ci: remove just from Linux workflows, drop redundant scraper build job, consolidate to Docker Hub

.gitea/workflows/ci-ui.yaml

@@ -2,16 +2,14 @@ name: CI / UI
 
 on:
   push:
-    branches: ["main", "master"]
+    branches: ["main", "master", "v2"]
     paths:
       - "ui/**"
-      - "justfile"
       - ".gitea/workflows/ci-ui.yaml"
   pull_request:
-    branches: ["main", "master"]
+    branches: ["main", "master", "v2"]
     paths:
       - "ui/**"
-      - "justfile"
       - ".gitea/workflows/ci-ui.yaml"
 
 concurrency:
@@ -23,6 +21,9 @@ jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ui
     steps:
       - uses: actions/checkout@v4
 
@@ -32,17 +33,14 @@ jobs:
           cache: npm
           cache-dependency-path: ui/package-lock.json
 
-      - name: Install just
-        run: curl --proto '=https' --tlsv1.2 -sSf https://just.systems/install.sh | bash -s -- --to /usr/local/bin
-
       - name: Install dependencies
-        run: just ui-install
+        run: npm ci
 
       - name: Type check
-        run: just ui-check
+        run: npm run check
 
       - name: Build
-        run: just ui-build
+        run: npm run build
 
   # ── push to Docker Hub ───────────────────────────────────────────────────────
   docker: