feat(web): add Go campaign entries and route upgrades to Pricing

apps/web/src/campaigns/go-plan.ts

@@ -0,0 +1,36 @@
+import type { DeepSeekV4FlashCampaignAudience } from './deepseek-v4-flash';
+
+export const GO_PLAN_CAMPAIGN = {
+  id: 'go-plan-launch-2026',
+  window: {
+    startAt: '2026-08-20T20:00:00+08:00',
+    endAtExclusive: '2026-09-03T20:00:00+08:00',
+  },
+} as const;
+
+export const GO_PLAN_PRICING_URL = 'https://open-design.ai/pricing/';
+
+export function isGoPlanCampaignWindowOpen(now: number): boolean {
+  const startAt = Date.parse(GO_PLAN_CAMPAIGN.window.startAt);
+  const endAtExclusive = Date.parse(GO_PLAN_CAMPAIGN.window.endAtExclusive);
+  return now >= startAt && now < endAtExclusive;
+}
+
+export function goPlanCampaignNextBoundary(now: number): number | null {
+  const startAt = Date.parse(GO_PLAN_CAMPAIGN.window.startAt);
+  const endAtExclusive = Date.parse(GO_PLAN_CAMPAIGN.window.endAtExclusive);
+  if (now < startAt) return startAt;
+  if (now < endAtExclusive) return endAtExclusive;
+  return null;
+}
+
+/** Resolve subscription state without coupling the permanent Go entry to a campaign window. */
+export function resolveSubscriptionAudience(input: {
+  plan: string | null | undefined;
+  loggedIn: boolean | null | undefined;
+}): DeepSeekV4FlashCampaignAudience {
+  const plan = input.plan?.trim().toLowerCase() ?? '';
+  if (plan === 'free' || input.loggedIn === false) return 'unpaid';
+  if (plan) return 'paid';
+  return 'unknown';
+}

apps/web/src/campaigns/use-go-plan-campaign.ts

@@ -0,0 +1,21 @@
+import { useEffect, useState } from 'react';
+import {
+  goPlanCampaignNextBoundary,
+  isGoPlanCampaignWindowOpen,
+} from './go-plan';
+
+export function useGoPlanCampaignVisibility(): { now: number; visible: boolean } {
+  const [now, setNow] = useState(() => Date.now());
+
+  useEffect(() => {
+    const boundary = goPlanCampaignNextBoundary(Date.now());
+    if (boundary === null) return;
+    const timer = window.setTimeout(
+      () => setNow(Date.now()),
+      Math.max(0, boundary - Date.now()) + 50,
+    );
+    return () => window.clearTimeout(timer);
+  }, [now]);
+
+  return { now, visible: isGoPlanCampaignWindowOpen(now) };
+}

apps/web/src/components/AmrBalanceDialog.tsx

@@ -95,18 +95,8 @@ export function AmrBalanceDialog({
   // resume the parked task via onResolved. Bounded so an abandoned recharge
   // doesn't poll forever; guarded against double-fires.
   const [watchingWallet, setWatchingWallet] = useState(false);
-  // Where 「升级套餐」 goes. `workspaceUpgradeUrl` is the one decision point for
-  // every upgrade affordance: personal workspace → B's personal plan modal
-  // (`billing=plan`); team → `billing=checkout` vs `billing=plan` by whether
-  // the team ever completed a first checkout. Getting the personal branch wrong
-  // opened an error-state dialog: routing a personal workspace onto the team
-  // `billing=checkout` deep link opened the Upgrade-to-Team dialog with "Team
-  // plan unavailable" / a 3-seat minimum (recvpYEiH019cD, failed acceptance
-  // round). B now resolves `billing=plan` against the workspace's own state, so
-  // the team branch's guess is a hint rather than a requirement. The profile
-  // fallback keeps the CTA alive after a signed-out/no-context read (but not
-  // while that read is pending) — same `billing=plan` deep link every other
-  // Upgrade affordance uses (ChatPane, AvatarMenu, InlineModelSwitcher).
+  // `workspaceUpgradeUrl` keeps every generic upgrade affordance on the public
+  // Pricing comparison surface. A concrete card there owns the Cloud handoff.
   const {
     context: workspaceContext,
     loading: workspaceContextLoading,