fix: mention closure, onSettled invalidation, cleanup singleton

- Fix Tiptap mention: pass QueryClient via closure from ContentEditor
  instead of getQueryClient() singleton (resolves @mention empty list)
- Add onSettled invalidation to useUpdateIssue (prevents cache drift
  with staleTime: Infinity + self-event WS filter)
- Add cache shape comment to issueListOptions (select transforms
  ListIssuesResponse → Issue[], but cache stores raw response)
- Memoize sidebar inbox dedup computation
- Remove dead getQueryClient/setQueryClient singleton + window property
- Remove ActorSync component and _members/_agents Zustand mirror
  (superseded by closure approach)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/features/editor/content-editor.tsx

@@ -34,6 +34,7 @@ import {
 import { useEditor, EditorContent } from "@tiptap/react";
 import { cn } from "@/lib/utils";
 import type { UploadResult } from "@/shared/hooks/use-file-upload";
+import { useQueryClient } from "@tanstack/react-query";
 import { createEditorExtensions } from "./extensions";
 import { uploadAndInsertFile } from "./extensions/file-upload";
 import { preprocessMarkdown } from "./utils/preprocess";
@@ -94,6 +95,8 @@ const ContentEditor = forwardRef<ContentEditorRef, ContentEditorProps>(
     onBlurRef.current = onBlur;
     onUploadFileRef.current = onUploadFile;
 
+    const queryClient = useQueryClient();
+
     const editor = useEditor({
       immediatelyRender: false,
       editable,
@@ -102,6 +105,7 @@ const ContentEditor = forwardRef<ContentEditorRef, ContentEditorProps>(
       extensions: createEditorExtensions({
         editable,
         placeholder: placeholderText,
+        queryClient,
         onSubmitRef,
         onUploadFileRef,
       }),

apps/web/features/editor/extensions/index.ts

@@ -76,6 +76,7 @@ const ImageExtension = Image.extend({
 export interface EditorExtensionsOptions {
   editable: boolean;
   placeholder?: string;
+  queryClient?: import("@tanstack/react-query").QueryClient;
   onSubmitRef?: RefObject<(() => void) | undefined>;
   onUploadFileRef?: RefObject<
     ((file: File) => Promise<UploadResult | null>) | undefined
@@ -107,7 +108,7 @@ export function createEditorExtensions(
     Markdown,
     BaseMentionExtension.configure({
       HTMLAttributes: { class: "mention" },
-      ...(editable ? { suggestion: createMentionSuggestion() } : {}),
+      ...(editable && options.queryClient ? { suggestion: createMentionSuggestion(options.queryClient) } : {}),
     }),
   ];
 

apps/web/features/editor/extensions/mention-suggestion.tsx

@@ -10,8 +10,8 @@ import {
 } from "react";
 import { ReactRenderer } from "@tiptap/react";
 import { computePosition, offset, flip, shift } from "@floating-ui/dom";
+import type { QueryClient } from "@tanstack/react-query";
 import { useWorkspaceStore } from "@/features/workspace";
-import { getQueryClient } from "@core/query-client";
 import { issueKeys } from "@core/issues/queries";
 import { workspaceKeys } from "@core/workspace/queries";
 import type { Issue, ListIssuesResponse, MemberWithUser, Agent } from "@/shared/types";
@@ -213,18 +213,19 @@ function MentionRow({
 // Suggestion config factory
 // ---------------------------------------------------------------------------
 
-export function createMentionSuggestion(): Omit<
+export function createMentionSuggestion(qc: QueryClient): Omit<
   SuggestionOptions<MentionItem>,
   "editor"
 > {
   return {
     items: ({ query }) => {
       const wsId = useWorkspaceStore.getState().workspace?.id;
-      const members: MemberWithUser[] = wsId ? getQueryClient().getQueryData(workspaceKeys.members(wsId)) ?? [] : [];
-      const agents: Agent[] = wsId ? getQueryClient().getQueryData(workspaceKeys.agents(wsId)) ?? [] : [];
+      const members: MemberWithUser[] = wsId ? qc.getQueryData(workspaceKeys.members(wsId)) ?? [] : [];
+      const agents: Agent[] = wsId ? qc.getQueryData(workspaceKeys.agents(wsId)) ?? [] : [];
       const issues: Issue[] = wsId
-        ? getQueryClient().getQueryData<ListIssuesResponse>(issueKeys.list(wsId))?.issues ?? []
+        ? qc.getQueryData<ListIssuesResponse>(issueKeys.list(wsId))?.issues ?? []
         : [];
+
       const q = query.toLowerCase();
 
       // Show "All members" option when query is empty or matches "all"