Deployment Script, Postgres migration, UX improvements

frontend/src/lib/api.ts

@@ -224,6 +224,34 @@ async function request<T>(
   }
 }
 
+async function requestBlob(
+  path: string,
+  auth: AuthMode = 'none',
+  fetcher: ApiFetch = fetch
+): Promise<Blob> {
+  try {
+    const token = getToken(auth);
+    const response = await fetcher(buildApiUrl(path), {
+      headers: token ? { Authorization: `Bearer ${token}` } : undefined
+    });
+
+    if (!response.ok) {
+      let message = 'Request failed';
+      try {
+        const body = (await response.json()) as { detail?: string };
+        message = body.detail ?? message;
+      } catch {
+        message = response.statusText || message;
+      }
+      throw new Error(message);
+    }
+
+    return await response.blob();
+  } catch (error) {
+    throw normalizeRequestError(error);
+  }
+}
+
 export const api = {
   rawMaterials: (fetcher?: ApiFetch) => cachedFetchJson<RawMaterial[]>('/api/raw-materials', mockRawMaterials, 'client', fetcher),
   mixes: (fetcher?: ApiFetch) => cachedFetchJson('/api/mixes', mockMixes, 'client', fetcher),
@@ -234,6 +262,8 @@ export const api = {
     cachedFetchJson<MixCalculatorSession[]>('/api/mix-calculator', mockMixCalculatorSessions, 'client', fetcher),
   mixCalculatorSession: (sessionId: number, fetcher?: ApiFetch) =>
     request<MixCalculatorSession>(`/api/mix-calculator/${sessionId}`, { method: 'GET' }, 'client', fetcher),
+  mixCalculatorSessionPdf: (sessionId: number, fetcher?: ApiFetch) =>
+    requestBlob(`/api/mix-calculator/${sessionId}/pdf`, 'client', fetcher),
   previewMixCalculatorSession: (payload: MixCalculatorCreateInput) =>
     request<MixCalculatorPreview>('/api/mix-calculator/preview', {
       method: 'POST',