Add Ollama status checks and Docker deployment

src/lib/ollama.ts

@@ -5,14 +5,75 @@ export class OllamaUnavailableError extends Error {
   }
 }
 
+export type OllamaStatus = {
+  available: boolean;
+  configuredModel: string;
+  configuredUrl: string;
+  installedModels: string[];
+  modelReady: boolean;
+  message: string;
+};
+
 type GenerateJsonInput = {
   prompt: string;
   model?: string;
 };
 
+function getOllamaConfig() {
+  return {
+    baseUrl: (process.env.OLLAMA_URL ?? "http://127.0.0.1:11434").replace(/\/$/, ""),
+    model: process.env.OLLAMA_MODEL ?? "qwen3.5:9b",
+  };
+}
+
+export async function getOllamaStatus(): Promise<OllamaStatus> {
+  const { baseUrl, model } = getOllamaConfig();
+
+  try {
+    const response = await fetch(`${baseUrl}/api/tags`, {
+      method: "GET",
+      headers: { "Content-Type": "application/json" },
+      cache: "no-store",
+    });
+
+    if (!response.ok) {
+      throw new OllamaUnavailableError(`Ollama status request failed with status ${response.status}.`);
+    }
+
+    const payload = (await response.json()) as { models?: Array<{ name?: string }> };
+    const installedModels = (payload.models ?? []).map((entry) => entry.name).filter((name): name is string => Boolean(name));
+    const modelReady = installedModels.includes(model);
+
+    return {
+      available: true,
+      configuredModel: model,
+      configuredUrl: baseUrl,
+      installedModels,
+      modelReady,
+      message: modelReady
+        ? `Ollama is reachable and ${model} is ready.`
+        : `Ollama is reachable, but ${model} is not pulled yet.`,
+    };
+  } catch (error) {
+    const message =
+      error instanceof OllamaUnavailableError
+        ? error.message
+        : "Ollama is not reachable at the configured URL.";
+
+    return {
+      available: false,
+      configuredModel: model,
+      configuredUrl: baseUrl,
+      installedModels: [],
+      modelReady: false,
+      message,
+    };
+  }
+}
+
 export async function generateOllamaJson<T>({ prompt, model }: GenerateJsonInput): Promise<T> {
-  const baseUrl = (process.env.OLLAMA_URL ?? "http://127.0.0.1:11434").replace(/\/$/, "");
-  const selectedModel = model ?? process.env.OLLAMA_MODEL ?? "qwen3.5:9b";
+  const { baseUrl, model: configuredModel } = getOllamaConfig();
+  const selectedModel = model ?? configuredModel;
 
   let response: Response;