新增: aichat前端体验四件与队列残留收口

- R4 代码块语言角标:MessageList decorateCodeHtml 捕获 language-xxx 输出 data-lang+CSS ::before 左上角标,hover 显,无语言裸块不渲染
- R6 工具结果路径可复制:ToolResultBody 五处 file-bar 的 path span→button(read_file/list_directory/search_files/grep/patch_file),点击复制完整路径+✓/✕ 1.2s 反馈+execCommand 降级链
- I6 重新生成 UI 入口:MessageItem user 气泡 hover 补重新生成按钮(canRegenerate=isLastUser&&非流式),复用 handleRetry→store.regenerate 链路
- V4 浮窗审批 High 风险二次确认:useToolApproval 导出 isHighRiskTool/highRiskConfirmText,ApprovalPopup.onApprove 前置 ConfirmDialog,数字键守卫不绕确认
- 9-28#5 两处全局清队列残留:useAiEvents/useAiLifecycleEvents 无 convId 的 AiError 分支改保留队列+console.warn(防误伤其他会话排队消息)
- i18n zh/en 补 clickToCopy 键;裸 @ 改 @ 转义(vue-i18n linked-message 前缀吞噬)

src/i18n/en/aiChat.ts

@@ -112,12 +112,12 @@ export default {
     clearSkill: 'Clear skill',
     skillBadgeTip: 'Injected full skill playbook: {name}',
     placeholderWithSkill: 'Skill selected. Type arguments and press Enter',
-    placeholderDefault: "Type a message... (/ for skills, {'@'} to mention)",
+    placeholderDefault: "Type a message... (/ for skills, @ to mention)",
     skillNoMatch: 'No matching skill',
     skillNotLoaded: 'No local skills loaded',
 
     // ── @ entity mention (@ opens popover, select inserts [Type:Name] token) ──
-    mentionHint: "{'@'} to mention project/task",
+    mentionHint: "@ to mention project/task",
     mentionGroupProject: 'Projects',
     mentionGroupTask: 'Tasks',
     mentionGroupIdea: 'Ideas',
@@ -207,7 +207,7 @@ export default {
 
     // ── Input Augmentation layer: mention/skill injection feedback ──
     // search_files blind search denied by whitelist fallback (no auth dialog; prompt user to use @mention or absolute path)
-    searchFilesBlocked: "search_files only works inside authorized dirs. Use {'@'}[project] to reference or provide an absolute path.",
+    searchFilesBlocked: "search_files only works inside authorized dirs. Use @[project] to reference or provide an absolute path.",
     // /skill hot reload (ai_reload_skills IPC) success toast
     skillReloaded: 'Skills reloaded',
     // @mention entity resolve failed (id points to a project/task/idea/skill that was deleted or unavailable)
@@ -288,7 +288,7 @@ export default {
     // ── TopBar goal/project context labels ──
     goalsCount: 'Goals ({n})',
     none: 'None',
-    projectLabel: "{'@'}Projects",
+    projectLabel: "@Projects",
 
     // ── 3c UX batch addition (I5 classified send-failure messages): friendly text by
     //    error kind; {msg} keeps the raw error string for troubleshooting ──

src/i18n/en/aiTool.ts

@@ -15,6 +15,8 @@ export default {
     // tool execution failure marker (AR-6 keeps status=completed, red to distinguish from success)
     executionFailed: 'Failed',
     executionFailedHint: 'Tool execution failed, see details below',
+    // R6: click-to-copy full result path (hover title suffix)
+    clickToCopy: 'Click to copy full path',
     // Singular expand/collapse (ToolCard single-card content, command output toggle)
     expand: 'Expand',
     collapse: 'Collapse',