fix(web): add comic delete UI and fix container Cloudflare bypass for #6

- Add delete button (SVG X, hover-reveal) and confirmation modal to comic cards
- Add DELETE /api/comics/delete endpoint with path traversal protection
- Fix container downloads: delegate Cloudflare-blocked requests to FlareSolverr
  (headless Chrome sidecar) instead of retrying with Go HTTP client, whose Linux
  TCP fingerprint is flagged by Cloudflare even with network_mode: host
- Add FlareSolverr service to docker-compose; inject FLARESOLVERR_URL env var
- Add diagnostic logging to BatcaveBizMarkup request flow
- Trim URL whitespace before storing in download job
- Guard Archive() against empty filelist; fix runJob error-check ordering

docker-compose.yml

@@ -1,4 +1,8 @@
 services:
+  flaresolverr:
+    image: ghcr.io/flaresolverr/flaresolverr:latest
+    restart: unless-stopped
+
   yoink:
     build: .
     ports:
@@ -7,4 +11,7 @@ services:
       - ./library:/library
     environment:
       - YOINK_LIBRARY=/library
+      - FLARESOLVERR_URL=http://flaresolverr:8191
     restart: unless-stopped
+    depends_on:
+      - flaresolverr