Fix feed validation output

tests/test_web.py

@@ -22,6 +22,7 @@ from repub.model import (
     SourcePangea,
     create_source,
     load_max_concurrent_jobs,
+    load_settings_form,
     save_setting,
 )
 from repub.pages.runs import runs_page
@@ -861,6 +862,7 @@ def test_render_settings_shows_current_max_concurrent_jobs(
     monkeypatch.setenv("REPUBLISHER_DB_PATH", str(db_path))
     create_app()
     save_setting("max_concurrent_jobs", 3)
+    save_setting("feed_url", "https://mirror.example")
 
     async def run() -> None:
         app = create_app()
@@ -869,7 +871,11 @@ def test_render_settings_shows_current_max_concurrent_jobs(
         assert ">Settings<" in body
         assert "/actions/settings" in body
         assert 'value="3"' in body
+        assert 'value="https://mirror.example"' in body
         assert "Max concurrent jobs" in body
+        assert "Feed URL" in body
+        assert "Example: http://localhost:8080" in body
+        assert "Must include http:// or https://" in body
         assert 'type="submit"' in body
         assert "cursor-pointer" in body
 
@@ -1208,13 +1214,17 @@ def test_settings_action_updates_max_concurrent_jobs(
         response = await client.post(
             "/actions/settings",
             headers={"Datastar-Request": "true"},
-            json={"maxConcurrentJobs": "3"},
+            json={
+                "maxConcurrentJobs": "3",
+                "feedUrl": "https://mirror.example",
+            },
         )
         body = await response.get_data(as_text=True)
 
         assert response.status_code == 200
         assert "window.location = '/settings'" in body
         assert load_max_concurrent_jobs() == 3
+        assert load_settings_form()["feed_url"] == "https://mirror.example"
         assert 'value="3"' in str(await render_settings(app))
 
     asyncio.run(run())
@@ -1233,7 +1243,7 @@ def test_settings_action_rejects_non_positive_max_concurrent_jobs(
         response = await client.post(
             "/actions/settings",
             headers={"Datastar-Request": "true"},
-            json={"maxConcurrentJobs": "0"},
+            json={"maxConcurrentJobs": "0", "feedUrl": "https://mirror.example"},
         )
         body = await response.get_data(as_text=True)
 
@@ -1244,6 +1254,28 @@ def test_settings_action_rejects_non_positive_max_concurrent_jobs(
     asyncio.run(run())
 
 
+def test_settings_action_rejects_invalid_feed_url(monkeypatch, tmp_path: Path) -> None:
+    db_path = tmp_path / "settings-invalid-url.db"
+    monkeypatch.setenv("REPUBLISHER_DB_PATH", str(db_path))
+
+    async def run() -> None:
+        app = create_app()
+        client = app.test_client()
+
+        response = await client.post(
+            "/actions/settings",
+            headers={"Datastar-Request": "true"},
+            json={"maxConcurrentJobs": "2", "feedUrl": "mirror.example"},
+        )
+        body = await response.get_data(as_text=True)
+
+        assert response.status_code == 200
+        assert "Feed URL must be a valid URL." in body
+        assert load_settings_form()["feed_url"] == ""
+
+    asyncio.run(run())
+
+
 def test_render_runs_shows_running_scheduled_and_completed_tables(
     monkeypatch, tmp_path: Path
 ) -> None: