feat(ai): ollama embed-text wrapper

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

lib/ai/ollama.js

@@ -0,0 +1,24 @@
+export class OllamaError extends Error {
+  constructor(status, body) { super(`ollama ${status}: ${body}`); this.status = status; }
+}
+
+export async function embedText(text, { model = 'nomic-embed-text', timeoutMs = 60_000 } = {}) {
+  const url = (process.env.OLLAMA_URL || 'http://192.168.1.185:11434') + '/api/embeddings';
+  const res = await fetch(url, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ model, prompt: text }),
+    signal: AbortSignal.timeout(timeoutMs)
+  });
+  if (!res.ok) throw new OllamaError(res.status, await res.text());
+  const j = await res.json();
+  return j.embedding;
+}
+
+export function padTo(vector, dim) {
+  if (vector.length === dim) return vector;
+  if (vector.length > dim) return vector.slice(0, dim);
+  const out = vector.slice();
+  while (out.length < dim) out.push(0);
+  return out;
+}