fix(web): keep the settings dialog one size and move billing into it (BUG-554)

The four account panes now share a fixed frame, chart profiles open as list then detail, and membership lives in the homepage dialog instead of a separate page.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/rectification-agentic-chat.tsx

@@ -44,14 +44,12 @@ import {
   diffRectificationBoard,
   RECTIFICATION_BOARD_SPLIT_MIN_PX,
 } from "@/lib/rectification-board-model";
-import { membershipHref } from "@/lib/membership";
 import { rectificationTimelineRows } from "@/lib/rectification-timeline-adapter";
 import {
   rectificationAdoptingLabel,
   RECTIFICATION_EMPTY_ACTION_LABEL,
   RECTIFICATION_EMPTY_COPY,
   RECTIFICATION_INSUFFICIENT_CREDITS_NOTICE,
-  RECTIFICATION_INSUFFICIENT_CREDITS_REDIRECT_MS,
   RECTIFICATION_QUESTION_PREPARING_LABEL,
   RECTIFICATION_QUESTION_RELOAD_LABEL,
   RECTIFICATION_QUESTION_RETRY_INTERVAL_MS,
@@ -240,6 +238,7 @@ type RectificationAgenticChatProps = Readonly<{
   onCompleted?: () => void;
   onPendingChange?: (pending: boolean) => void;
   onProfileIncomplete?: () => void;
+  onOpenBilling?: (options?: { source?: string }) => void;
   onSaved?: (time: string, status: "accepted" | "confirmed") => void;
   onOpeningConsumed?: () => void;
   pendingConsultationQuestion?: string | null;
@@ -476,6 +475,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
     onCompleted,
     onPendingChange,
     onProfileIncomplete,
+    onOpenBilling,
     onSaved,
     onOpeningConsumed,
     pendingConsultationQuestion,
@@ -824,11 +824,9 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
           return;
         }
         if (response.status === 402) {
-          // Say why before the page leaves, instead of vanishing mid-chat.
+          // Keep the conversation on this page; the settings pane covers billing.
           setError(RECTIFICATION_INSUFFICIENT_CREDITS_NOTICE);
-          window.setTimeout(() => {
-            window.location.assign(membershipHref("rectification"));
-          }, RECTIFICATION_INSUFFICIENT_CREDITS_REDIRECT_MS);
+          onOpenBilling?.({ source: "rectification" });
           return;
         }
         if (response.status === 401) setError("请先登录。");
@@ -1053,7 +1051,7 @@ export function RectificationAgenticChat(props: RectificationAgenticChatProps) {
       lastRunOutcome.current = readonly ? "readonly" : runOutcome;
       setPending(false);
     }
-  }, [beginLiveRun, busy, caseId, loadCaseSnapshot, onCompleted, onMessagesChange, onProfileIncomplete, readonly, rememberLiveActivity, selectedModelId, sessionId, setPending]);
+  }, [beginLiveRun, busy, caseId, loadCaseSnapshot, onCompleted, onMessagesChange, onOpenBilling, onProfileIncomplete, readonly, rememberLiveActivity, selectedModelId, sessionId, setPending]);
 
   useEffect(() => {
     if (busy) return;