feat(api,web): add batch processing with ZIP download and SSE progress

Backend: POST /api/v1/tools/:toolId/batch accepts multiple files +
settings, processes via p-queue with CONCURRENT_JOBS concurrency limit,
streams ZIP response using archiver. Tool registry in tool-factory
enables batch to reuse any registered tool's process function. SSE
endpoint at GET /api/v1/jobs/:jobId/progress provides real-time updates.
Handles partial failures gracefully, preserves filenames, deduplicates
collisions. Frontend: use-batch-processor hook handles upload, SSE
progress tracking, and automatic ZIP download.

apps/api/src/routes/tool-factory.ts

@@ -19,6 +19,21 @@ export interface ToolRouteConfig<T> {
   ) => Promise<{ buffer: Buffer; filename: string; contentType: string }>;
 }
 
+/**
+ * In-memory registry of all tool configs, keyed by toolId.
+ * Populated by createToolRoute() calls; used by batch processing.
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+const toolRegistry = new Map<string, ToolRouteConfig<any>>();
+
+/**
+ * Retrieve a registered tool config by its ID.
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function getToolConfig(toolId: string): ToolRouteConfig<any> | undefined {
+  return toolRegistry.get(toolId);
+}
+
 /**
  * Sanitize a filename to prevent path traversal attacks.
  */
@@ -51,6 +66,9 @@ export function createToolRoute<T>(
   app: FastifyInstance,
   config: ToolRouteConfig<T>,
 ): void {
+  // Register in the tool registry for batch processing
+  toolRegistry.set(config.toolId, config);
+
   app.post(
     `/api/v1/tools/${config.toolId}`,
     async (request: FastifyRequest, reply: FastifyReply) => {