Fix cache initialization and add better error handling

- Initialize g.cache early to prevent undefined access errors
- Add detailed error handling for metadata.json parsing
- Prevent cascade failures when ZIP deployment fails
- Add JSON content preview for debugging parsing issues

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

pkgs/utils/deploy.ts

@@ -89,7 +89,7 @@ export const deploy = {
         throw new Error(`No deployment file found for timestamp: ${ts}`);
       }
 
-      if (g.deploy.content) {
+      // Initialize cache early to prevent undefined access errors
       console.log(`[DEBUG] Setting up cache and compression...`);
       g.cache = {
         br: {},
@@ -100,6 +100,8 @@ export const deploy = {
           timeout: null,
         },
       };
+
+      if (g.deploy.content) {
         startBrCompress();
         console.log(`[DEBUG] Compression started`);
 
@@ -273,7 +275,16 @@ export const deploy = {
           if (entry.filename === 'metadata.json') {
             console.log(`[DEBUG] Found metadata.json, parsing content...`);
             const metadataStr = new TextDecoder().decode(fileContent);
-            const metadata = JSON.parse(metadataStr);
+            let metadata;
+
+            try {
+              metadata = JSON.parse(metadataStr);
+              console.log(`[DEBUG] Successfully parsed metadata.json`);
+            } catch (jsonError) {
+              console.error(`[ERROR] Failed to parse metadata.json: ${jsonError.message}`);
+              console.error(`[ERROR] JSON content preview:`, metadataStr.substring(0, 200));
+              throw new Error(`Invalid JSON in metadata.json: ${jsonError.message}`);
+            }
 
             console.log(`[DEBUG] Parsed metadata:`, {
               layouts: metadata.layouts?.length || 0,