Add content hash to JS includes (closes #2714)

The CSS link in base.html already carries `?{{ app_css_hash }}` so that
browsers refetch when the bundled file changes. The five first-party JS
files shipped with datasette did not. Cache-busting JS the same way
matches the existing CSS pattern and uses the static_hash() helper that
already powers app_css_hash().

Files updated:
- datasette/app.py: expose static_hash as a callable in template context.
- datasette/handle_exception.py: include static_hash in the error-page
  template context (mirrors the existing app_css_hash entry there).
- datasette/templates/base.html: hash datasette-manager.js and
  navigation-search.js.
- datasette/templates/table.html: hash column-chooser.js, table.js, and
  mobile-column-actions.js.
- tests/test_html.py: new test_js_content_hash parametrized across all
  five files; existing test_navigation_menu_links updated to expect the
  new query string.

Vendored libraries (cm-editor-6.0.1.bundle.js, sql-formatter-2.3.3.min.js,
json-format-highlight-1.0.1.js) already carry a version in the filename
and were left unchanged.

datasette/app.py

@@ -2052,6 +2052,7 @@ class Datasette:
                 and "ds_actor" in request.cookies
                 and request.actor,
                 "app_css_hash": self.app_css_hash(),
+                "static_hash": self.static_hash,
                 "zip": zip,
                 "body_scripts": body_scripts,
                 "format_bytes": format_bytes,

datasette/handle_exception.py

@@ -67,6 +67,7 @@ def handle_exception(datasette, request, exception):
                         info,
                         urls=datasette.urls,
                         app_css_hash=datasette.app_css_hash(),
+                        static_hash=datasette.static_hash,
                         menu_links=lambda: [],
                     )
                 ),

datasette/templates/base.html

@@ -8,7 +8,7 @@
     <link rel="stylesheet" href="{{ url.url }}"{% if url.get("sri") %} integrity="{{ url.sri }}" crossorigin="anonymous"{% endif %}>
 {% endfor %}
 <script>window.datasetteVersion = '{{ datasette_version }}';</script>
-<script src="{{ urls.static('datasette-manager.js') }}" defer></script>
+<script src="{{ urls.static('datasette-manager.js') }}?{{ static_hash('datasette-manager.js') }}" defer></script>
 {% for url in extra_js_urls %}
     <script {% if url.module %}type="module" {% endif %}src="{{ url.url }}"{% if url.get("sri") %} integrity="{{ url.sri }}" crossorigin="anonymous"{% endif %}></script>
 {% endfor %}
@@ -70,7 +70,7 @@
 {% endfor %}
 
 {% if select_templates %}<!-- Templates considered: {{ select_templates|join(", ") }} -->{% endif %}
-<script src="{{ urls.static('navigation-search.js') }}" defer></script>
+<script src="{{ urls.static('navigation-search.js') }}?{{ static_hash('navigation-search.js') }}" defer></script>
 <navigation-search url="/-/jump"></navigation-search>
 </body>
 </html>

datasette/templates/table.html

@@ -4,9 +4,9 @@
 
 {% block extra_head %}
 {{- super() -}}
-<script src="{{ urls.static('column-chooser.js') }}" defer></script>
-<script src="{{ urls.static('table.js') }}" defer></script>
-<script src="{{ urls.static('mobile-column-actions.js') }}" defer></script>
+<script src="{{ urls.static('column-chooser.js') }}?{{ static_hash('column-chooser.js') }}" defer></script>
+<script src="{{ urls.static('table.js') }}?{{ static_hash('table.js') }}" defer></script>
+<script src="{{ urls.static('mobile-column-actions.js') }}?{{ static_hash('mobile-column-actions.js') }}" defer></script>
 <script>DATASETTE_ALLOW_FACET = {{ datasette_allow_facet }};</script>
 <style>
 @media only screen and (max-width: 576px) {

tests/test_html.py

@@ -604,6 +604,26 @@ async def test_404(ds_client, path):
     )
 
 
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "filename,template_path",
+    [
+        ("datasette-manager.js", "/"),
+        ("navigation-search.js", "/"),
+        ("table.js", "/fixtures/facetable"),
+        ("column-chooser.js", "/fixtures/facetable"),
+        ("mobile-column-actions.js", "/fixtures/facetable"),
+    ],
+)
+async def test_js_content_hash(ds_client, filename, template_path):
+    response = await ds_client.get(template_path)
+    assert response.status_code == 200
+    expected = (
+        f'<script src="/-/static/{filename}?{ds_client.ds.static_hash(filename)}"'
+    )
+    assert expected in response.text
+
+
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
     "path,expected_redirect",
@@ -1038,7 +1058,9 @@ async def test_navigation_menu_links(
     navigation_search_script = soup.find(
         "script", {"src": re.compile(r"navigation-search\.js")}
     )
-    assert navigation_search_script["src"] == "/-/static/navigation-search.js"
+    assert navigation_search_script["src"] == (
+        f"/-/static/navigation-search.js?{ds_client.ds.static_hash('navigation-search.js')}"
+    )
     assert details.find("li").find("button") == search_button
     if not actor_id:
         # The app menu is always visible, but anonymous users do not see logout