palette tooltip: contextual description per lock state; earned date below Unlocked in green — TDD

- _palettes_for_user: shoptalk→description; "available by default" / "explore to unlock" / "recognized via {Title}"; unlocked_date key carries earned_at ISO for Note-unlocked
- template: data-shoptalk→data-description; data-unlocked-date now holds ISO datetime (was literal "Default")
- dashboard.js: lockText drops "— Default"; dateLine renders "Apr 22, 2026 · 3:05 AM" after Unlocked line
- _palette-picker.scss: tt-shoptalk→tt-description in display:block list; tt-date added
- _tooltips.scss: .tt-date mirrors .tt-expiry w. --priGn colour

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Sonnet 4.6 <noreply@anthropic.com>

src/apps/dashboard/tests/integrated/test_views.py

@@ -358,7 +358,7 @@ class NotePaletteContextTest(TestCase):
         bardo = next(p for p in palettes if p["name"] == "palette-bardo")
         self.assertFalse(bardo["locked"])
 
-    def test_note_palette_shoptalk_contains_note_title(self):
+    def test_note_palette_description_contains_note_title(self):
         Note.objects.create(
             user=self.user, slug="stargazer", earned_at=timezone.now(),
             palette="palette-bardo",
@@ -366,7 +366,41 @@ class NotePaletteContextTest(TestCase):
         response = self.client.get("/")
         palettes = response.context["palettes"]
         bardo = next(p for p in palettes if p["name"] == "palette-bardo")
-        self.assertIn("Stargazer", bardo["shoptalk"])
+        self.assertIn("Stargazer", bardo["description"])
+
+    def test_default_palette_description_is_available_by_default(self):
+        response = self.client.get("/")
+        palettes = response.context["palettes"]
+        default = next(p for p in palettes if p["name"] == "palette-default")
+        self.assertEqual(default["description"], "available by default")
+
+    def test_locked_palette_description_is_explore_to_unlock(self):
+        response = self.client.get("/")
+        palettes = response.context["palettes"]
+        bardo = next(p for p in palettes if p["name"] == "palette-bardo")
+        self.assertEqual(bardo["description"], "explore to unlock")
+
+    def test_note_palette_description_is_recognized_via(self):
+        Note.objects.create(
+            user=self.user, slug="stargazer", earned_at=timezone.now(),
+            palette="palette-bardo",
+        )
+        response = self.client.get("/")
+        palettes = response.context["palettes"]
+        bardo = next(p for p in palettes if p["name"] == "palette-bardo")
+        self.assertEqual(bardo["description"], "recognized via Stargazer")
+
+    def test_note_palette_entry_includes_unlocked_date_iso(self):
+        earned = timezone.now()
+        Note.objects.create(
+            user=self.user, slug="stargazer", earned_at=earned,
+            palette="palette-bardo",
+        )
+        response = self.client.get("/")
+        palettes = response.context["palettes"]
+        bardo = next(p for p in palettes if p["name"] == "palette-bardo")
+        self.assertIn("unlocked_date", bardo)
+        self.assertEqual(bardo["unlocked_date"], earned.isoformat())
 
     def test_note_without_palette_field_keeps_swatch_locked(self):
         Note.objects.create(