Add a secure repository Prompts review surface and prompt metadata API

Hop-State: A_06FN6MRSHG4B64ZV13086G8
Hop-Proposal: R_06FN6MQDE14FFNR65H1D28G
Hop-Task: T_06FN6J8ECE1Z9XQ5PQ3Z3D8
Hop-Attempt: AT_06FN6J8ECC1SC794JMZ0TF8

docs/production-deployment.md

@@ -27,5 +27,20 @@ docker compose --env-file .env up --build -d
 
 The reverse proxy should forward the public hostname to the configured
 `GITEA_HTTP_BIND:GITEA_HTTP_PORT`, preserve the `Host` header, and set
-`X-Forwarded-Proto` to `https`. Persistent repository and database data live in
-the named Compose volumes.
+`X-Forwarded-Proto` to `https`. It must also proxy `/hop/` to the Hop control
+plane, preserving the browser's Gitea session cookie. This lets the Prompts
+view check the viewer's repository access before returning potentially
+sensitive prompt text.
+
+For nginx, the control-plane location should precede the Gitea catch-all:
+
+```nginx
+location /hop/ {
+    proxy_pass http://127.0.0.1:8080/;
+    proxy_set_header Host $host;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Cookie $http_cookie;
+}
+```
+
+Persistent repository and database data live in the named Compose volumes.