fix(web): code review round 1 remaining UI fixes

- EmojiPanel: add missing 手势/物品 categories, 12-column grid per README §3.3
- DetailColumn: add 投诉举报 row, real ID/region/签名 via new getUserProfile
  API, chevron_right icons now use --color-icon-arrow token (were tertiary
  text color), regroup rows so dividers only sit between sections not every
  row (matches design-code reference exactly)
- MessageBubble/ConversationView: right-clicked message bubble now gets the
  spec's outline while its context menu is open
- ChatListColumn/AppShell: pinned 系统消息/文件助手 rows using confirmed
  bootstrap entries/entry_badges topic names ("sys"/"slf"); route to the
  existing SectionPlaceholder pattern since their own dedicated layouts are
  Phase 8, not built yet

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/src/lib/api/bootstrap.ts

@@ -13,10 +13,34 @@ export interface RealnameStatus {
   status: 'unverified' | 'pending' | 'verified' | string;
 }
 
+/** README §2.1's "固定置顶两项" -- topic names are fixed/well-known on this backend (confirmed:
+ *  docs/IM-前后端对接文档.md:909, `file_assistant.topic:"slf"`, `system_messages.topic:"sys"`), not
+ *  per-user values the client has to discover another way. */
+export interface BootstrapEntry {
+  enabled: boolean;
+  route: string;
+  topic?: string;
+  unread_count: number;
+}
+
 export interface BootstrapConfig {
   message_policy?: MessagePolicy;
   limits?: { max_forward_targets?: number; [key: string]: unknown };
   security?: { realname?: RealnameStatus };
+  entries?: {
+    new_friends?: BootstrapEntry;
+    groups?: BootstrapEntry;
+    file_assistant?: BootstrapEntry;
+    system_messages?: BootstrapEntry;
+  };
+  entry_badges?: {
+    new_friends_pending_count?: number;
+    groups_unread_count?: number;
+    file_assistant_unread_count?: number;
+    system_unread_count?: number;
+    workbench_total_unread?: number;
+  };
+  system_topic?: { topic: string; type: string };
   [key: string]: unknown;
 }