diff --git a/src/components/AiChat.vue b/src/components/AiChat.vue
index 2e2c8d8..524f706 100644
--- a/src/components/AiChat.vue
+++ b/src/components/AiChat.vue
@@ -607,6 +607,9 @@ async function initContextEventListeners(): Promise<void> {
 </script>
 
 <style scoped>
+/* ═══ AiChat 容器 scoped(God 拆分遗漏修复:侧栏/输入/消息样式已下沉到对应子组件 scoped,
+     复用按钮抽 components.css 全局。本块仅保留 AiChat 自身元素:面板布局/聊天区/input-area
+     容器/agentic 进度/待发队列/toast。子组件元素由各子组件 scoped 负责,父级 scoped 不渗透。) ═══ */
 .ai-panel {
   position: relative; /* 容纳 .ai-toast(absolute,相对面板定位,嵌入/分离模式均生效) */
   display: flex;
@@ -616,309 +619,6 @@ async function initContextEventListeners(): Promise<void> {
   border-left: 0.5px solid var(--df-border);
 }
 
-/* ═══ 对话侧边栏 ═══ */
-/* 宽度由 CSS 变量驱动(UX-2025-16 拖拽)::style 绑 --sidebar-width,不直接绑 width,
-   这样 sidebar-slide 过渡的 width:0(enter-from/leave-to)能正常覆盖,折叠/展开动画不破 */
-.ai-conv-sidebar {
-  position: relative;
-  width: var(--sidebar-width, 200px);
-  min-width: var(--sidebar-width, 200px);
-  border-right: 0.5px solid var(--df-border);
-  display: flex;
-  flex-direction: column;
-  height: 100%;
-  background: var(--df-bg);
-}
-/* UX-2025-16:右边缘 2px 拖拽条。hover/active 显高亮;拖拽中 body.ai-sidebar-resizing 全局锁 cursor 防抖 */
-.ai-sidebar-resize-handle {
-  position: absolute;
-  top: 0;
-  right: -1px; /* 跨过 0.5px border-right,确保命中区不被 border 遮挡 */
-  width: 4px; /* 命中区 4px(视觉 2px 由 background 控制),易抓取 */
-  height: 100%;
-  cursor: col-resize;
-  z-index: 5;
-  background: transparent;
-  transition: background 0.15s var(--df-ease);
-}
-.ai-sidebar-resize-handle:hover {
-  background: var(--df-accent, #4f8cff);
-  opacity: 0.5;
-}
-/* 拖拽中全局锁 cursor + 禁选中文本(挂在 body 上,跨元素生效) */
-body.ai-sidebar-resizing,
-body.ai-sidebar-resizing * {
-  cursor: col-resize !important;
-  user-select: none !important;
-}
-.ai-conv-sidebar-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 10px 10px;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.ai-conv-sidebar-title {
-  font-size: 12px;
-  font-weight: 500;
-  color: var(--df-text);
-}
-
-/* UX-06 §3.1: 对话搜索框(紧贴 header 下,样式跟随周围输入控件) */
-.ai-conv-search {
-  position: relative;
-  display: flex;
-  align-items: center;
-  padding: 6px 10px;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.ai-conv-search-icon {
-  flex: none;
-  color: var(--df-text-dim);
-  margin-right: 6px;
-}
-.ai-conv-search-input {
-  flex: 1;
-  min-width: 0;
-  border: none;
-  outline: none;
-  background: transparent;
-  font-size: 12px;
-  color: var(--df-text);
-}
-.ai-conv-search-input::placeholder {
-  color: var(--df-text-dim);
-}
-.ai-conv-search-kbd {
-  flex: none;
-  font-family: inherit;
-  font-size: 10px;
-  color: var(--df-text-dim);
-  border: 0.5px solid var(--df-border);
-  border-radius: 3px;
-  padding: 0 4px;
-  user-select: none;
-}
-
-.ai-conv-list {
-  flex: 1;
-  overflow-y: auto;
-  padding: 4px;
-}
-.ai-conv-group-title {
-  padding: 8px 8px 3px;
-  font-size: 10px;
-  font-weight: 600;
-  color: var(--df-text-dim);
-  user-select: none;
-}
-.ai-conv-group-title--fold {
-  cursor: pointer;
-  display: flex;
-  align-items: center;
-  gap: 3px;
-}
-.ai-conv-group-title--fold:hover {
-  color: var(--df-text);
-}
-.ai-conv-group-arrow {
-  display: inline-block;
-  transition: transform 0.15s;
-  font-size: 9px;
-}
-.ai-conv-group-arrow.is-folded {
-  transform: rotate(0deg);
-}
-.ai-conv-group-arrow:not(.is-folded) {
-  transform: rotate(90deg);
-}
-.ai-conv-group-count {
-  margin-left: 2px;
-  font-weight: 400;
-  opacity: 0.7;
-}
-.ai-conv-group-empty {
-  padding: 2px 8px 4px 20px;
-  font-size: 10px;
-  color: var(--df-text-dim);
-  font-style: italic;
-}
-.ai-conv-item {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 6px 8px;
-  border-radius: var(--df-radius);
-  cursor: pointer;
-  transition: background 0.15s;
-  gap: 4px;
-}
-.ai-conv-item:hover {
-  background: var(--df-sidebar-hover);
-}
-.ai-conv-item--active {
-  background: var(--df-sidebar-active);
-}
-.ai-conv-item--archived .ai-conv-item-title {
-  opacity: 0.6;
-}
-.ai-conv-item-main {
-  flex: 1;
-  min-width: 0;
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-}
-.ai-conv-item-title {
-  font-size: 11px;
-  color: var(--df-text);
-  white-space: nowrap;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  cursor: pointer;
-  display: inline-flex;
-  align-items: center;
-  gap: 3px;
-  min-width: 0;
-}
-/* UX-2025-20 §7.4: AI 生成标题淡入(0.3s opacity + transform 过渡) */
-.ai-conv-item-title--flash {
-  animation: ai-title-flash 0.3s var(--df-ease);
-}
-.ai-conv-item-title-badge {
-  flex-shrink: 0;
-  color: var(--df-success);
-}
-@keyframes ai-title-flash {
-  from { opacity: 0; transform: translateX(-3px); }
-  to { opacity: 1; transform: translateX(0); }
-}
-.ai-conv-item-edit {
-  font-size: 11px;
-  color: var(--df-text);
-  width: 100%;
-  height: 18px;
-  padding: 0 4px;
-  border: 1px solid var(--df-primary, #4f8cff);
-  border-radius: var(--df-radius-sm);
-  background: var(--df-bg, #fff);
-  outline: none;
-  box-sizing: border-box;
-}
-.ai-conv-item-time {
-  font-size: 9px;
-  color: var(--df-text-dim);
-}
-/* F-09: 多会话并发生成指示器(会话项标题行内脉冲点,多会话可同时显示) */
-.ai-conv-gen-dot {
-  display: inline-block;
-  width: 6px;
-  height: 6px;
-  border-radius: 50%;
-  background: var(--df-primary, #4f8cff);
-  flex-shrink: 0;
-  animation: ai-conv-gen-pulse 1.4s ease-in-out infinite;
-}
-@keyframes ai-conv-gen-pulse {
-  0%, 100% { opacity: 0.35; transform: scale(0.85); }
-  50% { opacity: 1; transform: scale(1.15); }
-}
-.ai-conv-item-actions {
-  display: none;
-  align-items: center;
-  gap: 2px;
-  flex-shrink: 0;
-}
-.ai-conv-item:hover .ai-conv-item-actions {
-  display: flex;
-}
-.ai-conv-item-act {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 18px;
-  height: 18px;
-  border: none;
-  border-radius: var(--df-radius-sm);
-  background: transparent;
-  color: var(--df-text-dim);
-  cursor: pointer;
-  flex-shrink: 0;
-}
-.ai-conv-item-act:hover {
-  background: var(--df-sidebar-hover);
-  color: var(--df-text);
-}
-.ai-conv-item-act:last-child:hover {
-  background: var(--df-danger-bg);
-  color: var(--df-danger);
-}
-/* UX-17: 置顶按钮高亮态(已置顶时常驻强调色,不依赖 hover) */
-.ai-conv-item-act--pinned {
-  color: var(--df-accent, var(--df-text));
-}
-/* CR-22-1: 已置顶对话视觉强调(左边线,不依赖 hover 图钉一眼识别)。
-   原方案「图钉常驻」与 hover 浮出 actions 矛盾(父 display:none 压制子),
-   改用 :has 给已置顶 item 左 accent 边线,hover 浮出操作不变。 */
-.ai-conv-item:has(.ai-conv-item-act--pinned) {
-  box-shadow: inset 2px 0 0 var(--df-accent, var(--df-text));
-}
-/* ── UX-18: 对话导出按钮 + 格式菜单 ──
-   导出按钮位于归档与删除之间(非 last-child,保持删除按钮 :last-child 红色态不被破坏)。
-   菜单绝对定位浮于 item 下方右侧,窄侧栏优先避免溢出。 */
-.ai-conv-item-export {
-  position: relative;
-  display: flex;
-  align-items: center;
-  flex-shrink: 0;
-}
-.ai-conv-export-menu {
-  position: absolute;
-  top: 100%;
-  right: 0;
-  margin-top: 2px;
-  z-index: 20;
-  min-width: 84px;
-  padding: 2px;
-  display: flex;
-  flex-direction: column;
-  gap: 1px;
-  background: var(--df-bg, #fff);
-  border: 1px solid var(--df-border, #e2e2e2);
-  border-radius: var(--df-radius-sm);
-  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
-}
-.ai-conv-export-opt {
-  border: none;
-  background: transparent;
-  text-align: left;
-  padding: 4px 8px;
-  font-size: 11px;
-  color: var(--df-text);
-  cursor: pointer;
-  border-radius: var(--df-radius-sm);
-  white-space: nowrap;
-}
-.ai-conv-export-opt:hover {
-  background: var(--df-sidebar-hover);
-}
-.ai-conv-empty {
-  padding: 16px 8px;
-  text-align: center;
-  font-size: 11px;
-  color: var(--df-text-dim);
-}
-
-/* 侧边栏滑入动画 */
-.sidebar-slide-enter-active { transition: width 0.2s var(--df-ease), opacity 0.15s; }
-.sidebar-slide-leave-active { transition: width 0.15s var(--df-ease), opacity 0.1s; }
-.sidebar-slide-enter-from, .sidebar-slide-leave-to {
-  width: 0;
-  min-width: 0;
-  opacity: 0;
-  overflow: hidden;
-}
-
 /* ═══ 聊天区域 ═══ */
 .ai-chat-area {
   position: relative;
@@ -929,199 +629,9 @@ body.ai-sidebar-resizing * {
   min-width: 0;
 }
 
-/* ═══ Header ═══ */
-.ai-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 10px 14px;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.ai-header-left {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-}
-.ai-header-icon {
-  display: flex;
-  align-items: center;
-  color: var(--df-accent);
-}
-.ai-header-title {
-  font-size: 13px;
-  font-weight: 500;
-  color: var(--df-text);
-}
-/* AE-2025-02:审批徽标(待审批>0 时显于头部,点击跳首个审批卡) */
-.ai-approval-badge {
-  display: inline-flex;
-  align-items: center;
-  cursor: pointer;
-  background: var(--df-warning-bg);
-  color: var(--df-warning);
-  padding: 2px 8px;
-  border-radius: var(--df-radius-sm);
-  font-size: 11px;
-  font-weight: 500;
-  white-space: nowrap;
-  transition: opacity 0.15s var(--df-ease);
-}
-.ai-approval-badge:hover {
-  opacity: 0.85;
-}
-
-/* ═══ F-01 阶段6: 模型选择器(自动/指定 toggle + 下拉) ═══ */
-/* 紧凑内联控件,header 中间区。空池时下拉隐藏 + toggle 禁用,强制自动。 */
-.ai-model-picker {
-  display: flex;
-  align-items: center;
-  gap: 4px;
-  margin-left: auto;
-  margin-right: 4px;
-  padding-left: 8px;
-  min-width: 0;
-}
-.ai-model-mode {
-  display: inline-flex;
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-sm);
-  overflow: hidden;
-  flex-shrink: 0;
-}
-.ai-model-mode-btn {
-  border: none;
-  background: transparent;
-  color: var(--df-text-dim);
-  font-size: 10px;
-  padding: 3px 8px;
-  cursor: pointer;
-  transition: background 0.15s, color 0.15s;
-  white-space: nowrap;
-}
-.ai-model-mode-btn:hover:not(:disabled) {
-  background: var(--df-bg-card);
-  color: var(--df-text);
-}
-.ai-model-mode-btn--active {
-  background: var(--df-accent-bg);
-  color: var(--df-accent);
-}
-.ai-model-mode-btn:disabled {
-  opacity: 0.45;
-  cursor: not-allowed;
-}
-.ai-model-select {
-  min-width: 0;
-  max-width: 180px;
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-sm);
-  background: var(--df-bg);
-  color: var(--df-text);
-  font-size: 10px;
-  font-family: var(--df-font-mono);
-  padding: 3px 6px;
-  outline: none;
-  cursor: pointer;
-}
-.ai-model-select:disabled {
-  opacity: 0.6;
-  cursor: not-allowed;
-}
-.ai-model-empty {
-  font-size: 10px;
-  color: var(--df-text-dim);
-  white-space: nowrap;
-}
-.ai-header-actions {
-  display: flex;
-  gap: 4px;
-}
-.ai-btn-icon {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 26px;
-  height: 26px;
-  border: none;
-  border-radius: var(--df-radius-sm);
-  background: transparent;
-  color: var(--df-text-dim);
-  cursor: pointer;
-  transition: all 0.15s;
-}
-.ai-btn-icon:hover {
-  background: var(--df-bg-card);
-  color: var(--df-text-secondary);
-}
-.ai-btn-icon--active {
-  background: var(--df-accent-bg);
-  color: var(--df-accent);
-}
-
-/* ═══ Provider Bar ═══ */
-.ai-provider-bar {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  padding: 6px 14px;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.ai-provider-bar--switchable {
-  cursor: pointer;
-}
-.ai-provider-bar--switchable:hover {
-  background: var(--df-bg-card);
-}
-.provider-dot {
-  width: 5px;
-  height: 5px;
-  border-radius: 50%;
-  background: var(--df-success);
-}
-.provider-name {
-  font-size: 11px;
-  font-family: var(--df-font-mono);
-  color: var(--df-text-dim);
-}
-.ai-provider-empty {
-  background: var(--df-danger-bg);
-}
-.provider-hint {
-  font-size: 11px;
-  color: var(--df-danger);
-}
-/* UX-2025-14: Provider 切换临时 bar(淡入淡出 0.15s) */
-.ai-provider-switch-bar {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  padding: 4px 14px;
-  background: color-mix(in srgb, var(--df-accent) 12%, transparent);
-  border-bottom: 0.5px solid color-mix(in srgb, var(--df-accent) 25%, transparent);
-  font-size: 11px;
-  color: var(--df-accent);
-  user-select: none;
-}
-.ai-provider-switch-dot {
-  width: 5px;
-  height: 5px;
-  border-radius: 50%;
-  background: var(--df-accent);
-  flex-shrink: 0;
-  animation: ai-agentic-pulse 1s ease-in-out infinite;
-}
-.ai-provider-switch-text {
-  font-family: var(--df-font-mono);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-.ai-provider-switch-enter-active,
-.ai-provider-switch-leave-active { transition: opacity 0.15s var(--df-ease), max-height 0.15s var(--df-ease); }
-.ai-provider-switch-enter-from,
-.ai-provider-switch-leave-to { opacity: 0; max-height: 0; padding-top: 0; padding-bottom: 0; }
-.ai-provider-switch-enter-to,
-.ai-provider-switch-leave-from { opacity: 1; max-height: 32px; }
+/* (Header/Provider Bar/模型选择器/.ai-btn-icon 样式已下沉:
+     TopBar.vue scoped 自持 + .ai-btn-icon* 抽 components.css 全局共享,
+     原 AiChat scoped 不渗透子组件根,删此重复块零视觉变更) */
 
 /* ═══ Input ═══ */
 .ai-input-area {
@@ -1160,71 +670,6 @@ body.ai-sidebar-resizing * {
   0%, 100% { opacity: 1; }
   50% { opacity: 0.3; }
 }
-.ai-input-wrap {
-  position: relative;
-  display: flex;
-  /* F-260614-05 Phase 2b: flex-wrap 让全宽的图片预览行强制 textarea+按钮换行到下一行 */
-  flex-wrap: wrap;
-  align-items: center;
-  gap: 6px;
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius-lg);
-  padding: 6px 8px;
-  transition: border-color 0.15s;
-}
-
-/* F-260614-05 Phase 2b: 待发送图片预览行(粘贴/拖拽加入,发送前可移除) */
-.ai-img-preview-row {
-  display: flex;
-  flex-wrap: wrap;
-  gap: 6px;
-  width: 100%; /* 全宽强制后续 textarea+按钮换行 */
-  padding-bottom: 4px;
-  border-bottom: 0.5px solid var(--df-border);
-}
-.ai-img-preview {
-  position: relative;
-  width: 56px;
-  height: 56px;
-  border-radius: var(--df-radius);
-  overflow: hidden;
-  border: 0.5px solid var(--df-border);
-  background: var(--df-bg);
-}
-.ai-img-preview-thumb {
-  width: 100%;
-  height: 100%;
-  object-fit: cover;
-  display: block;
-}
-.ai-img-preview-x {
-  position: absolute;
-  top: 2px;
-  right: 2px;
-  width: 16px;
-  height: 16px;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border: none;
-  border-radius: 50%;
-  background: color-mix(in srgb, var(--df-bg) 80%, transparent);
-  color: var(--df-text-dim);
-  font-size: 14px;
-  line-height: 1;
-  cursor: pointer;
-  padding: 0;
-  transition: background 0.15s, color 0.15s;
-}
-.ai-img-preview-x:hover {
-  background: var(--df-danger);
-  color: #fff;
-}
-
-.ai-input-wrap:focus-within {
-  border-color: color-mix(in srgb, var(--df-accent) 40%, transparent);
-}
 
 /* ── 待发送队列 ── */
 .ai-queue {
@@ -1289,187 +734,7 @@ body.ai-sidebar-resizing * {
   outline: none;
 }
 
-/* ── 技能 chip / 联想浮层 ── */
-.ai-skill-chip {
-  display: flex;
-  align-items: center;
-  gap: 6px;
-  margin-bottom: 6px;
-  padding: 3px 8px;
-  background: color-mix(in srgb, var(--df-accent) 16%, transparent);
-  border: 0.5px solid color-mix(in srgb, var(--df-accent) 40%, transparent);
-  border-radius: var(--df-radius);
-  font-size: 12px;
-}
-.ai-skill-chip-name { color: var(--df-accent); font-weight: 600; flex-shrink: 0; }
-.ai-skill-chip-desc { color: var(--df-text-dim); flex-shrink: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-/* 参数格式提示(技能自带 argument_hint 数据,不进 i18n) */
-.ai-skill-chip-main { display: flex; align-items: center; gap: 6px; flex: 1; min-width: 0; flex-wrap: wrap; }
-.ai-skill-chip-hint {
-  color: var(--df-text-dim);
-  font-family: var(--df-font-mono, ui-monospace, monospace);
-  font-size: 11px;
-  background: color-mix(in srgb, var(--df-text-dim) 14%, transparent);
-  padding: 1px 5px;
-  border-radius: 3px;
-}
-.ai-skill-chip-x { background: none; border: none; color: var(--df-text-dim); cursor: pointer; font-size: 14px; line-height: 1; padding: 0 2px; flex-shrink: 0; }
-.ai-skill-chip-x:hover { color: var(--df-text); }
-
-.ai-skill-popover {
-  position: absolute;
-  bottom: calc(100% + 4px);
-  left: 0;
-  right: 0;
-  max-height: 240px;
-  overflow-y: auto;
-  background: var(--df-bg-card);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius);
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
-  z-index: 20;
-}
-.ai-skill-item {
-  display: flex;
-  flex-direction: column;
-  gap: 2px;
-  padding: 6px 10px;
-  cursor: pointer;
-  font-size: 12px;
-}
-.ai-skill-item-row { display: flex; align-items: center; gap: 8px; min-width: 0; }
-.ai-skill-item--active,
-.ai-skill-item:hover {
-  background: color-mix(in srgb, var(--df-accent) 14%, transparent);
-}
-.ai-skill-item-name { color: var(--df-accent); font-weight: 600; min-width: 90px; }
-.ai-skill-item-desc { color: var(--df-text-dim); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
-.ai-skill-item-src { color: var(--df-text-dim); opacity: 0.6; font-size: 10px; text-transform: uppercase; }
-/* 浮层内参数格式提示(等宽 dim 小字,仅在 skill.argument_hint 有值时显) */
-.ai-skill-item-hint {
-  color: var(--df-text-dim);
-  font-family: var(--df-font-mono, ui-monospace, monospace);
-  font-size: 11px;
-  opacity: 0.85;
-  word-break: break-all;
-}
-.ai-skill-empty { padding: 8px 12px; color: var(--df-text-dim); opacity: 0.7; font-size: 12px; }
-
-/* ── UX-10 §1.4: @ 实体引用浮层(复用 .ai-skill-popover 容器,仅新增组标题/类型标签) ── */
-.ai-mention-popover { /* 同 .ai-skill-popover 定位,这里仅为语义占位,样式继承 */ }
-.ai-mention-group {
-  padding: 4px 10px 2px;
-  font-size: 10px;
-  font-weight: 600;
-  color: var(--df-text-dim);
-  text-transform: uppercase;
-  letter-spacing: 0.5px;
-  user-select: none;
-}
-.ai-mention-item-name { color: var(--df-text); font-weight: 500; flex-shrink: 0; }
-.ai-mention-item-desc {
-  color: var(--df-text-dim);
-  flex: 1;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-/* 类型标签小色块(项目/任务区分) */
-.ai-mention-item-type {
-  flex-shrink: 0;
-  padding: 1px 5px;
-  border-radius: var(--df-radius-sm);
-  font-size: 9px;
-  font-weight: 600;
-  letter-spacing: 0.3px;
-  background: var(--df-bg-hover);
-  color: var(--df-text-dim);
-}
-.ai-mention-item-type--project {
-  background: color-mix(in srgb, var(--df-accent) 16%, transparent);
-  color: var(--df-accent);
-}
-.ai-mention-item-type--task {
-  background: color-mix(in srgb, var(--df-success) 16%, transparent);
-  color: var(--df-success);
-}
-
-.ai-input {
-  flex: 1;
-  background: transparent;
-  border: none;
-  outline: none;
-  color: var(--df-text);
-  font-size: 13px;
-  font-family: var(--df-font-sans);
-  line-height: 1.5;
-  resize: vertical;
-  min-height: 20px;
-  height: 20px;
-  max-height: 200px;
-  overflow-y: auto;
-}
-.ai-input::placeholder {
-  color: var(--df-text-dim);
-}
-.ai-send-btn {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 28px;
-  height: 28px;
-  border: none;
-  border-radius: var(--df-radius);
-  background: var(--df-bg-raised);
-  color: var(--df-text-dim);
-  cursor: pointer;
-  transition: all 0.15s;
-  flex-shrink: 0;
-}
-.ai-send-btn--active {
-  background: var(--df-accent);
-  color: #fff;
-}
-.ai-send-btn--active:hover {
-  background: var(--df-accent-hover);
-}
-.ai-send-btn:disabled {
-  opacity: 0.4;
-  cursor: not-allowed;
-}
-.ai-send-btn--stop {
-  background: #e5484d;
-  color: #fff;
-}
-.ai-send-btn--stop:hover {
-  background: #d63a3f;
-}
-.ai-input-hint {
-  font-size: 10px;
-  color: var(--df-text-dim);
-  text-align: right;
-  margin-top: 4px;
-  opacity: 0.6;
-}
-
-/* ── F-15 阶段2: 按钮禁用态(清空/压缩上下文,空会话/全归档/生成中)──
-   复用现有 .ai-btn-icon:hover 风格,禁用时降透明度 + not-allowed,不发 hover 高亮。 */
-.ai-btn-icon:disabled {
-  opacity: 0.35;
-  cursor: not-allowed;
-}
-.ai-btn-icon:disabled:hover {
-  background: transparent;
-  color: var(--df-text-dim);
-}
-/* 压缩中 spinner 图标旋转动画 */
-.ai-btn-spinner {
-  animation: ai-btn-spin 0.9s linear infinite;
-}
-@keyframes ai-btn-spin {
-  from { transform: rotate(0deg); }
-  to { transform: rotate(360deg); }
-}
+/* (.ai-btn-icon:disabled / .ai-btn-spinner / @keyframes ai-btn-spin 已抽 components.css 全局共享) */
 
 /* ═══ 错误 toast(复用 Settings.vue .toast 样式,前缀 ai- 防 scoped 冲突) ═══ */
 .ai-toast {
diff --git a/src/components/ai/ChatInput.vue b/src/components/ai/ChatInput.vue
index 9e779e1..7e5ca8a 100644
--- a/src/components/ai/ChatInput.vue
+++ b/src/components/ai/ChatInput.vue
@@ -656,3 +656,237 @@ defineExpose({
   sendExamplePrompt,
 })
 </script>
+
+<!-- ═══ ChatInput scoped 样式(第二批抽离遗漏修复: 从 AiChat.vue <style scoped> 迁移,
+     零视觉变更。原 AiChat scoped 不渗透子组件根,输入框/技能联想/发送按钮元素失配 → 本组件自持。
+     CSS 变量(--df-*)由根级 global.css 提供,共享同一份。.ai-input-area 容器留父级 AiChat scoped。) ═══ -->
+<style scoped>
+.ai-input-wrap {
+  position: relative;
+  display: flex;
+  /* F-260614-05 Phase 2b: flex-wrap 让全宽的图片预览行强制 textarea+按钮换行到下一行 */
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 6px;
+  background: var(--df-bg-card);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius-lg);
+  padding: 6px 8px;
+  transition: border-color 0.15s;
+}
+
+/* F-260614-05 Phase 2b: 待发送图片预览行(粘贴/拖拽加入,发送前可移除) */
+.ai-img-preview-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  width: 100%; /* 全宽强制后续 textarea+按钮换行 */
+  padding-bottom: 4px;
+  border-bottom: 0.5px solid var(--df-border);
+}
+.ai-img-preview {
+  position: relative;
+  width: 56px;
+  height: 56px;
+  border-radius: var(--df-radius);
+  overflow: hidden;
+  border: 0.5px solid var(--df-border);
+  background: var(--df-bg);
+}
+.ai-img-preview-thumb {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+}
+.ai-img-preview-x {
+  position: absolute;
+  top: 2px;
+  right: 2px;
+  width: 16px;
+  height: 16px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border: none;
+  border-radius: 50%;
+  background: color-mix(in srgb, var(--df-bg) 80%, transparent);
+  color: var(--df-text-dim);
+  font-size: 14px;
+  line-height: 1;
+  cursor: pointer;
+  padding: 0;
+  transition: background 0.15s, color 0.15s;
+}
+.ai-img-preview-x:hover {
+  background: var(--df-danger);
+  color: #fff;
+}
+
+.ai-input-wrap:focus-within {
+  border-color: color-mix(in srgb, var(--df-accent) 40%, transparent);
+}
+
+/* ── 技能 chip / 联想浮层 ── */
+.ai-skill-chip {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  margin-bottom: 6px;
+  padding: 3px 8px;
+  background: color-mix(in srgb, var(--df-accent) 16%, transparent);
+  border: 0.5px solid color-mix(in srgb, var(--df-accent) 40%, transparent);
+  border-radius: var(--df-radius);
+  font-size: 12px;
+}
+.ai-skill-chip-name { color: var(--df-accent); font-weight: 600; flex-shrink: 0; }
+.ai-skill-chip-desc { color: var(--df-text-dim); flex-shrink: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+/* 参数格式提示(技能自带 argument_hint 数据,不进 i18n) */
+.ai-skill-chip-main { display: flex; align-items: center; gap: 6px; flex: 1; min-width: 0; flex-wrap: wrap; }
+.ai-skill-chip-hint {
+  color: var(--df-text-dim);
+  font-family: var(--df-font-mono, ui-monospace, monospace);
+  font-size: 11px;
+  background: color-mix(in srgb, var(--df-text-dim) 14%, transparent);
+  padding: 1px 5px;
+  border-radius: 3px;
+}
+.ai-skill-chip-x { background: none; border: none; color: var(--df-text-dim); cursor: pointer; font-size: 14px; line-height: 1; padding: 0 2px; flex-shrink: 0; }
+.ai-skill-chip-x:hover { color: var(--df-text); }
+
+.ai-skill-popover {
+  position: absolute;
+  bottom: calc(100% + 4px);
+  left: 0;
+  right: 0;
+  max-height: 240px;
+  overflow-y: auto;
+  background: var(--df-bg-card);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius);
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
+  z-index: 20;
+}
+.ai-skill-item {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  padding: 6px 10px;
+  cursor: pointer;
+  font-size: 12px;
+}
+.ai-skill-item-row { display: flex; align-items: center; gap: 8px; min-width: 0; }
+.ai-skill-item--active,
+.ai-skill-item:hover {
+  background: color-mix(in srgb, var(--df-accent) 14%, transparent);
+}
+.ai-skill-item-name { color: var(--df-accent); font-weight: 600; min-width: 90px; }
+.ai-skill-item-desc { color: var(--df-text-dim); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.ai-skill-item-src { color: var(--df-text-dim); opacity: 0.6; font-size: 10px; text-transform: uppercase; }
+/* 浮层内参数格式提示(等宽 dim 小字,仅在 skill.argument_hint 有值时显) */
+.ai-skill-item-hint {
+  color: var(--df-text-dim);
+  font-family: var(--df-font-mono, ui-monospace, monospace);
+  font-size: 11px;
+  opacity: 0.85;
+  word-break: break-all;
+}
+.ai-skill-empty { padding: 8px 12px; color: var(--df-text-dim); opacity: 0.7; font-size: 12px; }
+
+/* ── UX-10 §1.4: @ 实体引用浮层(复用 .ai-skill-popover 容器,仅新增组标题/类型标签) ── */
+.ai-mention-popover { /* 同 .ai-skill-popover 定位,这里仅为语义占位,样式继承 */ }
+.ai-mention-group {
+  padding: 4px 10px 2px;
+  font-size: 10px;
+  font-weight: 600;
+  color: var(--df-text-dim);
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  user-select: none;
+}
+.ai-mention-item-name { color: var(--df-text); font-weight: 500; flex-shrink: 0; }
+.ai-mention-item-desc {
+  color: var(--df-text-dim);
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+/* 类型标签小色块(项目/任务区分) */
+.ai-mention-item-type {
+  flex-shrink: 0;
+  padding: 1px 5px;
+  border-radius: var(--df-radius-sm);
+  font-size: 9px;
+  font-weight: 600;
+  letter-spacing: 0.3px;
+  background: var(--df-bg-hover);
+  color: var(--df-text-dim);
+}
+.ai-mention-item-type--project {
+  background: color-mix(in srgb, var(--df-accent) 16%, transparent);
+  color: var(--df-accent);
+}
+.ai-mention-item-type--task {
+  background: color-mix(in srgb, var(--df-success) 16%, transparent);
+  color: var(--df-success);
+}
+
+.ai-input {
+  flex: 1;
+  background: transparent;
+  border: none;
+  outline: none;
+  color: var(--df-text);
+  font-size: 13px;
+  font-family: var(--df-font-sans);
+  line-height: 1.5;
+  resize: vertical;
+  min-height: 20px;
+  height: 20px;
+  max-height: 200px;
+  overflow-y: auto;
+}
+.ai-input::placeholder {
+  color: var(--df-text-dim);
+}
+.ai-send-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border: none;
+  border-radius: var(--df-radius);
+  background: var(--df-bg-raised);
+  color: var(--df-text-dim);
+  cursor: pointer;
+  transition: all 0.15s;
+  flex-shrink: 0;
+}
+.ai-send-btn--active {
+  background: var(--df-accent);
+  color: #fff;
+}
+.ai-send-btn--active:hover {
+  background: var(--df-accent-hover);
+}
+.ai-send-btn:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+.ai-send-btn--stop {
+  background: #e5484d;
+  color: #fff;
+}
+.ai-send-btn--stop:hover {
+  background: #d63a3f;
+}
+.ai-input-hint {
+  font-size: 10px;
+  color: var(--df-text-dim);
+  text-align: right;
+  margin-top: 4px;
+  opacity: 0.6;
+}
+</style>
diff --git a/src/components/ai/ConversationSidebar.vue b/src/components/ai/ConversationSidebar.vue
index e7bb83c..d8b546d 100644
--- a/src/components/ai/ConversationSidebar.vue
+++ b/src/components/ai/ConversationSidebar.vue
@@ -463,3 +463,311 @@ defineExpose({
   focusSearch,
 })
 </script>
+
+<!-- ═══ ConversationSidebar scoped 样式(第一批抽离遗漏修复: 从 AiChat.vue <style scoped> 迁移,
+     零视觉变更。原 AiChat scoped 不渗透子组件根,导致侧栏元素失配 → 本组件自持样式。
+     CSS 变量(--df-*)由根级 global.css 提供,共享同一份。.ai-btn-icon 共享按钮抽 components.css 全局。) ═══ -->
+<style scoped>
+/* ═══ 对话侧边栏 ═══ */
+/* 宽度由 CSS 变量驱动(UX-2025-16 拖拽)::style 绑 --sidebar-width,不直接绑 width,
+   这样 sidebar-slide 过渡的 width:0(enter-from/leave-to)能正常覆盖,折叠/展开动画不破 */
+.ai-conv-sidebar {
+  position: relative;
+  width: var(--sidebar-width, 200px);
+  min-width: var(--sidebar-width, 200px);
+  border-right: 0.5px solid var(--df-border);
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  background: var(--df-bg);
+}
+/* UX-2025-16:右边缘 2px 拖拽条。hover/active 显高亮;拖拽中 body.ai-sidebar-resizing 全局锁 cursor 防抖 */
+.ai-sidebar-resize-handle {
+  position: absolute;
+  top: 0;
+  right: -1px; /* 跨过 0.5px border-right,确保命中区不被 border 遮挡 */
+  width: 4px; /* 命中区 4px(视觉 2px 由 background 控制),易抓取 */
+  height: 100%;
+  cursor: col-resize;
+  z-index: 5;
+  background: transparent;
+  transition: background 0.15s var(--df-ease);
+}
+.ai-sidebar-resize-handle:hover {
+  background: var(--df-accent, #4f8cff);
+  opacity: 0.5;
+}
+/* 拖拽中全局锁 cursor + 禁选中文本(挂在 body 上,跨元素生效) */
+body.ai-sidebar-resizing,
+body.ai-sidebar-resizing * {
+  cursor: col-resize !important;
+  user-select: none !important;
+}
+.ai-conv-sidebar-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 10px 10px;
+  border-bottom: 0.5px solid var(--df-border);
+}
+.ai-conv-sidebar-title {
+  font-size: 12px;
+  font-weight: 500;
+  color: var(--df-text);
+}
+
+/* UX-06 §3.1: 对话搜索框(紧贴 header 下,样式跟随周围输入控件) */
+.ai-conv-search {
+  position: relative;
+  display: flex;
+  align-items: center;
+  padding: 6px 10px;
+  border-bottom: 0.5px solid var(--df-border);
+}
+.ai-conv-search-icon {
+  flex: none;
+  color: var(--df-text-dim);
+  margin-right: 6px;
+}
+.ai-conv-search-input {
+  flex: 1;
+  min-width: 0;
+  border: none;
+  outline: none;
+  background: transparent;
+  font-size: 12px;
+  color: var(--df-text);
+}
+.ai-conv-search-input::placeholder {
+  color: var(--df-text-dim);
+}
+.ai-conv-search-kbd {
+  flex: none;
+  font-family: inherit;
+  font-size: 10px;
+  color: var(--df-text-dim);
+  border: 0.5px solid var(--df-border);
+  border-radius: 3px;
+  padding: 0 4px;
+  user-select: none;
+}
+
+.ai-conv-list {
+  flex: 1;
+  overflow-y: auto;
+  padding: 4px;
+}
+.ai-conv-group-title {
+  padding: 8px 8px 3px;
+  font-size: 10px;
+  font-weight: 600;
+  color: var(--df-text-dim);
+  user-select: none;
+}
+.ai-conv-group-title--fold {
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  gap: 3px;
+}
+.ai-conv-group-title--fold:hover {
+  color: var(--df-text);
+}
+.ai-conv-group-arrow {
+  display: inline-block;
+  transition: transform 0.15s;
+  font-size: 9px;
+}
+.ai-conv-group-arrow.is-folded {
+  transform: rotate(0deg);
+}
+.ai-conv-group-arrow:not(.is-folded) {
+  transform: rotate(90deg);
+}
+.ai-conv-group-count {
+  margin-left: 2px;
+  font-weight: 400;
+  opacity: 0.7;
+}
+.ai-conv-group-empty {
+  padding: 2px 8px 4px 20px;
+  font-size: 10px;
+  color: var(--df-text-dim);
+  font-style: italic;
+}
+.ai-conv-item {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 6px 8px;
+  border-radius: var(--df-radius);
+  cursor: pointer;
+  transition: background 0.15s;
+  gap: 4px;
+}
+.ai-conv-item:hover {
+  background: var(--df-sidebar-hover);
+}
+.ai-conv-item--active {
+  background: var(--df-sidebar-active);
+}
+.ai-conv-item--archived .ai-conv-item-title {
+  opacity: 0.6;
+}
+.ai-conv-item-main {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+.ai-conv-item-title {
+  font-size: 11px;
+  color: var(--df-text);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  cursor: pointer;
+  display: inline-flex;
+  align-items: center;
+  gap: 3px;
+  min-width: 0;
+}
+/* UX-2025-20 §7.4: AI 生成标题淡入(0.3s opacity + transform 过渡) */
+.ai-conv-item-title--flash {
+  animation: ai-title-flash 0.3s var(--df-ease);
+}
+.ai-conv-item-title-badge {
+  flex-shrink: 0;
+  color: var(--df-success);
+}
+@keyframes ai-title-flash {
+  from { opacity: 0; transform: translateX(-3px); }
+  to { opacity: 1; transform: translateX(0); }
+}
+.ai-conv-item-edit {
+  font-size: 11px;
+  color: var(--df-text);
+  width: 100%;
+  height: 18px;
+  padding: 0 4px;
+  border: 1px solid var(--df-primary, #4f8cff);
+  border-radius: var(--df-radius-sm);
+  background: var(--df-bg, #fff);
+  outline: none;
+  box-sizing: border-box;
+}
+.ai-conv-item-time {
+  font-size: 9px;
+  color: var(--df-text-dim);
+}
+/* F-09: 多会话并发生成指示器(会话项标题行内脉冲点,多会话可同时显示) */
+.ai-conv-gen-dot {
+  display: inline-block;
+  width: 6px;
+  height: 6px;
+  border-radius: 50%;
+  background: var(--df-primary, #4f8cff);
+  flex-shrink: 0;
+  animation: ai-conv-gen-pulse 1.4s ease-in-out infinite;
+}
+@keyframes ai-conv-gen-pulse {
+  0%, 100% { opacity: 0.35; transform: scale(0.85); }
+  50% { opacity: 1; transform: scale(1.15); }
+}
+.ai-conv-item-actions {
+  display: none;
+  align-items: center;
+  gap: 2px;
+  flex-shrink: 0;
+}
+.ai-conv-item:hover .ai-conv-item-actions {
+  display: flex;
+}
+.ai-conv-item-act {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 18px;
+  height: 18px;
+  border: none;
+  border-radius: var(--df-radius-sm);
+  background: transparent;
+  color: var(--df-text-dim);
+  cursor: pointer;
+  flex-shrink: 0;
+}
+.ai-conv-item-act:hover {
+  background: var(--df-sidebar-hover);
+  color: var(--df-text);
+}
+.ai-conv-item-act:last-child:hover {
+  background: var(--df-danger-bg);
+  color: var(--df-danger);
+}
+/* UX-17: 置顶按钮高亮态(已置顶时常驻强调色,不依赖 hover) */
+.ai-conv-item-act--pinned {
+  color: var(--df-accent, var(--df-text));
+}
+/* CR-22-1: 已置顶对话视觉强调(左边线,不依赖 hover 图钉一眼识别)。
+   原方案「图钉常驻」与 hover 浮出 actions 矛盾(父 display:none 压制子),
+   改用 :has 给已置顶 item 左 accent 边线,hover 浮出操作不变。 */
+.ai-conv-item:has(.ai-conv-item-act--pinned) {
+  box-shadow: inset 2px 0 0 var(--df-accent, var(--df-text));
+}
+/* ── UX-18: 对话导出按钮 + 格式菜单 ──
+   导出按钮位于归档与删除之间(非 last-child,保持删除按钮 :last-child 红色态不被破坏)。
+   菜单绝对定位浮于 item 下方右侧,窄侧栏优先避免溢出。 */
+.ai-conv-item-export {
+  position: relative;
+  display: flex;
+  align-items: center;
+  flex-shrink: 0;
+}
+.ai-conv-export-menu {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  margin-top: 2px;
+  z-index: 20;
+  min-width: 84px;
+  padding: 2px;
+  display: flex;
+  flex-direction: column;
+  gap: 1px;
+  background: var(--df-bg, #fff);
+  border: 1px solid var(--df-border, #e2e2e2);
+  border-radius: var(--df-radius-sm);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
+}
+.ai-conv-export-opt {
+  border: none;
+  background: transparent;
+  text-align: left;
+  padding: 4px 8px;
+  font-size: 11px;
+  color: var(--df-text);
+  cursor: pointer;
+  border-radius: var(--df-radius-sm);
+  white-space: nowrap;
+}
+.ai-conv-export-opt:hover {
+  background: var(--df-sidebar-hover);
+}
+.ai-conv-empty {
+  padding: 16px 8px;
+  text-align: center;
+  font-size: 11px;
+  color: var(--df-text-dim);
+}
+
+/* 侧边栏滑入动画 */
+.sidebar-slide-enter-active { transition: width 0.2s var(--df-ease), opacity 0.15s; }
+.sidebar-slide-leave-active { transition: width 0.15s var(--df-ease), opacity 0.1s; }
+.sidebar-slide-enter-from, .sidebar-slide-leave-to {
+  width: 0;
+  min-width: 0;
+  opacity: 0;
+  overflow: hidden;
+}
+</style>
diff --git a/src/styles/components.css b/src/styles/components.css
index f71cb63..4bf1f2c 100644
--- a/src/styles/components.css
+++ b/src/styles/components.css
@@ -77,3 +77,50 @@
   color: var(--df-text-secondary);
   border: 0.5px solid var(--df-border);
 }
+
+/* — AiChat 图标按钮(共享工具类):TopBar header-actions + ConversationSidebar 新建按钮 —
+   原 AiChat.vue <style scoped> L1039-1072 抽取(非 scoped 全局,供两个 ai/ 子组件共享)。
+   复用原因:跨 TopBar + ConversationSidebar,无法归属单一 scoped;
+   原 AiChat scoped(拆分前)不渗透子组件根,ConversationSidebar 拿不到 → 抽全局。
+   TopBar.vue 内仍有 scoped 副本(第三批抽离时复制),与本全局块逐字一致,无视觉冲突。 */
+.ai-btn-icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 26px;
+  height: 26px;
+  border: none;
+  border-radius: var(--df-radius-sm);
+  background: transparent;
+  color: var(--df-text-dim);
+  cursor: pointer;
+  transition: all 0.15s;
+}
+.ai-btn-icon:hover {
+  background: var(--df-bg-card);
+  color: var(--df-text-secondary);
+}
+.ai-btn-icon--active {
+  background: var(--df-accent-bg);
+  color: var(--df-accent);
+}
+/* ── F-15 阶段2: 按钮禁用态(清空/压缩上下文,空会话/全归档/生成中)──
+   复用现有 .ai-btn-icon:hover 风格,禁用时降透明度 + not-allowed,不发 hover 高亮。 */
+.ai-btn-icon:disabled {
+  opacity: 0.35;
+  cursor: not-allowed;
+}
+.ai-btn-icon:disabled:hover {
+  background: transparent;
+  color: var(--df-text-dim);
+}
+/* 压缩中 spinner 图标旋转动画(原 AiChat.vue <style scoped> 抽取;
+   TopBar.vue .ai-btn-spinner 按名引用,Vue 不对 @keyframes scoped 故全局可见) */
+.ai-btn-spinner {
+  animation: ai-btn-spin 0.9s linear infinite;
+}
+@keyframes ai-btn-spin {
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+}
+