chore(ci): update CI to run more less often and more efficient

.github/workflows/browser-testing.yml

@@ -1,3 +1,10 @@
+# This workflow runs browser-based tests using Cypress
+# Triggers:
+#   - Push/PR with web or browser test changes
+# Skips:
+#   - Documentation-only changes in web/
+#   - Configuration-only changes
+
 name: Browser Tests
 
 on:
@@ -30,11 +37,27 @@ jobs:
         uses: actions/checkout@v5
         if: github.event_name == 'push'
 
+      - name: Get changed files
+        id: changed-files-yaml
+        uses: tj-actions/changed-files@v46
+        with:
+          files_yaml: |
+            testable:
+              - 'web/**/*.{tsx,ts,jsx,js,css,scss}'
+              - 'test/automated/browser/**'
+              - '**/*.go'
+              - 'go.mod'
+              - 'go.sum'
+            docs:
+              - '**/*.md'
+
       - uses: actions/setup-node@v4
+        if: steps.changed-files-yaml.outputs.testable_any_changed == 'true'
         with:
           node-version: '22.18.0'
 
       - name: Cache node modules
+        if: steps.changed-files-yaml.outputs.testable_any_changed == 'true'
         uses: actions/cache@v4
         env:
           cache-name: cache-node-modules-browser-tests
@@ -47,14 +70,17 @@ jobs:
             ${{ runner.os }}-
 
       - uses: actions/setup-go@v5
+        if: steps.changed-files-yaml.outputs.testable_any_changed == 'true'
         with:
           go-version: '1.24'
           cache: true
 
       - name: Install Google Chrome
+        if: steps.changed-files-yaml.outputs.testable_any_changed == 'true'
         run: sudo apt-get update && sudo apt-get install google-chrome-stable
 
       - name: Run Browser tests
+        if: steps.changed-files-yaml.outputs.testable_any_changed == 'true'
         uses: nick-fields/retry@v3
         with:
           timeout_minutes: 20