feat(ai): expose node/gpu meta and improve chat UX

backend/app.py

@@ -34,6 +34,11 @@ AI_CHAT_SYSTEM_PROMPT = os.getenv(
     "You are the Titan Lab assistant for bstein.dev. Be concise and helpful.",
 )
 AI_CHAT_TIMEOUT_SEC = float(os.getenv("AI_CHAT_TIMEOUT_SEC", "20"))
+AI_NODE_NAME = os.getenv("AI_NODE_NAME") or os.getenv("NODE_NAME") or "unknown"
+try:
+    AI_NODE_GPU_MAP = json.loads(os.getenv("AI_NODE_GPU_MAP", "{}"))
+except json.JSONDecodeError:
+    AI_NODE_GPU_MAP = {}
 
 _LAB_STATUS_CACHE: dict[str, Any] = {"ts": 0.0, "value": None}
 
@@ -181,6 +186,19 @@ def ai_chat() -> Any:
         return jsonify({"error": str(exc)}), 502
 
 
+@app.route("/api/ai/info", methods=["GET"])
+def ai_info() -> Any:
+    gpu_label = AI_NODE_GPU_MAP.get(AI_NODE_NAME, "local GPU (dynamic)")
+    return jsonify(
+        {
+            "node": AI_NODE_NAME,
+            "gpu": gpu_label,
+            "model": AI_CHAT_MODEL,
+            "endpoint": "/api/ai/chat",
+        }
+    )
+
+
 @app.route("/", defaults={"path": ""})
 @app.route("/<path:path>")
 def serve_frontend(path: str) -> Any:

frontend/src/views/AiView.vue

@@ -5,23 +5,26 @@
         <p class="eyebrow">Atlas AI</p>
         <h1>Chat</h1>
         <p class="lede">
-          Lightweight LLM running on local GPU accelerated hardware. Anyone can chat without auth. The client streams responses
+          Lightweight LLM running on local GPU accelerated hardware. Anyone can chat without auth. The client streams responses,
-          and shows round-trip latency for each turn.
+          shows round-trip latency for each turn, and we're training an Atlas-aware model steeped in Titan Lab context.
         </p>
         <div class="pill mono pill-live">Online</div>
       </div>
       <div class="hero-facts">
         <div class="fact">
           <span class="label mono">Model</span>
-          <span class="value mono">qwen2.5-coder:7b-instruct-q4_0</span>
+          <span class="value mono">{{ meta.model }}</span>
         </div>
         <div class="fact">
           <span class="label mono">GPU</span>
-          <span class="value mono">local GPU (dynamic)</span>
+          <span class="value mono">{{ meta.gpu }}</span>
         </div>
         <div class="fact">
           <span class="label mono">Endpoint</span>
-          <span class="value mono">{{ apiHost }}</span>
+          <button class="endpoint-copy mono" type="button" @click="copyCurl">
+            {{ apiHost }}
+            <span v-if="copied" class="copied">copied</span>
+          </button>
         </div>
       </div>
     </section>
@@ -81,12 +84,17 @@ curl -X POST https://chat.ai.bstein.dev/api/ai/chat \
 </template>
 
 <script setup>
-import { onUpdated, ref } from "vue";
+import { onMounted, onUpdated, ref } from "vue";
 
 const API_URL = (import.meta.env.VITE_AI_ENDPOINT || "/api/ai/chat").trim();
 const apiHost = new URL(API_URL, window.location.href).host + new URL(API_URL, window.location.href).pathname;
 const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));
 
+const meta = ref({
+  model: "loading...",
+  gpu: "local GPU (dynamic)",
+  node: "unknown",
+});
 const messages = ref([
   {
     role: "assistant",
@@ -97,6 +105,9 @@ const draft = ref("");
 const sending = ref(false);
 const error = ref("");
 const chatWindow = ref(null);
+const copied = ref(false);
+
+onMounted(fetchMeta);
 
 onUpdated(() => {
   if (chatWindow.value) {
@@ -104,6 +115,21 @@ onUpdated(() => {
   }
 });
 
+async function fetchMeta() {
+  try {
+    const resp = await fetch("/api/ai/info");
+    if (!resp.ok) return;
+    const data = await resp.json();
+    meta.value = {
+      model: data.model || meta.value.model,
+      gpu: data.gpu || meta.value.gpu,
+      node: data.node || meta.value.node,
+    };
+  } catch {
+    // swallow
+  }
+}
+
 async function sendMessage() {
   if (!draft.value.trim() || sending.value) return;
   const text = draft.value.trim();
@@ -179,6 +205,17 @@ function handleKeydown(e) {
     sendMessage();
   }
 }
+
+async function copyCurl() {
+  const curl = `curl -X POST ${new URL(API_URL, window.location.href).toString()} -H 'content-type: application/json' -d '{\"message\":\"hi\"}'`;
+  try {
+    await navigator.clipboard.writeText(curl);
+    copied.value = true;
+    setTimeout(() => (copied.value = false), 1400);
+  } catch {
+    copied.value = false;
+  }
+}
 </script>
 
 <style scoped>
@@ -217,6 +254,22 @@ function handleKeydown(e) {
   margin-top: 4px;
 }
 
+.endpoint-copy {
+  background: none;
+  color: inherit;
+  border: 1px solid var(--card-border);
+  border-radius: 8px;
+  padding: 6px 8px;
+  width: 100%;
+  text-align: left;
+  cursor: pointer;
+}
+.endpoint-copy .copied {
+  float: right;
+  color: var(--accent-cyan);
+  font-size: 11px;
+}
+
 .pill-live {
   display: inline-block;
   margin-top: 8px;