feat(sasquatch): align client models with the node + owner AI-balance nudge

- sasquatchBrain: PROXY_MODELS now match the Routstr node's slugs
  (gemini-3-6-flash, z-ai-glm-5-3, gemini-3-7-flash).
- ai.mjs: new owner-only POST /api/ai/status (NIP-98 + owner pubkey) returning the
  upstream balance + a 'low' flag (<500 sats); config.path now serves both routes.
- useSasquatchAiStatus + SasquatchAiStatusCard (owner-only, in Settings): shows the
  balance and warns when low — the top-up nudge, no webhook/notification key needed.

netlify/functions/ai.mjs

@@ -196,6 +196,30 @@ function json(body, status, headers) {
   });
 }
 
+/**
+ * Owner-only: report the upstream (Routstr) account balance, so the app can nudge
+ * the operator to top up before AI degrades to the keyless fallback. This is a
+ * simpler "low balance" signal than wiring a Routstr webhook, which would need a
+ * notification channel (a signing key) we don't otherwise have server-side.
+ */
+async function handleStatus(request, headers) {
+  const pubkey = verifyNip98(request.headers.get('x-sasquatch-auth'));
+  if (!pubkey) return json({ error: 'auth required' }, 401, headers);
+  if (!PLATFORM_OWNER_PUBKEYS.has(pubkey)) return json({ error: 'forbidden' }, 403, headers);
+  if (!AI_KEY) return json({ configured: false }, 200, headers);
+  try {
+    const r = await fetch(`${AI_BASE}/balance/info`, {
+      headers: { Authorization: `Bearer ${AI_KEY}` },
+      signal: AbortSignal.timeout(8000),
+    });
+    const j = await r.json().catch(() => ({}));
+    const balanceSats = Math.floor(Number(j.balance ?? 0) / 1000);
+    return json({ configured: true, balanceSats, low: balanceSats < 500, provider: AI_BASE }, 200, headers);
+  } catch {
+    return json({ configured: true, balanceSats: null, low: false }, 200, headers);
+  }
+}
+
 export default async function handler(request) {
   const origin = request.headers.get('origin') || '';
   const headers = corsHeaders(origin);
@@ -203,6 +227,9 @@ export default async function handler(request) {
   if (request.method === 'OPTIONS') return new Response(null, { status: 204, headers });
   if (request.method !== 'POST') return json({ error: 'Method not allowed' }, 405, headers);
 
+  // Owner-only balance status (for the low-balance nudge).
+  if (new URL(request.url).pathname === '/api/ai/status') return handleStatus(request, headers);
+
   // Pro gate (env-gated): require a NIP-98-signed identity and, unless the
   // caller is a platform owner, an active Pro pass.
   if (REQUIRE_PRO) {
@@ -273,5 +300,5 @@ export default async function handler(request) {
   return new Response(upstream.body, { status: upstream.status, headers: passthrough });
 }
 
-// Netlify Functions v2 routing — serve this at /api/ai.
-export const config = { path: '/api/ai' };
+// Netlify Functions v2 routing — serve the proxy plus its status endpoint.
+export const config = { path: ['/api/ai', '/api/ai/status'] };

src/components/SasquatchAiStatusCard.tsx

@@ -0,0 +1,63 @@
+import { AlertTriangle, Coins, Loader2 } from 'lucide-react';
+import { Card, CardContent } from '@/components/ui/card';
+import { useCurrentUser } from '@/hooks/useCurrentUser';
+import { PLATFORM_OWNER_PUBKEYS } from '@/hooks/useListingRestrictions';
+import { useSasquatchAiStatus } from '@/hooks/useSasquatchAiStatus';
+import { cn } from '@/lib/utils';
+
+/**
+ * Owner-only card: the Sasquatch AI (Routstr node) balance, with a warning when
+ * it's running low. This is the "top up before AI degrades" nudge — no webhook
+ * needed, since the operator can see it live in Settings.
+ */
+export function SasquatchAiStatusCard() {
+  const { user } = useCurrentUser();
+  const isOwner = !!user?.pubkey && PLATFORM_OWNER_PUBKEYS.includes(user.pubkey);
+  const { data, isLoading, isError } = useSasquatchAiStatus();
+
+  if (!isOwner) return null;
+
+  const low = data?.low === true;
+  const balance = data?.balanceSats;
+
+  return (
+    <Card className={cn('overflow-hidden bg-white/2', low ? 'border-amber-500/40' : 'border-white/10')}>
+      <CardContent className="py-3.5">
+        <div className="flex items-center justify-between gap-3">
+          <p className="flex items-center gap-2 text-sm font-bold text-white">
+            {low ? (
+              <AlertTriangle className="h-4 w-4 text-amber-400" />
+            ) : (
+              <Coins className="h-4 w-4 text-red-400" />
+            )}
+            Sasquatch AI
+            <span className="rounded bg-red-500/10 px-1.5 py-0.5 text-[9px] font-black uppercase tracking-widest text-red-400/70">
+              Owner
+            </span>
+          </p>
+          <span
+            className={cn(
+              'shrink-0 text-xs font-bold',
+              isError ? 'text-gray-500' : low ? 'text-amber-400' : 'text-green-400',
+            )}
+          >
+            {isLoading ? (
+              <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" />
+            ) : isError || data?.configured === false ? (
+              'not configured'
+            ) : balance === null || balance === undefined ? (
+              'unavailable'
+            ) : (
+              `${balance.toLocaleString()} sats`
+            )}
+          </span>
+        </div>
+        <p className="mt-1 text-xs text-muted-foreground">
+          {low
+            ? `Running low — top up at ${data?.provider ?? 'the node'} or AI will fall back to the keyless provider.`
+            : 'Pay-per-request AI, funded in sats via Routstr. Tops up when low.'}
+        </p>
+      </CardContent>
+    </Card>
+  );
+}

src/hooks/useSasquatchAiStatus.ts

@@ -0,0 +1,48 @@
+import { useQuery } from '@tanstack/react-query';
+import { Capacitor } from '@capacitor/core';
+import { useCurrentUser } from '@/hooks/useCurrentUser';
+import { PLATFORM_OWNER_PUBKEYS } from '@/hooks/useListingRestrictions';
+import { buildProAuthHeaders } from '@/lib/proAuth';
+
+/** Report shape from the proxy's owner-only `/api/ai/status`. */
+export interface SasquatchAiStatus {
+  configured: boolean;
+  balanceSats: number | null;
+  low: boolean;
+  provider?: string;
+}
+
+const AI_STATUS_URL = Capacitor.isNativePlatform()
+  ? 'https://skate-spots.org/api/ai/status'
+  : '/api/ai/status';
+
+/**
+ * Owner-only: the Sasquatch AI (upstream) account balance, so the operator can be
+ * nudged to top up before AI silently degrades to the keyless fallback. Polled
+ * every few minutes. Returns `undefined`/skips for non-owners.
+ */
+export function useSasquatchAiStatus() {
+  const { user } = useCurrentUser();
+  const isOwner = !!user?.pubkey && PLATFORM_OWNER_PUBKEYS.includes(user.pubkey);
+
+  return useQuery<SasquatchAiStatus>({
+    queryKey: ['sasquatch-ai-status', user?.pubkey],
+    enabled: isOwner,
+    refetchInterval: 5 * 60 * 1000,
+    staleTime: 60 * 1000,
+    queryFn: async () => {
+      const authHeaders = await buildProAuthHeaders({
+        pubkey: user!.pubkey,
+        signEvent: (e) => user!.signer.signEvent(e),
+      });
+      const res = await fetch(AI_STATUS_URL, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json', ...authHeaders },
+        body: '{}',
+        signal: AbortSignal.timeout(10000),
+      });
+      if (!res.ok) throw new Error(`AI status ${res.status}`);
+      return (await res.json()) as SasquatchAiStatus;
+    },
+  });
+}

src/lib/sasquatchBrain.ts

@@ -19,20 +19,17 @@ const AI_PROXY_URL = Capacitor.isNativePlatform()
   ? 'https://skate-spots.org/api/ai'
   : '/api/ai';
 
-// Models Sasquatch may request through the proxy, in preference order. These are
-// verified to work via Netlify's AI Gateway — which enforces a Zero-Data-
-// Retention policy, so not every OpenRouter model is routable (gemini/anthropic/
-// gpt-4o-mini are not). If one is rate-limited (429) we back off briefly then
-// move to the next; Pollinations is the keyless fallback.
-// Keep this list in sync with ALLOWED_MODELS in netlify/functions/ai.mjs.
+// Models Sasquatch requests through the proxy, in preference order. These are
+// the slugs served by our upstream (a Routstr node — see AGENTS.md), which are
+// OpenAI-style ids rather than OpenRouter's. If one is rate-limited (429) we back
+// off briefly then try the next; Pollinations is the keyless fallback.
+// The server is authoritative: keep this list in sync with `SASQUATCH_MODELS`
+// (and ALLOWED_MODELS in netlify/functions/ai.mjs) — but it's not fatal if they
+// drift, because the proxy substitutes its first allowed model.
 export const PROXY_MODELS = [
-  'meta-llama/llama-3.3-70b-instruct',
-  'deepseek/deepseek-chat-v3-0324',
-  'x-ai/grok-4.5',
-  'moonshotai/kimi-k2',
-  'qwen/qwen-2.5-72b-instruct',
-  'mistralai/mistral-nemo',
-  'meta-llama/llama-3.1-8b-instruct',
+  'gemini-3-6-flash',
+  'z-ai-glm-5-3',
+  'gemini-3-7-flash',
 ];
 
 export type ChatTurn = { role: 'system' | 'user' | 'assistant'; content: string };

src/pages/SettingsPage.tsx

@@ -8,6 +8,7 @@ import { WalletModal } from '@/components/WalletModal';
 import { SecuritySettings } from '@/components/SecuritySettings';
 import { RelatrSettings } from '@/components/RelatrSettings';
 import { CVMHealthCheck } from '@/components/CVMHealthCheck';
+import { SasquatchAiStatusCard } from '@/components/SasquatchAiStatusCard';
 import { LanguageSelector } from '@/components/LanguageToggle';
 import { DesktopNavManager } from '@/components/DesktopNavManager';
 import { MyDataTab } from '@/components/MyDataTab';
@@ -586,8 +587,9 @@ function AdvancedScreen({ onBack }: { onBack: () => void }) {
       <BackHeader title="Advanced" onBack={onBack} />
       <div className="space-y-4">
         <RelatrSettings />
-        {/* Owner-only — renders null for everyone except platform owners. */}
+        {/* Owner-only — render null for everyone except platform owners. */}
         <CVMHealthCheck />
+        <SasquatchAiStatusCard />
         <div className="rounded-2xl border border-amber-500/20 overflow-hidden bg-white/2">
           <div className="px-4 py-3.5 border-b border-white/5">
             <p className="text-sm font-bold text-amber-400">🦧 Sasquatch Guide</p>