buddies sprint phase 1: User.buddies M2M(self,symm=False) + my_buddies aperture page + add_buddy JSON endpoint + buddy btn slide-out — TDD; My Contacts applet renamed → My Buddies (slug + name + partial)

- lyric/0004 adds User.buddies = ManyToManyField('self', symmetrical=False, blank=True, related_name='added_as_buddy'). Asymmetric one-way add: A.buddies.add(B) doesn't reciprocate. Reverse via B.added_as_buddy.all() — load-bearing for the future "buddy changed username" snapshot-accept flow noted in design.
  - applets/0006 renames slug my-contacts → my-buddies + name 'Contacts' → 'My Buddies'. Existing migrations 0003/0004 untouched (historical artifacts).
  - billboard.views.my_buddies + add_buddy:
    • my_buddies: GET /billboard/my-buddies/ → renders the aperture page with request.user.buddies.all().
    • add_buddy: POST /billboard/buddies/add → JSON {buddy: {id, username, email}|null}. Privacy: returns null when email isn't a registered User OR is the requester's own; never leaks membership. Idempotent on re-add (M2M dedup).
  - templates:
    • _applet-my-contacts.html → _applet-my-buddies.html (heading + link to /billboard/my-buddies/).
    • my_buddies.html — bottom-anchored aperture list of buddies w. {% empty %} fallback "No buddies yet."
    • _buddy_add_panel.html — bottom-left handshake btn + slide-out, mirrors _buddy_panel.html (post share) but POSTs to add_buddy and appends to #id_buddies_list. Skips append if data-buddy-id already in DOM (race-safe). Drops the .buddy-entry--empty row on first add.
  - SCSS: page-billbuddies joins the body-class aperture trio; .buddies-page extends %billboard-page-base + flex-column + bottom-anchor for #id_buddies_list. id_applet_my_contacts → id_applet_my_buddies (test references + grid placement).
  - tests: new test_buddies.py — 14 ITs covering UserBuddiesM2MTest (asymmetric, idempotent), MyBuddiesViewTest (lists own buddies only, anon redirect), AddBuddyViewTest (registered/unregistered/self/idempotent/email-fallback/405). Existing test_views/test_billboard/test_game_kit references swapped to my-buddies. New test_my_buddies.py FT — 4 tests: pre-existing buddies render, empty state, add via panel appends entry w. username, unregistered silent no-op.
  - 841 ITs (+14) + 4 my_buddies FTs green.

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/functional_tests/test_billboard.py

@@ -26,7 +26,7 @@ class BillboardScrollTest(FunctionalTest):
         super().setUp()
         for slug, name, cols, rows in [
             ("my-scrolls",         "My Scrolls",         4, 3),
-            ("my-contacts",        "Contacts",           4, 3),
+            ("my-buddies",         "My Buddies",         4, 3),
             ("most-recent-scroll", "Most Recent Scroll", 8, 6),
         ]:
             Applet.objects.get_or_create(
@@ -193,7 +193,7 @@ class BillscrollPositionTest(FunctionalTest):
 class BillboardAppletsTest(FunctionalTest):
     """
     FT: billboard page renders three applets in the grid — My Scrolls,
-    My Contacts, and Most Recent Scroll — with a functioning gear menu.
+    My Buddies, and Most Recent Scroll — with a functioning gear menu.
     """
 
     def setUp(self):
@@ -203,7 +203,7 @@ class BillboardAppletsTest(FunctionalTest):
         self.room = Room.objects.create(name="Arcane Assembly", owner=self.founder)
         for slug, name, cols, rows in [
             ("my-scrolls",         "My Scrolls",         4, 3),
-            ("my-contacts",        "Contacts",           4, 3),
+            ("my-buddies",         "My Buddies",         4, 3),
             ("most-recent-scroll", "Most Recent Scroll", 8, 6),
         ]:
             Applet.objects.get_or_create(
@@ -219,7 +219,7 @@ class BillboardAppletsTest(FunctionalTest):
         self.wait_for(
             lambda: self.browser.find_element(By.ID, "id_applet_my_scrolls")
         )
-        self.browser.find_element(By.ID, "id_applet_my_contacts")
+        self.browser.find_element(By.ID, "id_applet_my_buddies")
         self.browser.find_element(By.ID, "id_applet_most_recent_scroll")
 
     def test_billboard_my_scrolls_lists_rooms(self):
@@ -278,7 +278,7 @@ class BillboardAppletsTest(FunctionalTest):
             lambda: self.browser.find_element(By.ID, "id_billboard_applet_menu")
         )
         contacts_cb = menu.find_element(
-            By.CSS_SELECTOR, "input[value='my-contacts']"
+            By.CSS_SELECTOR, "input[value='my-buddies']"
         )
         self.browser.execute_script("arguments[0].click()", contacts_cb)
         menu.find_element(By.CSS_SELECTOR, "button[type='submit']").click()
@@ -286,7 +286,7 @@ class BillboardAppletsTest(FunctionalTest):
         # Contacts is hidden; Most Recent Scroll + My Scrolls keep their content (bug #2)
         self.wait_for(
             lambda: self.assertEqual(
-                self.browser.find_elements(By.ID, "id_applet_my_contacts"),
+                self.browser.find_elements(By.ID, "id_applet_my_buddies"),
                 [],
             )
         )
@@ -305,7 +305,7 @@ class BillboardAppletsTest(FunctionalTest):
         )
         # The freshly-rendered menu must reflect DB state (Contacts unchecked)
         contacts_cb = menu.find_element(
-            By.CSS_SELECTOR, "input[value='my-contacts']"
+            By.CSS_SELECTOR, "input[value='my-buddies']"
         )
         self.assertFalse(contacts_cb.is_selected())
         most_recent_scroll_cb = menu.find_element(
@@ -322,7 +322,7 @@ class BillboardAppletsTest(FunctionalTest):
             )
         )
         self.assertEqual(
-            self.browser.find_elements(By.ID, "id_applet_my_contacts"),
+            self.browser.find_elements(By.ID, "id_applet_my_buddies"),
             [],
         )
 
@@ -332,7 +332,7 @@ class BillboardAppletsTest(FunctionalTest):
             lambda: self.browser.find_element(By.ID, "id_applet_my_scrolls")
         )
         self.assertEqual(
-            self.browser.find_elements(By.ID, "id_applet_my_contacts"),
+            self.browser.find_elements(By.ID, "id_applet_my_buddies"),
             [],
         )
         self.assertEqual(