fix: percent-encode X-File-Results header for non-ASCII filenames (#133)

Closes #133

apps/api/src/openapi.yaml

@@ -4470,7 +4470,7 @@ paths:
             X-File-Results:
               schema:
                 type: string
-              description: JSON mapping of input index to output filename
+              description: Percent-encoded JSON mapping of input index to output filename (decode with decodeURIComponent before JSON.parse)
           content:
             application/zip:
               schema:

apps/api/src/routes/batch.ts

@@ -262,7 +262,7 @@ export async function registerBatchRoutes(app: FastifyInstance): Promise<void> {
         "Content-Disposition": `attachment; filename="batch-${toolId}-${jobId.slice(0, 8)}.zip"`,
         "Transfer-Encoding": "chunked",
         "X-Job-Id": jobId,
-        "X-File-Results": JSON.stringify(fileResultsMap),
+        "X-File-Results": encodeURIComponent(JSON.stringify(fileResultsMap)),
       });
 
       const archive = archiver("zip", { zlib: { level: 5 } });

apps/api/src/routes/pipeline.ts

@@ -731,7 +731,7 @@ export async function registerPipelineRoutes(app: FastifyInstance): Promise<void
       "Content-Disposition": `attachment; filename="pipeline-batch-${jobId.slice(0, 8)}.zip"`,
       "Transfer-Encoding": "chunked",
       "X-Job-Id": jobId,
-      "X-File-Results": JSON.stringify(fileResultsMap),
+      "X-File-Results": encodeURIComponent(JSON.stringify(fileResultsMap)),
     });
 
     const archive = archiver("zip", { zlib: { level: 5 } });

apps/api/src/routes/tools/svg-to-raster.ts

@@ -320,7 +320,7 @@ export function registerSvgToRaster(app: FastifyInstance) {
       "Content-Disposition": `attachment; filename="batch-svg-to-raster-${jobId.slice(0, 8)}.zip"`,
       "Transfer-Encoding": "chunked",
       "X-Job-Id": jobId,
-      "X-File-Results": JSON.stringify(fileResultsMap),
+      "X-File-Results": encodeURIComponent(JSON.stringify(fileResultsMap)),
     });
 
     const archive = archiver("zip", { zlib: { level: 5 } });

apps/web/src/hooks/use-pipeline-processor.ts

@@ -330,7 +330,9 @@ export function usePipelineProcessor() {
         const entries = useFileStore.getState().entries;
         let fileResults: Record<string, string> = {};
         try {
-          fileResults = JSON.parse(response.headers.get("X-File-Results") ?? "{}");
+          fileResults = JSON.parse(
+            decodeURIComponent(response.headers.get("X-File-Results") ?? "%7B%7D"),
+          );
         } catch {
           // Malformed header - fall back to empty mapping, all entries marked failed
         }

apps/web/src/hooks/use-tool-processor.ts

@@ -384,7 +384,9 @@ export function useToolProcessor(toolId: string) {
         const entries = useFileStore.getState().entries;
         let fileResults: Record<string, string> = {};
         try {
-          fileResults = JSON.parse(response.headers.get("X-File-Results") ?? "{}");
+          fileResults = JSON.parse(
+            decodeURIComponent(response.headers.get("X-File-Results") ?? "%7B%7D"),
+          );
         } catch {
           // Malformed header - fall back to empty mapping, all entries marked failed
         }