webui: Move static build output from repo code to HF Bucket (#22937)

* ci: add workflow to publish webui to Hugging Face bucket

* ci: add webui release job to release workflow

* ci: test webui release job

* chore: Return to default minification strategy for build output files

* ci: extract webui build into separate workflow and job

* chore: Ignore webui static output + clean up references

* chore: Delete legacy webui static output

* chore: Ignore webui build static output

* fix: Workflow

* fix: Versioning naming

* chore: Update package name

* test: Test CI fix

* refactor: Naming

* server: implement webui build strategy with HF Bucket support

* chore: Remove test workflow

* chore: Use WebUI build workflow call in other workflows

* server: HF Buckets fallback for WebUI build

* refactor: App name variable

* refactor: Naming

* fix: Retrieve loading.html

* fix: workflow syntax

* fix: Rewrite malformed release.yml

* fix: Req param

* test: Re-add missing Playwright installation for CI tests

* refactor: Logic & security improvements

* refactor: Retrieve publishing jobs and DRY the workflows

* fix: Test workflow syntax

* fix: Upstream Release Tag for test workflow

* chore: Remove test workflow

* ci: Run WebUI jobs on `ubuntu-24.04-arm`

* refactor: Post-CR cleanup

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
Co-authored-by: Aleksander Grygier <aleksander.grygier@gmail.com>

* refactor: CI cleanup

* refactor: Cleanup

* test: Test workflow

* refactor: use LLAMA_BUILD_NUMBER instead of LLAMA_BUILD_TAG for HF Bucket webui downloads

* server: add fallback mechanism for HF Bucket webui downloads from latest directory

* fix: Incorrect argument order in file(SHA256) calls for checksum verification

* refactor: Use cmake script for handling the HF Bucket download on build time

* feat: support local npm build for WebUI assets

* refactor: add `HF_ENABLED` flag to control WebUI build/download provisioning

* refactor: Cleanup

* chore: Remove test workflow

* fix: remove s390x from release workflow

* fix: add webui-build dependency to ubuntu-22-rocm and windows-hip

* Revert "fix: remove s390x from release workflow"

This reverts commit debcfffa9bc1e3112eae41f2d29741b682e4eb19.

* fix: Release workflow file

* fix: Proper release tag used for HF Bucket upload

* fix: Remove duplicate steps in release workflow

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

.github/workflows/server.yml

@@ -54,7 +54,12 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  webui-build:
+    name: Build WebUI
+    uses: ./.github/workflows/webui-build.yml
+
   server:
+    needs: webui-build
     runs-on: ubuntu-latest
 
     name: server (${{ matrix.wf_name }})
@@ -93,6 +98,12 @@ jobs:
           fetch-depth: 0
           ref: ${{ github.event.inputs.sha || github.event.pull_request.head.sha || github.sha || github.head_ref || github.ref_name }}
 
+      - name: Download WebUI build artifact
+        uses: actions/download-artifact@v7
+        with:
+          name: webui-build
+          path: tools/server/public/
+
       - name: Build
         id: cmake_build
         run: |
@@ -125,6 +136,7 @@ jobs:
           SLOW_TESTS=1 pytest -v -x
 
   server-windows:
+    needs: webui-build
     runs-on: windows-2022
 
     steps:
@@ -135,6 +147,12 @@ jobs:
           fetch-depth: 0
           ref: ${{ github.event.inputs.sha || github.event.pull_request.head.sha || github.sha || github.head_ref || github.ref_name }}
 
+      - name: Download WebUI build artifact
+        uses: actions/download-artifact@v7
+        with:
+          name: webui-build
+          path: tools/server/public/
+
       - name: Build
         id: cmake_build
         run: |