fix(sync): harden Dropbox loading

src/App.tsx

@@ -192,68 +192,55 @@ export default function App() {
       setDefaultLoadError(null);
 
       try {
-        const isDev = import.meta.env.DEV;
-        
         let rows: any[][];
         let allData: any[][];
         let fileMeta = { rev: '', size: 0 };
-        
+
-        if (isDev) {
+        const loadWorkbookFromUrl = async (url: string) => {
-          const cacheBuster = `t_${Date.now()}`;
+          const response = await fetch(url, { cache: 'no-store' });
-          const fileUrl = `/dropbox-file/scl/fi/usa8me7ywgylrij2bt6hj/Data-Matrix.xlsx?rlkey=tsec8csrhye54u1fdvk15ped1&st=qbxxs4cn&dl=0&${cacheBuster}=${Date.now()}`;
+          if (!response.ok) throw new Error(`HTTP ${response.status}`);
-          console.log('Fetching Data-Matrix.xlsx from Dropbox (hard refresh)...');
+
+          const contentType = response.headers.get('content-type');
+          if (contentType && contentType.includes('text/html')) {
+            throw new Error('Dropbox returned an HTML page instead of the Excel file.');
+          }
+
+          const arrayBuffer = await response.arrayBuffer();
+          if (arrayBuffer.byteLength < 100) throw new Error('File too small');
+
+          const wb = XLSX.read(arrayBuffer, { type: 'array' });
+          const wsname = wb.SheetNames[0];
+          const ws = wb.Sheets[wsname];
+          allData = XLSX.utils.sheet_to_json<any[]>(ws, { header: 1 });
+          rows = allData.slice(1);
+          return arrayBuffer.byteLength;
+        };
+
+        const dropboxSources = import.meta.env.DEV
+          ? [
+              '/api/dropbox-proxy',
+              `/dropbox-file/scl/fi/usa8me7ywgylrij2bt6hj/Data-Matrix.xlsx?rlkey=tsec8csrhye54u1fdvk15ped1&st=qbxxs4cn&dl=0&t=${Date.now()}`
+            ]
+          : [
+              '/api/dropbox-proxy'
+            ];
+
+        let lastError: unknown = null;
+        for (const source of dropboxSources) {
           try {
-            const response = await fetch(fileUrl, { cache: 'no-store' });
+            console.log(`Fetching Data-Matrix.xlsx from ${source.includes('/api/') ? 'proxy' : 'Dropbox'}...`);
-            if (!response.ok) throw new Error(`HTTP ${response.status}`);
+            const size = await loadWorkbookFromUrl(source);
-
+            fileMeta = { rev: source, size };
-            const contentType = response.headers.get('content-type');
+            lastError = null;
-            if (contentType && contentType.includes('text/html')) {
+            break;
-              throw new Error('Dropbox returned an HTML page instead of the Excel file.');
+          } catch (err) {
-            }
+            lastError = err;
-
+            console.warn(`Dropbox source failed for ${source}:`, err);
-            const arrayBuffer = await response.arrayBuffer();
-            if (arrayBuffer.byteLength < 100) throw new Error('File too small');
-
-            const wb = XLSX.read(arrayBuffer, { type: 'array' });
-            const wsname = wb.SheetNames[0];
-            const ws = wb.Sheets[wsname];
-            allData = XLSX.utils.sheet_to_json<any[]>(ws, { header: 1 });
-            rows = allData.slice(1);
-            fileMeta = { rev: 'dev', size: arrayBuffer.byteLength };
-          } catch (devErr) {
-            console.error('Dropbox dev load failed:', devErr);
-            throw devErr;
           }
-        } else {
+        }
-          console.log('Fetching file info from Dropbox...');
-          const infoRes = await fetch('/api/dropbox-proxy?info=1');
-          if (infoRes.ok) {
-            fileMeta = await infoRes.json();
-            console.log('File meta:', fileMeta);
-          }
-          
-          console.log('Fetching Data-Matrix.xlsx from proxy (hard refresh)...');
-          try {
-            const response = await fetch('/api/dropbox-proxy', { cache: 'no-store' });
-            if (!response.ok) throw new Error(`HTTP ${response.status}`);
 
-            const contentType = response.headers.get('content-type');
+        if (lastError) {
-            if (contentType && contentType.includes('text/html')) {
+          throw lastError instanceof Error ? lastError : new Error(String(lastError));
-              throw new Error('Dropbox returned an HTML page instead of the Excel file.');
-            }
-
-            const arrayBuffer = await response.arrayBuffer();
-            if (arrayBuffer.byteLength < 100) throw new Error('File too small');
-
-            const wb = XLSX.read(arrayBuffer, { type: 'array' });
-            const wsname = wb.SheetNames[0];
-            const ws = wb.Sheets[wsname];
-            allData = XLSX.utils.sheet_to_json<any[]>(ws, { header: 1 });
-            rows = allData.slice(1);
-          } catch (prodErr) {
-            console.error('Dropbox prod load failed:', prodErr);
-            throw prodErr;
-          }
         }
 
         if (rows.length > 0) {

vite.config.ts

@@ -31,6 +31,7 @@ async function readJsonBody(req: any): Promise<any> {
 
 export default defineConfig(({mode}) => {
   const env = loadEnv(mode, '.', '');
+  const prodEnv = loadEnv('production', '.', '');
   return {
     plugins: [
       react(),
@@ -44,7 +45,7 @@ export default defineConfig(({mode}) => {
               const config = getBcConfig(env);
 
               // Populate process.env with loaded env variables for serverless handlers
-              Object.assign(process.env, env);
+              Object.assign(process.env, prodEnv, env);
 
               // Helper to adapt Node.js req/res to Vercel signature
               const adaptVercelHandler = async (handler: any) => {