id="session-list"></div>
  </aside>

  <!-- ============ Main Chat Area ============ -->
  <main class="main">
    <div class="chat-header">
      <span class="status-dot" id="status-dot"></span>
      <span id="chat-title">新会话</span>
      <!-- Model Selector -->
      <div class="model-selector" id="model-selector">
        <div class="current" onclick="toggleModelDropdown()">
          <span class="model-icon">🧠</span>
          <span class="model-name" id="current-model-label">deepseek-v4-pro</span>
          <span class="model-arrow">▼</span>
        </div>
        <div class="dropdown" id="model-dropdown" style="display:none"></div>
      </div>
      <!-- Thinking Level Toggle -->
      <div class="thinking-toggle" id="thinking-toggle">
        <span class="thinking-label">💭</span>
        <button data-level="off" class="active" onclick="switchThinking('off')">关闭</button>
        <button data-level="high" onclick="switchThinking('high')">高</button>
        <button data-level="highest" onclick="switchThinking('highest')">最高</button>
      </div>
      <!-- Mode Selector -->
      <div class="mode-selector" id="mode-selector">
        <div class="mode-current" onclick="toggleModeDropdown()">
          <span class="mode-dot plan" id="mode-dot"></span>
          <span id="mode-label">计划模式</span>
          <span style="font-size:9px;color:var(--text-muted)">▼</span>
        </div>
        <div class="mode-dropdown" id="mode-dropdown"></div>
      </div>
    </div>
    <div class="messages" id="messages">
      <div class="empty-state">
        <div class="big-icon">⛏️</div>
        <div>煤矿通风数据智能解读系统</div>
        <div style="font-size:12px">输入问题或上传配风计划 PDF 开始分析</div>
      </div>
    </div>
    <div class="status-bar" id="status-bar"></div>
    <div class="input-area" id="input-area">
      <button class="btn-attach" id="btn-attach" onclick="document.getElementById('file-input').click()" title="上传附件">📎</button>
      <button class="btn-insert-session" id="btn-insert-session" onclick="toggleSessionPicker()" title="插入会话">📋</button>
      <input type="file" id="file-input" accept=".pdf,.doc,.docx,.txt" onchange="onFileSelected(this)">
      <!-- 引用会话 chip -->
      <div class="session-ref-chip" id="session-ref-chip" style="display:none;">
        <span class="chip-label">📋 引用: <span id="chip-title"></span></span>
        <button class="chip-remove" onclick="removeSessionRef()" title="取消引用">×</button>
      </div>
      <textarea id="input" placeholder="输入您的问题..." rows="1" onkeydown="onInputKey(event)"></textarea>
      <button class="btn-send" id="btn-send" onclick="sendMessage()" title="发送">↑</button>
      <!-- 会话选择面板 -->
      <div class="session-picker" id="session-picker" style="display:none;">
        <div class="picker-search">
          <input type="text" id="picker-search-input" placeholder="搜索会话标题..." oninput="onPickerSearch(this.value)">
        </div>
        <div class="picker-list" id="picker-list"></div>
      </div>
    </div>
  </main>

  <!-- ============ Detail Panel ============ -->
  <aside class="detail-panel" id="detail-panel">
    <h3>📋 任务详情</h3>
    <div class="detail-content" id="detail-content">
      <div style="color:var(--text-muted);font-size:12px;text-align:center;margin-top:40px;">
        发送消息后<br>此处显示任务进度和工具调用
      </div>
    </div>
  </aside>
</div>

<!-- Toast container -->
<div id="toast-container"></div>

<!-- ============ Skill Manager Modal ============ -->
<div class="modal-overlay" id="skill-modal" style="display:none;" onclick="if(event.target===this) closeSkillModal()">
  <div class="modal">
    <div class="modal-header">
      <h3>📋 技能管理</h3>
      <div class="modal-actions">
        <button class="btn-send" onclick="document.getElementById('skill-upload-input').click()" style="width:auto;padding:6px 14px;font-size:12px;">📤 上传技能</button>
        <button class="btn-send" onclick="closeSkillModal()" style="width:auto;padding:6px 14px;font-size:12px;background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);">✕ 关闭</button>
      </div>
    </div>
    <div class="modal-body" id="skill-modal-body">
      <div style="text-align:center;color:var(--text-muted);padding:40px;">加载中...</div>
    </div>
    <!-- Hidden upload input -->
    <input type="file" id="skill-upload-input" accept=".zip" onchange="uploadSkill(this)" style="display:none;">
  </div>
</div>

<script>
// ============================================================
// State
// ============================================================
const API = '/api';
let currentSessionId = localStorage.getItem('vent_session_id') || null;
let currentAbortController = null;
let todoItems = [];
let toolLogs = [];
let activeThinkBlock = null;
let pendingDownloadUrl = null;
let referencedSessionId = null;       // 引用的会话 ID
let referencedSessionTitle = '';      // 引用的会话标题
let pickerDebounceTimer = null;       // 搜索防抖

// ── 认证令牌 ──
// 支持从 localStorage（key: x-access-token）或 URL 参数获取
function getAccessToken() {
  const fromStorage = localStorage.getItem('x-access-token');
  if (fromStorage) return fromStorage;
  const params = new URLSearchParams(window.location.search);
  return params.get('token') || '';
}

function authHeaders(extra = {}) {
  const token = getAccessToken();
  const headers = { ...extra };
  if (token) headers['x-access-token'] = token;
  return headers;
}

// ============================================================
// Init
// ============================================================
document.addEventListener('DOMContentLoaded', () => {
  loadSessions();
  if (currentSessionId) loadHistory(currentSessionId);
  fetchModels();
  if (currentSessionId) fetchSessionMode();
});

// ============================================================
// Model Switching
// ============================================================
const MODEL_TAGS = {
  'deepseek-v4-pro': { tag: 'PRO', cls: 'pro', desc: '深度推理 · 高精度' },
  'deepseek-v4-flash': { tag: 'FLASH', cls: 'flash', desc: '快速响应 · 低延迟' },
};

async function fetchModels() {
  try {
    const res = await fetch(`${API}/model`);
    const data = await res.json();
    const current = data.current || 'deepseek-v4-pro';
    const available = data.available || ['deepseek-v4-pro', 'deepseek-v4-flash'];
    const thinkLevel = data.thinking_level || 'off';

    // Update current display
    document.getElementById('current-model-label').textContent = current;

    // Update thinking toggle buttons
    document.querySelectorAll('#thinking-toggle button').forEach(btn => {
      btn.classList.toggle('active', btn.dataset.level === thinkLevel);
    });

    // Render dropdown options
    const dropdown = document.getElementById('model-dropdown');
    dropdown.innerHTML = available.map(m => {
      const info = MODEL_TAGS[m] || { tag: m, cls: '', desc: '' };
      const isActive = m === current;
      return `<div class="model-option${isActive ? ' active' : ''}" onclick="switchModel('${m}')">
        <span class="opt-tag ${info.cls}">${info.tag}</span>
        <span class="opt-name">${m}</span>
        ${isActive ? '<span class="opt-check">✓</span>' : ''}
        <span style="font-size:10px;color:var(--text-muted)">${info.desc}</span>
      </div>`;
    }).join('');
  } catch(e) {
    console.error('获取模型列表失败', e);
  }
}

function toggleModelDropdown() {
  const selector = document.getElementById('model-selector');
  const dropdown = document.getElementById('model-dropdown');
  const isOpen = dropdown.style.display !== 'none';
  if (isOpen) {
    dropdown.style.display = 'none';
    selector.classList.remove('open');
  } else {
    dropdown.style.display = 'block';
    selector.classList.add('open');
  }
}

async function switchModel(modelName) {
  try {
    const res = await fetch(`${API}/model/switch`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ model: modelName }),
    });
    const data = await res.json();

    if (data.error) {
      showToast(data.error, 'error');
      return;
    }

    // Update display
    document.getElementById('current-model-label').textContent = data.current;
    document.getElementById('model-dropdown').style.display = 'none';
    document.getElementById('model-selector').classList.remove('open');

    // Refresh dropdown state
    await fetchModels();

    showToast(data.message || `已切换到 ${modelName}`, 'info');
  } catch(e) {
    showToast(`切换失败: ${e.message}`, 'error');
    console.error(e);
  }
}

// Click outside to close dropdown
document.addEventListener('click', (e) => {
  const selector = document.getElementById('model-selector');
  if (selector && !selector.contains(e.target)) {
    document.getElementById('model-dropdown').style.display = 'none';
    selector.classList.remove('open');
  }
});

async function switchThinking(level) {
  try {
    const res = await fetch(`${API}/model/thinking`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ level: level }),
    });
    const data = await res.json();

    if (data.error) {
      showToast(data.error, 'error');
      return;
    }

    // Update button states
    document.querySelectorAll('#thinking-toggle button').forEach(btn => {
      btn.classList.toggle('active', btn.dataset.level === level);
    });

    showToast(data.message || `思考级别已切换为「${level}」`, 'info');
  } catch(e) {
    showToast(`切换失败: ${e.message}`, 'error');
    console.error(e);
  }
}

// ============================================================
// Permission Mode
// ============================================================
const MODES = {
  plan:    { label: '计划模式',   dot: 'plan',    desc: '先生成计划，确认后执行' },
  full:    { label: '完全访问',   dot: 'full',    desc: '无限制自动执行' },
};
let currentMode = 'plan';
let pendingInterruptSession = null;

async function fetchSessionMode() {
  if (!currentSessionId) { currentMode = 'plan'; updateModeUI(); return; }
  try {
    const res = await fetch(`${API}/sessions/${currentSessionId}/mode`, {
      headers: authHeaders(),
    });
    const data = await res.json();
    currentMode = data.mode || 'plan';
    updateModeUI();
    renderModeDropdown();
  } catch(e) { console.error('获取会话模式失败', e); }
}

function updateModeUI() {
  const info = MODES[currentMode] || MODES['plan'];
  document.getElementById('mode-label').textContent = info.label;
  const dot = document.getElementById('mode-dot');
  dot.className = 'mode-dot ' + info.dot;
}

function renderModeDropdown() {
  const dd = document.getElementById('mode-dropdown');
  dd.innerHTML = Object.entries(MODES).map(([k, v]) => {
    const active = k === currentMode;
    return `<div class="mode-option${active ? ' active' : ''}" onclick="switchMode('${k}')">
      <span class="mode-dot ${v.dot}"></span>
      <span class="mode-opt-name">${v.label}</span>
      <span class="mode-opt-desc">${v.desc}</span>
      ${active ? '<span class="mode-opt-check">✓</span>' : ''}
    </div>`;
  }).join('');
}

function toggleModeDropdown() {
  const sel = document.getElementById('mode-selector');
  sel.classList.toggle('open');
  if (sel.classList.contains('open')) renderModeDropdown();
}

async function switchMode(mode) {
  // 无会话时仅更新本地 UI 状态，模式会在首次 /chat 时随请求传入
  if (!currentSessionId) {
    currentMode = mode;
    updateModeUI();
    renderModeDropdown();
    document.getElementById('mode-selector').classList.remove('open');
    return;
  }
  try {
    const res = await fetch(`${API}/sessions/${currentSessionId}/mode`, {
      method: 'PUT',
      headers: authHeaders({ 'Content-Type': 'application/json' }),
      body: JSON.stringify({ mode: mode }),
    });
    const data = await res.json();
    if (data.error) { showToast(data.error, 'error'); return; }
    currentMode = mode;
    updateModeUI();
    renderModeDropdown();
    document.getElementById('mode-selector').classList.remove('open');
    showToast(data.message || `已切换为「${MODES[mode]?.label || mode}」`, 'info');
  } catch(e) { showToast(`切换失败: ${e.message}`, 'error'); }
}

// Close mode dropdown on outside click
document.addEventListener('click', (e) => {
  const sel = document.getElementById('mode-selector');
  if (sel && !sel.contains(e.target)) sel.classList.remove('open');
});

// ── Interrupt handling ──

function showInterruptCard(message, node) {
  const bubble = getOrCreateAssistantMsg();
  // Remove any existing interrupt card
  bubble.querySelectorAll('.interrupt-card').forEach(el => el.remove());

  const card = document.createElement('div');
  card.className = 'interrupt-card';
  const nodeLabel = node === 'tools' ? '工具执行' : '继续执行';
  card.innerHTML = `<span class="interrupt-msg">⚠️ ${message || nodeLabel + '等待审批'}</span>
    <button class="btn-approve" onclick="resumeAfterInterrupt('approve')">✓ 批准</button>
    <button class="btn-reject" onclick="resumeAfterInterrupt('reject')">✕ 拒绝</button>`;
  bubble.appendChild(card);
  scrollToBottom();
}

async function resumeAfterInterrupt(action) {
  if (!pendingInterruptSession) return;
  const sid = pendingInterruptSession;
  pendingInterruptSession = null;

  // Remove interrupt card
  document.querySelectorAll('.interrupt-card').forEach(el => el.remove());

  if (action === 'reject') {
    showToast('已拒绝执行', 'info');
    clearStatus();
    return;
  }

  setStatus('已批准，继续执行...');
  document.getElementById('status-dot').classList.add('streaming');

  try {
    const res = await fetch(`${API}/chat/resume`, {
      method: 'POST',
      headers: authHeaders({ 'Content-Type': 'application/json' }),
      body: JSON.stringify({ session_id: sid, action: 'approve' }),
    });

    if (!res.ok) {
      const errText = await res.text();
      throw new Error(`HTTP ${res.status}: ${errText}`);
    }

    const reader = res.body.getReader();
    const decoder = new TextDecoder();
    let buffer = '';

    while (true) {
      const { done, value } = await reader.read();
      if (done) break;
      buffer += decoder.decode(value, { stream: true });
      const lines = buffer.split('\n');
      buffer = lines.pop() || '';
      for (const line of lines) {
        if (!line.startsWith('data: ')) continue;
        try {
          const event = JSON.parse(line.slice(6));
          handleSSEEvent(event);
        } catch(e) {}
      }
    }
  } catch(e) {
    if (e.name !== 'AbortError') {
      showToast(`恢复执行失败: ${e.message}`, 'error');
    }
  } finally {
    document.getElementById('status-dot').classList.remove('streaming');
    clearStatus();
  }
}

// ============================================================
// Session Management
// ============================================================
async function loadSessions() {
  try {
    const res = await fetch(`${API}/sessions`, { headers: authHeaders() });
    const data = await res.json();
    renderSessionList(data.sessions || []);
  } catch(e) { console.error('加载会话列表失败', e); }
}

function renderSessionList(sessions) {
  const el = document.getElementById('session-list');
  if (!sessions.length) {
    el.innerHTML = '<div style="color:var(--text-muted);font-size:12px;padding:16px;text-align:center">暂无会话</div>';
    return;
  }
  el.innerHTML = sessions.map(s => `
    <div class="session-item ${s.session_id === currentSessionId ? 'active' : ''}"
         onclick="switchSession('${s.session_id}')">
      <span class="title">${escHtml(s.title || s.session_id?.slice(0,8) || '新会话')}</span>
      <span class="count">${s.message_count || 0}</span>
      <button class="btn-pin ${s.sort_order > 0 ? 'pinned' : ''}" onclick="event.stopPropagation();togglePin('${s.session_id}')" title="${s.sort_order > 0 ? '取消置顶' : '置顶'}">📌</button>
      <button class="btn-delete" onclick="event.stopPropagation();deleteSession('${s.session_id}')">×</button>
    </div>
  `).join('');
}

function newSession() {
  abortStream();
  currentSessionId = null;
  localStorage.removeItem('vent_session_id');
  document.getElementById('messages').innerHTML = `
    <div class="empty-state">
      <div class="big-icon">⛏️</div>
      <div>煤矿通风数据智能解读系统</div>
      <div style="font-size:12px">输入问题或上传配风计划 PDF 开始分析</div>
    </div>`;
  document.getElementById('chat-title').textContent = '新会话';
  document.getElementById('status-bar').innerHTML = '';
  document.getElementById('detail-content').innerHTML = '<div style="color:var(--text-muted);font-size:12px;text-align:center;margin-top:40px;">发送消息后<br>此处显示任务进度和工具调用</div>';
  todoItems = [];
  toolLogs = [];
  contextData = null;
  pendingDownloadUrl = null;
  loadSessions();
  currentMode = 'plan';
  updateModeUI();
  renderModeDropdown();
}

async function switchSession(sid) {
  if (sid === currentSessionId) return;
  abortStream();
  currentSessionId = sid;
  localStorage.setItem('vent_session_id', sid);
  document.getElementById('chat-title').textContent = sid.slice(0,8) + '...';
  loadSessions();
  await loadHistory(sid);
  fetchSessionMode();
  fetchContextUsage();
}

async function deleteSession(sid) {
  abortStream();
  await fetch(`${API}/sessions/${sid}`, {
    method: 'DELETE',
    headers: authHeaders(),
  });
  if (currentSessionId === sid) newSession();
  else loadSessions();
}

async function togglePin(sid) {
  try {
    const res = await fetch(`${API}/sessions/${sid}/pin`, {
      method: 'PUT',
      headers: authHeaders({ 'Content-Type': 'application/json' }),
    });
    if (!res.ok) return;
    await loadSessions();
  } catch(e) { /* 静默 */ }
}

// ============================================================
// Session Picker (插入会话)
// ============================================================

function toggleSessionPicker() {
  const picker = document.getElementById('session-picker');
  const btn = document.getElementById('btn-insert-session');
  if (picker.style.display === 'none') {
    picker.style.display = 'flex';
    btn.classList.add('active');
    loadPickerSessions('');
  } else {
    picker.style.display = 'none';
    btn.classList.remove('active');
  }
}

async function loadPickerSessions(keyword) {
  const listEl = document.getElementById('picker-list');
  try {
    const params = keyword ? `?q=${encodeURIComponent(keyword)}` : '';
    const res = await fetch(`${API}/sessions/search${params}`, { headers: authHeaders() });
    const data = await res.json();
    const sessions = data.sessions || [];

    // 过滤掉当前会话
    const filtered = sessions.filter(s => s.session_id !== currentSessionId);

    if (!filtered.length) {
      listEl.innerHTML = '<div class="picker-empty">' + (keyword ? '无匹配会话' : '暂无其他会话') + '</div>';
      return;
    }
    listEl.innerHTML = filtered.map(s => {
      const safeId = s.session_id.replace(/'/g, "\\'");
      const safeTitle = escHtml(s.title || s.session_id.slice(0,8)).replace(/'/g, "&#39;");
      return `
      <div class="picker-item" onclick="selectSession('${safeId}', '${safeTitle}')">
        <span class="picker-title">${escHtml(s.title || s.session_id.slice(0,8))}</span>
        <span class="picker-meta">${s.message_count || 0}条</span>
      </div>`;
    }).join('');
  } catch(e) {
    listEl.innerHTML = '<div class="picker-empty">加载失败</div>';
  }
}

function onPickerSearch(val) {
  clearTimeout(pickerDebounceTimer);
  pickerDebounceTimer = setTimeout(() => loadPickerSessions(val.trim()), 200);
}

function selectSession(id, title) {
  referencedSessionId = id;
  referencedSessionTitle = title;
  // 显示引用 chip
  const chip = document.getElementById('session-ref-chip');
  document.getElementById('chip-title').textContent = title;
  chip.style.display = 'flex';
  // 关闭面板
  document.getElementById('session-picker').style.display = 'none';
  document.getElementById('btn-insert-session').classList.remove('active');
  // 聚焦输入框
  document.getElementById('input').focus();
}

function removeSessionRef() {
  referencedSessionId = null;
  referencedSessionTitle = '';
  document.getElementById('session-ref-chip').style.display = 'none';
  document.getElementById('input').focus();
}

// 点击面板外关闭
document.addEventListener('click', function(e) {
  const picker = document.getElementById('session-picker');
  const btn = document.getElementById('btn-insert-session');
  if (picker.style.display !== 'none' && !picker.contains(e.target) && e.target !== btn) {
    picker.style.display = 'none';
    btn.classList.remove('active');
  }
});

async function loadHistory(sid) {
  try {
    const res = await fetch(`${API}/chat/history/${sid}`, { headers: authHeaders() });
    const data = await res.json();
    const msgsEl = document.getElementById('messages');
    msgsEl.innerHTML = '';
    if (!data.messages || !data.messages.length) {
      msgsEl.innerHTML = '<div class="empty-state"><div class="big-icon">💬</div><div>开始对话吧</div></div>';
      return;
    }
    let lastRole = null;
    data.messages.forEach(m => {
      if (m.role === 'user') {
        addMessage('user', m.content);
        lastRole = 'user';
      } else if (m.role === 'assistant' && m.content) {
        addMessage('assistant', m.content);
        lastRole = 'assistant';
      }
    });
    document.getElementById('chat-title').textContent = data.messages[0]?.content?.slice(0,30) || sid.slice(0,8);
    scrollToBottom();
  } catch(e) { console.error('加载历史失败', e); }
}

// ============================================================
// Message Rendering
// ============================================================
function addMessage(role, content) {
  const msgs = document.getElementById('messages');
  // Remove empty state
  const empty = msgs.querySelector('.empty-state');
  if (empty) empty.remove();

  const div = document.createElement('div');
  div.className = `msg ${role}`;
  div.innerHTML = `
    <div class="role">${role === 'user' ? 'YOU' : 'ASSISTANT'}</div>
    <div class="bubble">${role === 'assistant' ? renderMarkdown(content) : escHtml(content)}</div>`;
  msgs.appendChild(div);
  scrollToBottom();
  return div;
}

function getOrCreateAssistantMsg() {
  const msgs = document.getElementById('messages');
  const empty = msgs.querySelector('.empty-state');
  if (empty) empty.remove();

  // Find last assistant message
  let last = msgs.querySelector('.msg.assistant:last-child');
  if (!last) {
    last = document.createElement('div');
    last.className = 'msg assistant';
    last.innerHTML = '<div class="role">ASSISTANT</div><div class="bubble"></div>';
    msgs.appendChild(last);
    activeThinkBlock = null;
  }
  const bubble = last.querySelector('.bubble');
  // 确保 markdown 文本容器存在（与 Agent 卡片/工具卡片隔离）
  if (!bubble.querySelector('.msg-markdown')) {
    const md = document.createElement('div');
    md.className = 'msg-markdown';
    bubble.appendChild(md);
  }
  return bubble;
}

function appendToken(text) {
  const bubble = getOrCreateAssistantMsg();
  const md = bubble.querySelector('.msg-markdown');

  // 累积原始 markdown 文本
  const existing = md.getAttribute('data-raw') || '';
  md.setAttribute('data-raw', existing + text);

  // 实时追加 token 文本
  const span = document.createElement('span');
  span.textContent = text;
  md.appendChild(span);

  // 每积累约 128 字符时重新渲染（保持表格/标题等格式实时可见）
  const raw = md.getAttribute('data-raw');
  if (raw && raw.length % 128 < text.length) {
    md.innerHTML = renderMarkdown(raw);
    md.setAttribute('data-raw', raw);
  }

  scrollToBottom();
}

function appendThinking(text) {
  const bubble = getOrCreateAssistantMsg();
  if (!activeThinkBlock || !bubble.contains(activeThinkBlock)) {
    activeThinkBlock = document.createElement('details');
    activeThinkBlock.className = 'think-block';
    activeThinkBlock.open = true; // 默认展开
    activeThinkBlock.innerHTML = '<summary><span class="think-icon">💭</span> 思考过程</summary><div class="think-content"></div>';
    // Insert at beginning of bubble, before any existing content
    bubble.insertBefore(activeThinkBlock, bubble.firstChild);
  }
  const content = activeThinkBlock.querySelector('.think-content');
  content.textContent += text;
  // Auto-scroll the think content
  content.scrollTop = content.scrollHeight;
  scrollToBottom();
}

function addToolCard(name, cnName, status, agentCn) {
  const displayName = cnName || name;

  // ── Agent 内工具：翻页动画，仅显示当前正在执行的一个 ──
  if (agentCn && agentCards[agentCn]) {
    const body = agentCards[agentCn].querySelector('.agent-body');
    if (!body) return;

    // 获取或创建翻页容器，始终保持在 body 的最底部
    let flipper = body.querySelector('.tool-flipper');
    if (!flipper) {
      flipper = document.createElement('div');
      flipper.className = 'tool-flipper';
    }
    body.appendChild(flipper);

    // 当前显示的工具元素
    let current = flipper.querySelector('.current-tool');
    if (!current) {
      current = document.createElement('div');
      current.className = 'current-tool';
      current.innerHTML = `<span class="mt-icon spin-icon-sm"></span><span class="mt-name"></span>`;
      flipper.appendChild(current);
    }

    // ── 取消所有进行中的动画，干净重置 ──
    current.getAnimations().forEach(a => a.cancel());
    if (current._fadeTimer) { clearTimeout(current._fadeTimer); current._fadeTimer = null; }
    // 清除动画残留的 inline style（animation fill 可能留下的 transform/opacity）
    current.style.transform = '';
    current.style.opacity = '';

    if (status === 'done') {
      // 工具完成：显示 ✅，1.2s 后翻出消失
      current.className = 'current-tool done';
      const iconEl = current.querySelector('.mt-icon');
      iconEl.className = 'mt-icon';
      iconEl.textContent = '✅';
      current.querySelector('.mt-name').textContent = displayName;
      current._fadeTimer = setTimeout(() => {
        if (current.parentNode) {
          // 取消可能在进行中的动画，然后翻出
          current.getAnimations().forEach(a => a.cancel());
          current.style.transform = '';
          current.style.opacity = '';
          current.className = 'current-tool flip-out';
          current._fadeTimer = null;
        }
      }, 1200);
    } else {
      // 新工具开始：直接翻入替换
      current.className = 'current-tool';
      const iconEl = current.querySelector('.mt-icon');
      iconEl.className = 'mt-icon spin-icon-sm';
      iconEl.textContent = '';
      current.querySelector('.mt-name').textContent = displayName;
      // 强制回流后启动翻入动画
      void current.offsetWidth;
      current.classList.add('flip-in');
    }

    body.scrollTop = body.scrollHeight;
    scrollToBottom();
    toolLogs.push({ name: displayName, status, time: new Date().toLocaleTimeString() });
    updateDetailPanel();
    return;
  }

  // ── 独立工具卡片（无 Agent 上下文，保留列表模式）──
  const bubble = getOrCreateAssistantMsg();
  const card = document.createElement('div');
  card.className = `tool-card ${status}`;
  if (status === 'done') {
    card.innerHTML = `<span class="tool-icon">✅</span>
      <span class="tool-name">${escHtml(displayName)}</span>
      <span class="tool-status">完成</span>`;
  } else {
    card.innerHTML = `<span class="tool-icon spin-icon-sm"></span>
      <span class="tool-name">${escHtml(displayName)}</span>
      <span class="tool-status">执行中...</span>`;
  }
  // 插入到 markdown 之前
  const md = bubble.querySelector('.msg-markdown');
  if (md) { bubble.insertBefore(card, md); }
  else { bubble.appendChild(card); }
  scrollToBottom();
  toolLogs.push({ name: displayName, status, time: new Date().toLocaleTimeString() });
  updateDetailPanel();
}

// ── Agent Card: container for sub-agent tools + progress ──
let agentCards = {};
function addAgentCard(cnName, status, durationMs, progress) {
  const bubble = getOrCreateAssistantMsg();
  const key = cnName;

  if (agentCards[key]) {
    const card = agentCards[key];
    card.className = `agent-card ${status}`;
    const iconEl = card.querySelector('.agent-icon');
    if (status === 'done') {
      iconEl.textContent = '✅';
    } else if (status === 'error') {
      iconEl.textContent = '❌';
    } else {
      iconEl.textContent = '';  // CSS spinner handles the running icon
    }
    const durText = durationMs ? ` (${(durationMs/1000).toFixed(1)}s)` : '';
    const progText = progress ? ` [${progress}]` : '';
    card.querySelector('.agent-status').textContent = status === 'done' ? `完成${durText}${progText}` : '运行中...';
  } else {
    const card = document.createElement('div');
    card.className = `agent-card ${status}`;
    card.innerHTML = `<div class="agent-header">
        <span class="agent-icon"></span>
        <span class="agent-name">${escHtml(cnName)}</span>
        <span class="agent-status">启动...</span>
      </div>
      <div class="agent-body"></div>`;
    // 插入到 markdown 文本容器之前，确保 Agent 卡片在 token 输出上方
    const md = bubble.querySelector('.msg-markdown');
    if (md) {
      bubble.insertBefore(card, md);
    } else {
      bubble.appendChild(card);
    }
    agentCards[key] = card;
  }
  scrollToBottom();
}

// ── Add mini todos inside an agent card ──
function addAgentTodos(agentCn, todos) {
  if (!agentCn || !agentCards[agentCn]) return;
  const body = agentCards[agentCn].querySelector('.agent-body');
  if (!body) return;

  // Remove old mini-todos
  body.querySelectorAll('.mini-todo').forEach(el => el.remove());

  todos.forEach(t => {
    const cls = t.status === 'completed' ? 'completed' : t.status === 'in_progress' ? 'in_progress' : '';
    const mt = document.createElement('div');
    mt.className = `mini-todo ${cls}`;
    mt.innerHTML = `<span class="mt-check"></span><span class="mt-label">${escHtml(t.content || '')}</span>`;
    body.appendChild(mt);
  });
  // 确保工具翻页始终在最底部可见
  const flipper = body.querySelector('.tool-flipper');
  if (flipper) body.appendChild(flipper);
  body.scrollTop = body.scrollHeight;
  scrollToBottom();
}

function addDuration(durationMs, cnAgent) {
  const bubble = getOrCreateAssistantMsg();
  const dur = document.createElement('div');
  dur.className = 'msg-duration';
  const sec = (durationMs / 1000).toFixed(1);
  const agentLabel = cnAgent ? ` · ${cnAgent}` : '';
  dur.innerHTML = `⏱️ ${sec}s${agentLabel}`;
  bubble.appendChild(dur);
}

function updateTodoList(todos) {
  todoItems = todos || [];
  updateDetailPanel();
}

// ── 上下文容量 ──
let contextData = null;

async function fetchContextUsage() {
  if (!currentSessionId) { contextData = null; updateDetailPanel(); return; }
  try {
    const res = await fetch(`${API}/sessions/${currentSessionId}/context`, {
      headers: authHeaders(),
    });
    if (!res.ok) return;
    contextData = await res.json();
    updateDetailPanel();
  } catch(e) { /* 静默 */ }
}

function renderContextMeter() {
  if (!contextData || contextData.total_limit == null) {
    return '<div class="context-meter"><div class="cm-empty">📊 暂无上下文数据<br><span style="font-size:9px">发送消息后自动统计</span></div></div>';
  }

  const pct = contextData.usage_pct || 0;
  const limit = contextData.total_limit;
  const used = contextData.current_usage;
  const bd = contextData.breakdown || {};

  let cls = 'low';
  if (pct > 75) cls = 'crit';
  else if (pct > 50) cls = 'high';
  else if (pct > 25) cls = 'medium';

  const fmt = (n) => n != null ? (n >= 1000 ? (n/1000).toFixed(1)+'K' : n) : '—';

  return `<div class="context-meter">
    <div class="cm-header">
      <span class="cm-label">🧠 上下文容量</span>
      <span class="cm-value">${fmt(used)} / ${fmt(limit)} (${pct}%)</span>
    </div>
    <div class="cm-bar-outer">
      <div class="cm-bar-inner ${cls}" style="width:${Math.min(pct,100)}%"></div>
    </div>
    <div class="cm-breakdown">
      <div class="cm-item"><span class="cm-cat">💬 消息</span><span class="cm-num">${fmt(bd.messages)}</span></div>
      <div class="cm-item"><span class="cm-cat">🔧 系统工具</span><span class="cm-num">${fmt(bd.tools)}</span></div>
      <div class="cm-item"><span class="cm-cat">📋 技能</span><span class="cm-num">${fmt(bd.skills)}</span></div>
      <div class="cm-item"><span class="cm-cat">🔌 MCP</span><span class="cm-num">${fmt(bd.mcp)}</span></div>
      <div class="cm-item"><span class="cm-cat">📝 系统提示</span><span class="cm-num">${fmt(bd.system_prompt)}</span></div>
      <div class="cm-item"><span class="cm-cat">📦 其他</span><span class="cm-num">${fmt(bd.other)}</span></div>
    </div>
  </div>`;
}

function updateDetailPanel() {
  const el = document.getElementById('detail-content');
  let html = '';

  // ── 上下文容量（始终在最上方）──
  html += renderContextMeter();

  if (todoItems.length) {
    html += '<div class="section"><div class="section-title">📝 任务进度</div>';
    todoItems.forEach(t => {
      const cls = t.status === 'completed' ? 'completed' : t.status === 'in_progress' ? 'in_progress' : '';
      html += `<div class="todo-item ${cls}">
        <span class="todo-check"></span>
        <span class="todo-label">${escHtml(t.content || '')}</span>
      </div>`;
    });
    html += '</div>';
  }

  if (toolLogs.length) {
    html += '<div class="section"><div class="section-title">🔧 工具调用</div>';
    toolLogs.slice(-20).reverse().forEach(t => {
      html += `<div class="tool-log-item">
        <span class="tl-icon">${t.status === 'done' ? '✅' : '⏳'}</span>
        <span class="tl-name">${escHtml(t.name)}</span>
      </div>`;
    });
    html += '</div>';
  }

  if (!html) {
    html = '<div style="color:var(--text-muted);font-size:12px;text-align:center;margin-top:40px;">暂无任务数据</div>';
  }

  el.innerHTML = html;
}

function setStatus(text) {
  document.getElementById('status-bar').innerHTML = `
    <span class="spinner"></span><span>${escHtml(text)}</span>`;
}

function clearStatus() {
  document.getElementById('status-bar').innerHTML = '';
}

// ============================================================
// Markdown Rendering (simple built-in, no CDN dependency)
// ============================================================
function renderMarkdown(text) {
  if (!text) return '';
  let html = text;

  // Escape HTML
  html = html.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');

  // Code blocks (```...```)
  html = html.replace(/```(\w*)\n([\s\S]*?)```/g, (_, lang, code) =>
    `<pre><code class="language-${lang}">${code.trim()}</code></pre>`);

  // Inline code (`...`)
  html = html.replace(/`([^`]+)`/g, '<code>$1</code>');

  // Bold (**...**)
  html = html.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');

  // Headers (longest first to avoid partial matches)
  html = html.replace(/^###### (.+)$/gm, '<h6>$1</h6>');
  html = html.replace(/^##### (.+)$/gm, '<h5>$1</h5>');
  html = html.replace(/^#### (.+)$/gm, '<h4>$1</h4>');
  html = html.replace(/^### (.+)$/gm, '<h3>$1</h3>');
  html = html.replace(/^## (.+)$/gm, '<h2>$1</h2>');
  html = html.replace(/^# (.+)$/gm, '<h1>$1</h1>');

  // Blockquote
  html = html.replace(/^&gt; (.+)$/gm, '<blockquote>$1</blockquote>');

  // Unordered lists
  html = html.replace(/^[\-\*] (.+)$/gm, '<li>$1</li>');
  html = html.replace(/(<li>.*<\/li>\n?)+/g, '<ul>$&</ul>');

  // Ordered lists
  html = html.replace(/^\d+\. (.+)$/gm, '<li>$1</li>');

  // Tables
  html = html.replace(/^\|(.+)\|$/gm, (line) => {
    const cells = line.split('|').filter(c => c.trim());
    const isHeader = /^[\-\s:]+$/.test(cells.join(''));
    if (isHeader) return '';
    const tag = line.match(/^\|[\s\-:]+\|$/) ? '' : (line.includes('---') ? '' : '');
    return '<tr>' + cells.map(c => {
      const t = isHeader ? 'th' : 'td';
      return `<${t}>${c.trim()}</${t}>`;
    }).join('') + '</tr>';
  });
  html = html.replace(/(<tr>.*<\/tr>\n?)+/g, '<table>$&</table>');

  // Horizontal rules
  html = html.replace(/^---$/gm, '<hr>');

  // Paragraphs (double newline)
  const parts = html.split(/\n\n+/);
  html = parts.map(p => {
    p = p.trim();
    if (!p) return '';
    if (p.startsWith('<h') || p.startsWith('<pre') || p.startsWith('<table')
        || p.startsWith('<ul') || p.startsWith('<blockquote') || p.startsWith('<hr')) return p;
    return `<p>${p.replace(/\n/g, '<br>')}</p>`;
  }).join('\n');

  return html;
}

// ============================================================
// SSE Streaming
// ============================================================
async function sendMessage() {
  const input = document.getElementById('input');
  const message = input.value.trim();
  const fileInput = document.getElementById('file-input');
  const file = fileInput.files[0];
  if (!message && !file && !referencedSessionId) return;

  // Abort previous stream
  abortStream();

  // Reset state
  todoItems = [];
  toolLogs = [];
  activeThinkBlock = null;
  agentCards = {};
  pendingDownloadUrl = null;
  updateDetailPanel();

  // 构建发送给后端的消息（含会话引用前缀）
  let sendMessage = message || (file ? '请审查这份文件' : '');
  if (referencedSessionId) {
    sendMessage = `#session:${referencedSessionId} ${sendMessage}`.trim();
  }

  // Build FormData
  const fd = new FormData();
  fd.append('message', sendMessage);
  if (currentSessionId) fd.append('session_id', currentSessionId);
  fd.append('mode', currentMode);
  if (file) {
    fd.append('file', file);
    document.getElementById('btn-attach').classList.add('has-file');
  }

  // Add user message to UI
  let displayMsg = message || '';
  if (referencedSessionId) {
    displayMsg = `📋 引用会话「${referencedSessionTitle}」` + (displayMsg ? `\n${displayMsg}` : '');
  }
  if (file) {
    displayMsg = `📎 上传文件: ${file.name}` + (displayMsg ? `\n${displayMsg}` : '');
  }
  if (displayMsg) {
    addMessage('user', displayMsg);
  }

  // Clear input and session reference
  input.value = '';
  fileInput.value = '';
  document.getElementById('btn-attach').classList.remove('has-file');
  removeSessionRef();
  input.style.height = 'auto';

  // UI state
  setStatus('正在分析...');
  document.getElementById('status-dot').classList.add('streaming');
  document.getElementById('btn-send').disabled = true;

  currentAbortController = new AbortController();

  try {
    const res = await fetch(`${API}/chat`, {
      method: 'POST',
      body: fd,
      headers: authHeaders(),
      signal: currentAbortController.signal,
    });

    if (!res.ok) {
      const errText = await res.text();
      throw new Error(`HTTP ${res.status}: ${errText}`);
    }

    // Get session_id from header
    const sid = res.headers.get('X-Session-Id');
    if (sid && sid !== currentSessionId) {
      currentSessionId = sid;
      localStorage.setItem('vent_session_id', sid);
      loadSessions();
      fetchSessionMode();
    }

    // Stream reader
    const reader = res.body.getReader();
    const decoder = new TextDecoder();
    let buffer = '';
    let assistantContent = '';

    while (true) {
      const { done, value } = await reader.read();
      if (done) break;
      buffer += decoder.decode(value, { stream: true });

      // Process complete SSE events
      const lines = buffer.split('\n');
      buffer = lines.pop() || ''; // keep incomplete line in buffer

      for (const line of lines) {
        if (!line.startsWith('data: ')) continue;
        const json = line.slice(6);
        try {
          const event = JSON.parse(json);
          handleSSEEvent(event);
          if (event.type === 'token' && event.content) {
            assistantContent += event.content;
          }
        } catch(e) {
          // Skip malformed JSON
        }
      }
    }

    // Finalize
    if (assistantContent && !currentSessionId) {
      // Session was created server-side
      loadSessions();
    }

  } catch(e) {
    if (e.name !== 'AbortError') {
      showToast(`请求失败: ${e.message}`, 'error');
      console.error(e);
    }
  } finally {
    document.getElementById('status-dot').classList.remove('streaming');
    document.getElementById('btn-send').disabled = false;
    clearStatus();
    currentAbortController = null;
  }
}

function handleSSEEvent(event) {
  switch(event.type) {
    case 'thinking':
    case 'agent_thinking':
      setStatus(event.cn_agent ? `${event.cn_agent}：分析中...` : (event.message || '正在分析...'));
      break;

    case 'thinking_token':
    case 'agent_thinking_token':
      if (event.content) appendThinking(event.content);
      break;

    case 'executing':
    case 'agent_executing':
      {
        const label = event.cn_agent ? `${event.cn_agent}：${event.message}` : event.message;
        setStatus(label || '正在执行工具...');
        if (event.tools && event.tools.length > 0) {
          const cnTools = event.cn_tools || event.tools;
          // 翻页模式：仅展示最后一条（最新执行的工具）
          const lastIdx = event.tools.length - 1;
          addToolCard(event.tools[lastIdx], cnTools[lastIdx], 'pending', event.cn_agent);
        }
      }
      break;

    case 'tool_call':
      addToolCard(event.tool, event.cn_tool, 'pending', event.cn_agent);
      break;

    case 'tool_result':
    case 'agent_tool_result':
      addToolCard(event.tool || '工具', event.cn_tool, 'done', event.cn_agent);
      break;

    case 'token':
      if (event.content) appendToken(event.content);
      break;

    case 'updated_todo_list':
    case 'agent_todos':
      if (event.todos) {
        // If agent context, show mini todos inside agent card
        if (event.cn_agent) {
          addAgentTodos(event.cn_agent, event.todos);
        }
        updateTodoList(event.todos);
      }
      break;

	    case 'progress':
	      setStatus(event.message || '处理中...');
	      if (event.download_url) {
	        pendingDownloadUrl = event.download_url;
	        // Immediately show the download button
	        const bubble = getOrCreateAssistantMsg();
	        // Remove any previous download button
	        bubble.querySelectorAll('.download-btn').forEach(el => el.remove());
	        bubble.appendChild(createDownloadBtn(event.download_url));
	      }
	      break;

    case 'agent_start':
      {
        // 在聊天区显示子智能体启动卡片（体现并行感）
        const cn = event.cn_agent || event.agent;
        addAgentCard(cn, 'running');
        setStatus(`${cn} 启动...`);
      }
      break;

    case 'agent_done':
      {
        const cn = event.cn_agent || event.agent;
        addAgentCard(cn, 'done', event.duration_ms, event.progress);
        setStatus(`✅ ${cn} 完成 (${event.progress || ''})`);
        // Agent 结束 → 无论工具处于什么状态，一律翻出清理
        if (agentCards[cn]) {
          const flipper = agentCards[cn].querySelector('.tool-flipper');
          if (flipper) {
            const ct = flipper.querySelector('.current-tool');
            if (ct) {
              if (ct._fadeTimer) { clearTimeout(ct._fadeTimer); ct._fadeTimer = null; }
              ct.getAnimations().forEach(a => a.cancel());
              ct.style.transform = '';
              ct.style.opacity = '';
              ct.className = 'current-tool flip-out';
            }
          }
        }
      }
      break;

    case 'agent_error':
      showToast(event.message || '子智能体出错', 'error');
      break;

    case 'done':
      clearStatus();
      if (event.duration_ms) {
        addDuration(event.duration_ms, '');
      }
      if (event.download_url) {
        pendingDownloadUrl = event.download_url;
      }
      // 最终渲染 markdown ……
      {
        const bubble = getOrCreateAssistantMsg();
        if (bubble) {
          const md = bubble.querySelector('.msg-markdown');
          if (md) {
            const raw = md.getAttribute('data-raw');
            if (raw) {
              md.innerHTML = renderMarkdown(raw);
              md.removeAttribute('data-raw');
            }
          }
          // 兜底清理：所有 Agent 卡内残留的工具翻页
          bubble.querySelectorAll('.tool-flipper .current-tool').forEach(ct => {
            if (ct._fadeTimer) { clearTimeout(ct._fadeTimer); ct._fadeTimer = null; }
            ct.getAnimations().forEach(a => a.cancel());
            ct.style.transform = '';
            ct.style.opacity = '';
            ct.className = 'current-tool flip-out';
          });
          if (pendingDownloadUrl) {
            bubble.querySelectorAll('.download-btn').forEach(el => el.remove());
            bubble.appendChild(createDownloadBtn(pendingDownloadUrl));
          }
        }
      }
      activeThinkBlock = null;
      loadSessions();
      fetchContextUsage();
      break;

    case 'error':
      showToast(event.message || '出错了', 'error');
      clearStatus();
      break;

    case 'generating':
      setStatus('正在生成报告...');
      break;

    case 'interrupt':
      // LangGraph 中断：需要用户审批
      pendingInterruptSession = currentSessionId;
      showInterruptCard(event.message || '智能体暂停，等待审批...', event.node);
      break;
  }
}

function abortStream() {
  if (currentAbortController) {
    currentAbortController.abort();
    currentAbortController = null;
  }
  document.getElementById('status-dot').classList.remove('streaming');
  document.getElementById('btn-send').disabled = false;
  clearStatus();
}

// ============================================================
// Helpers
// ============================================================
function escHtml(s) {
  if (!s) return '';
  return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
}

function scrollToBottom() {
  requestAnimationFrame(() => {
    const msgs = document.getElementById('messages');
    msgs.scrollTop = msgs.scrollHeight;
  });
}

function onInputKey(e) {
  if (e.key === 'Enter' && !e.shiftKey) {
    e.preventDefault();
    sendMessage();
  }
}

function onFileSelected(input) {
  const btn = document.getElementById('btn-attach');
  if (input.files.length) {
    btn.classList.add('has-file');
    btn.title = input.files[0].name;
  } else {
    btn.classList.remove('has-file');
    btn.title = '上传附件';
  }
}

function showToast(msg, type) {
  const container = document.getElementById('toast-container');
  const el = document.createElement('div');
  el.className = `toast ${type}`;
  el.textContent = msg;
  container.appendChild(el);
  setTimeout(() => { el.remove(); }, 4000);
}

function createDownloadBtn(url) {
  const btn = document.createElement('a');
  btn.className = 'download-btn';
  btn.href = url;
  btn.target = '_blank';
  btn.rel = 'noopener';
  btn.innerHTML = '<span class="dl-icon">📥</span> 下载审查报告 (Word)';
  return btn;
}

// Auto-resize textarea
document.addEventListener('DOMContentLoaded', () => {
  const input = document.getElementById('input');
  input.addEventListener('input', () => {
    input.style.height = 'auto';
    input.style.height = Math.min(input.scrollHeight, 150) + 'px';
  });
});

// ============================================================
// Skill Manager
// ============================================================
async function openSkillManager() {
  document.getElementById('skill-modal').style.display = 'flex';
  await refreshSkillList();
}

function closeSkillModal() {
  document.getElementById('skill-modal').style.display = 'none';
}

// ESC to close
document.addEventListener('keydown', (e) => {
  if (e.key === 'Escape') closeSkillModal();
});

async function refreshSkillList() {
  const body = document.getElementById('skill-modal-body');
  body.innerHTML = '<div style="text-align:center;color:var(--text-muted);padding:40px;">加载中...</div>';

  try {
    const res = await fetch(`${API}/skills`);
    const data = await res.json();
    const skills = data.skills || [];

    if (!skills.length) {
      body.innerHTML = '<div style="text-align:center;color:var(--text-muted);padding:40px;">暂无技能</div>';
      return;
    }

    let html = `<table class="skill-table">
      <thead><tr>
        <th>技能名称</th><th>描述</th><th>所属智能体</th><th>状态</th><th>操作</th>
      </tr></thead><tbody>`;

    skills.forEach(s => {
      const statusCls = s.enabled ? 'enabled' : 'disabled';
      const statusText = s.enabled ? '启用' : '禁用';
      const toggleLabel = s.enabled ? '停用' : '启用';
      html += `<tr>
        <td><span class="skill-name" onclick="viewSkill('${s.name}')">${escHtml(s.display_name || s.name)}</span></td>
        <td class="skill-desc" title="${escHtml(s.description)}">${escHtml(s.description) || '—'}</td>
        <td class="skill-agents">${s.agents.map(a => escHtml(a)).join('<br>')}</td>
        <td><span class="status-badge ${statusCls}">${statusText}</span></td>
        <td>
          <button class="btn-send" onclick="viewSkill('${s.name}')" style="width:auto;padding:3px 10px;font-size:11px;background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);margin-right:4px;">查看</button>
          <button class="btn-send" onclick="toggleSkill('${s.name}')" style="width:auto;padding:3px 10px;font-size:11px;background:var(--bg-surface);border:1px solid var(--border);color:var(--text-secondary);">${toggleLabel}</button>
        </td>
      </tr>`;
    });

    html += '</tbody></table>';

    // Upload zone
    html += `<div class="upload-zone" id="skill-upload-zone" onclick="document.getElementById('skill-upload-input').click()">
      📤 点击上传新技能（.zip 格式）
    </div>`;

    // Detail section
    html += '<div class="skill-detail" id="skill-detail"></div>';

    body.innerHTML = html;
  } catch(e) {
    body.innerHTML = `<div style="text-align:center;color:var(--red);padding:40px;">加载失败: ${escHtml(e.message)}</div>`;
    console.error(e);
  }
}

async function viewSkill(name) {
  const detail = document.getElementById('skill-detail');
  if (!detail) return;

  detail.style.display = 'block';
  detail.innerHTML = '<div style="text-align:center;color:var(--text-muted);padding:20px;">加载中...</div>';

  try {
    const res = await fetch(`${API}/skills/${name}`);
    if (!res.ok) {
      const err = await res.json();
      detail.innerHTML = `<div style="color:var(--red);padding:20px;">${escHtml(err.error || '加载失败')}</div>`;
      return;
    }
    const data = await res.json();

    // Strip YAML frontmatter before rendering
    let content = data.content || '';
    content = content.replace(/^---[\s\S]*?---\n*/, '');

    detail.innerHTML = `<div style="margin-bottom:8px;color:var(--accent);font-weight:600;">📄 ${escHtml(name)} / SKILL.md</div>
      <div>${renderMarkdown(content)}</div>`;
  } catch(e) {
    detail.innerHTML = `<div style="color:var(--red);padding:20px;">加载失败: ${escHtml(e.message)}</div>`;
    console.error(e);
  }
}

async function toggleSkill(name) {
  try {
    const res = await fetch(`${API}/skills/${name}/toggle`, { method: 'POST' });
    const data = await res.json();
    if (data.error) {
      showToast(data.error, 'error');
      return;
    }
    showToast(data.message, 'info');
    await refreshSkillList();
  } catch(e) {
    showToast(`操作失败: ${e.message}`, 'error');
    console.error(e);
  }
}

async function uploadSkill(input) {
  const file = input.files[0];
  if (!file) return;

  const fd = new FormData();
  fd.append('file', file);

  try {
    showToast('正在上传技能...', 'info');
    const res = await fetch(`${API}/skills/upload`, {
      method: 'POST',
      body: fd,
    });
    const data = await res.json();

    if (!res.ok) {
      showToast(data.error || '上传失败', 'error');
      return;
    }

    showToast(data.message, 'info');
    input.value = '';
    await refreshSkillList();
  } catch(e) {
    showToast(`上传失败: ${e.message}`, 'error');
    console.error(e);
  }
}
</script>
</body>
</html>