Add catatonit/nftables/docker-compose packages, fix CSRF/streaming/storage bugs found by live testing

- Package #9-11: catatonit (pod infra init), nftables (netavark firewall
  backend), docker-compose (external compose provider for `podman compose`)
  — all vendored prebuilt binaries, versions.env pinned, propagated through
  build-packages.sh/release.sh/podman.plg/verify+update-packages.sh.
- Fix WebUI: every POST action was silently failing (empty response body)
  because Unraid's own CSRF protection was never satisfied — app.js now
  sends the page's csrf_token as X-CSRF-Token.
- Fix WebUI: PodmanClient::pullImage() assumed a single JSON response, but
  /images/pull actually streams newline-delimited JSON — every successful
  pull was throwing "Expected a JSON object/array response".
- Fix WebUI: compose.php's up/down status detection had the same
  single-JSON-vs-NDJSON bug for `podman compose ps`, plus stderr was
  corrupting the parse.
- Add cache-busting (?v=<mtime>) to Podman.page's script/style tags so a
  redeployed JS/CSS fix isn't served stale from browser cache.
- Add a reusable modal dialog (app.js openFormModal) replacing
  prompt()/alert() for New Volume/Network/Pull Image.
- Add host-path (bind-mount) support when creating a named volume.
- Add Create Container (image, name, network mode incl. custom networks,
  ports, volumes, env, restart policy, privileged, start-after-create),
  auto-pulling the image on first use since /containers/create doesn't.

All fixes verified live against a real podman system service and, where
reachable, via the actual WebUI over the real socket — not just unit-level.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.github/workflows/build-packages.yml

@@ -1,9 +1,10 @@
 name: Build Packages
 
-# Builds the seven Slackware .txz packages defined under packages/
-# (podman, conmon, crun, netavark, aardvark-dns, passt, fuse-overlayfs)
-# inside a Slackware container, verifies + consolidates their checksums, and
-# uploads the result as a workflow artifact.
+# Builds the eleven Slackware .txz packages defined under packages/
+# (podman, conmon, crun, netavark, aardvark-dns, passt, fuse-overlayfs,
+# catatonit, nftables, docker-compose, unraid-podman) inside a Slackware
+# container, verifies + consolidates their checksums, and uploads the
+# result as a workflow artifact.
 #
 # Intentionally does NOT commit any built binary back to the repository —
 # packages/**, *.txz, dist/ are all git-ignored (see .gitignore). Artifacts
@@ -31,7 +32,7 @@ on:
     inputs:
       packages:
         description: >
-          Space-separated package names to build (default: all seven).
+          Space-separated package names to build (default: all eleven).
           Example: "podman conmon"
         required: false
         default: ""