many styling changes to applets and palettes applet esp.; all applets seeded w. < 3rows bumped to 3 w. new migration in apps.applets; setting palette no longer reloads entire page, only preset background-color vars; two new ITs in apps.dash.tests.ITs.test_views.SetPaletteTest to ensure dash.views functionality fires; unified h2 applet title html structure & styled its text vertically to waste less applet space

src/functional_tests/test_applet_palette.py

@@ -1,10 +1,49 @@
 from selenium.webdriver.common.by import By
 
+from apps.applets.models import Applet
 from apps.lyric.models import User
 
 from .base import FunctionalTest
 
 
+class PaletteSwapTest(FunctionalTest):
+    def test_selecting_palette_updates_body_class_without_page_reload(self):
+        Applet.objects.get_or_create(slug="palette", defaults={
+            "name": "Palette", "context": "dashboard",
+        })
+        user, _ = User.objects.get_or_create(email="swap@test.io")
+        self.create_pre_authenticated_session("swap@test.io")
+        self.browser.get(self.live_server_url)
+
+        body = self.browser.find_element(By.TAG_NAME, "body")
+        self.assertIn("palette-default", body.get_attribute("class"))
+
+        # Mark the window — this survives JS execution but is wiped on a real reload
+        self.browser.execute_script("window._no_reload_marker = true;")
+
+        # Click OK on a non-active palette
+        btn = self.wait_for(
+            lambda: self.browser.find_element(
+                By.CSS_SELECTOR,
+                ".palette-item:has(.swatch:not(.active)) .btn-confirm",
+            )
+        )
+        btn.click()
+
+        # Body palette class swaps without reload
+        self.wait_for(
+            lambda: self.assertNotIn(
+                "palette-default",
+                self.browser.find_element(By.TAG_NAME, "body").get_attribute("class"),
+            )
+        )
+
+        # Marker still present — no full page reload occurred
+        self.assertTrue(
+            self.browser.execute_script("return window._no_reload_marker === true;")
+        )
+
+
 class SiteThemeTest(FunctionalTest):
     def test_page_renders_with_earthman_palette(self):
         self.browser.get(self.live_server_url)