feat(sasquatch-pro): crew agent sends Pro credentials too

useCrewAgentChat now signs the same NIP-98 auth + attaches the viewer's Pro
receipt (when they have one), so the proxy's Pro gate lets Pro users through the
gateway models; everyone else still falls back to the keyless provider.

src/hooks/useCrewAgentChat.ts

@@ -1,6 +1,9 @@
 import { useState, useCallback } from 'react';
 import { useCVMClient } from '@/hooks/useCVMClient';
 import { callSasquatchAI, parseToolCall, type ChatTurn } from '@/lib/sasquatchBrain';
+import { useCurrentUser } from '@/hooks/useCurrentUser';
+import { useSasquatchPro } from '@/hooks/useSasquatchPro';
+import { buildProAuthHeaders } from '@/lib/proAuth';
 
 export interface CrewAgentMessage {
   id: string;
@@ -166,6 +169,8 @@ Rules:
  */
 export function useCrewAgentChat(ctx: CrewContext) {
   const cvm = useCVMClient();
+  const { user } = useCurrentUser();
+  const { isPro, receiptEvent } = useSasquatchPro();
   const [messages, setMessages] = useState<CrewAgentMessage[]>([]);
   const [isThinking, setIsThinking] = useState(false);
 
@@ -206,12 +211,21 @@ export function useCrewAgentChat(ctx: CrewContext) {
       append({ role: 'user', text: q });
 
       try {
+        // Pass the viewer's identity + Pro pass so the proxy's gate (when on)
+        // lets Pro users through; others fall back to the keyless provider.
+        const authHeaders = isPro
+          ? await buildProAuthHeaders({
+              pubkey: user?.pubkey,
+              signEvent: user ? (e) => user.signer.signEvent(e) : undefined,
+              receiptEvent,
+            })
+          : {};
         const system = buildCrewSystemPrompt(ctx);
         // First pass — AI answers directly from crew memory or emits a tool call.
         const firstPass: ChatTurn[] = [
           { role: 'user', content: `${system}\n\n---\n\nMember: ${q}` },
         ];
-        const aiText = await callSasquatchAI(firstPass);
+        const aiText = await callSasquatchAI(firstPass, 400, undefined, authHeaders);
         const toolCall = parseToolCall(aiText);
 
         if (!toolCall) {
@@ -246,7 +260,7 @@ ${JSON.stringify(toolResult, null, 2)}
 - If count > 0: a short intro line — the app shows the results as cards below your message
 - Keep it short and skater-friendly. Never invent data.`,
           },
-        ]);
+        ], 400, undefined, authHeaders);
 
         append({
           role: 'agent',
@@ -263,7 +277,7 @@ ${JSON.stringify(toolResult, null, 2)}
         setIsThinking(false);
       }
     },
-    [ctx, isThinking, append, runTool],
+    [ctx, isThinking, append, runTool, isPro, receiptEvent, user],
   );
 
   return { messages, isThinking, send };