fix(ci): stabilize rc releases and version flatpak artifact

cx

packaging/flatpak/com.blitzfc.qbz.yml

@@ -5,6 +5,7 @@ sdk: org.gnome.Sdk
 sdk-extensions:
   - org.freedesktop.Sdk.Extension.node20
   - org.freedesktop.Sdk.Extension.rust-stable
+  - org.freedesktop.Sdk.Extension.llvm20
 command: qbz
 finish-args:
   - --share=ipc
@@ -131,11 +132,12 @@ modules:
   - name: qbz
     buildsystem: simple
     build-options:
-      append-path: /usr/lib/sdk/node20/bin:/usr/lib/sdk/rust-stable/bin
+      append-path: /usr/lib/sdk/node20/bin:/usr/lib/sdk/rust-stable/bin:/usr/lib/sdk/llvm20/bin
       build-args:
         - --share=network
       env:
         npm_config_nodedir: /usr/lib/sdk/node20
+        LIBCLANG_PATH: /usr/lib/sdk/llvm20/lib
     build-commands:
       - npm ci
       - export PATH="$PWD/node_modules/.bin:$PATH" && npm run build