diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index c766548..5fb7c07 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -20,37 +20,61 @@ jobs:
             python3 \
             py3-pip \
             rust
+          apk add --no-cache qt6-qtdeclarative-dev-tools || \
+          apk add --no-cache qt6-qtdeclarative-dev || \
+          apk add --no-cache qt6-qtdeclarative || \
+          echo "::warning::qmllint not available"
 
-      - name: Python sanity check
+      - name: Python lint
         run: |
-          python3 --version
           python3 -m venv .venv
           . .venv/bin/activate
           pip install --no-cache-dir ruff
-          ruff check . || true
+          if ! ruff check .; then
+            echo "::warning::ruff reported issues"
+          fi
 
-      - name: JS sanity check
+      - name: JS lint
         run: |
-          node --version
-          npm --version
           if [ -f package.json ]; then
-            npm install --no-audit --no-fund || true
-            npx eslint . || true
+            npm install --no-audit --no-fund
+            if ! npx eslint .; then
+              echo "::warning::eslint reported issues"
+            fi
           else
             echo "No JS project found"
           fi
 
-      - name: Rust sanity check
+      - name: JS format (prettier)
+        run: |
+          if [ -f package.json ]; then
+            if ! npx --yes prettier --check "**/*.{js,jsx,ts,tsx,mjs,cjs}" --ignore-path .gitignore; then
+              echo "::warning::prettier reported issues"
+            fi
+          else
+            echo "No JS project found"
+          fi
+
+      - name: Rust lint
         run: |
-          rustc --version
           if [ -f Cargo.toml ]; then
-            cargo check || true
-            cargo fmt --check || true
+            if ! cargo fmt --check; then
+              echo "::warning::rustfmt reported issues"
+            fi
           else
             echo "No Rust project found"
           fi
 
-      - name: QML sanity check
+      - name: QML lint
         run: |
-          echo "QML check (placeholder)"
-          find . -name "*.qml" | head -n 20
+          if command -v qmllint >/dev/null 2>&1; then
+            if [ -n "$(find . -name "*.qml" -print -quit)" ]; then
+              if ! find . -name "*.qml" -print0 | xargs -0 qmllint; then
+                echo "::warning::qmllint reported issues"
+              fi
+            else
+              echo "No QML files found"
+            fi
+          else
+            echo "No qmllint in PATH"
+          fi
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..19ffb91
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,13 @@
+{
+    "semi": true,
+    "singleQuote": true,
+    "jsxSingleQuote": false,
+    "tabWidth": 4,
+    "printWidth": 100,
+    "trailingComma": "es5",
+    "bracketSpacing": true,
+    "bracketSameLine": false,
+    "arrowParens": "always",
+    "endOfLine": "lf",
+    "proseWrap": "preserve"
+}