buddy btn sprint: banner-anchor + window.Brief fix lands the last red FT — 16/16 buddy + 12 share/jasmine/my_notes + 818 IT regression — TDD

Two small fixes close out the OK→banner gap:

1. Anchor over h2: base.html drops <div id="id_brief_banner_anchor"></div> right before {% block content %} (after the messages block). note.js's showBanner now prefers the explicit anchor over the first <h2> — keeps the banner in the visible content flow on pages where the first h2 is position:absolute (post.html's rotated navbar header was the immediate motivator; sky.html's rotated h2 is the same shape, so this catches that pre-emptively too).
2. window.Brief explicit assignment: const Brief = (...) at script-tag scope is reachable as a bare name but does NOT auto-attach to window. The buddy panel's OK handler gates banner reveal on `if (window.Brief && data.brief)` — that gate was always false, so Brief.showBanner never fired on share-OK even though the chip + Line append in DOM proved the fetch.then() was running. Explicit window.Brief = Brief; window.Note = Note; in note.js (post-IIFE) closes the gap.

Also picks up the deferred page-object update — functional_tests.post_page.PostPage.share_post_with() now drives the buddy-btn flow (click #id_buddy_btn → type → click #id_buddy_panel .btn.btn-confirm → wait for recipient chip), so legacy SharingTest exercises the new pipeline end-to-end.

NoteSpec.js T10 split into T10a/T10b: a covers the anchor-preferred path, b covers the <h2> fallback.

16/16 buddy FTs green (previously 15/16). 12/12 sharing + Jasmine + my_notes FTs green. 818-test IT sweep green.

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

src/apps/dashboard/static/apps/dashboard/note.js

@@ -44,9 +44,15 @@ const Brief = (() => {
             banner.remove();
         });
 
-        var h2 = document.querySelector('h2');
-        if (h2 && h2.parentNode) {
-            h2.parentNode.insertBefore(banner, h2.nextSibling);
+        // Prefer the explicit anchor (set in base.html under the messages
+        // block, before {% block content %}) — keeps the banner in the
+        // visible content flow on pages where the first <h2> is
+        // position:absolute (e.g. post.html's rotated navbar header).
+        // Falls back to <h2> for pages that pre-date the anchor.
+        var anchor = document.getElementById('id_brief_banner_anchor')
+                  || document.querySelector('h2');
+        if (anchor && anchor.parentNode) {
+            anchor.parentNode.insertBefore(banner, anchor.nextSibling);
         } else {
             document.body.insertBefore(banner, document.body.firstChild);
         }
@@ -67,3 +73,9 @@ const Brief = (() => {
 
 // Backwards-compat shim — to be removed once the codebase uniformly uses Brief.
 const Note = Brief;
+
+// `const Brief = (...)` at script-tag scope is reachable as a bare name but
+// is NOT auto-attached to window — explicit assignment so callers that gate
+// on `if (window.Brief)` (e.g. _buddy_panel.html's OK handler) succeed.
+window.Brief = Brief;
+window.Note  = Note;

src/functional_tests/post_page.py

@@ -40,8 +40,19 @@ class PostPage:
         )
 
     def share_post_with(self, email):
-        self.get_share_box().send_keys(email)
-        self.get_share_box().send_keys(Keys.ENTER)
+        # Buddy-btn flow (post-Brief sprint): click bottom-left handshake,
+        # type the email in the slide-out, click the .btn-confirm OK, wait
+        # for the recipient chip.
+        buddy_btn = self.test.browser.find_element(By.ID, "id_buddy_btn")
+        buddy_btn.click()
+        recipient = self.test.wait_for(
+            lambda: self.test.browser.find_element(By.ID, "id_recipient")
+        )
+        recipient.send_keys(email)
+        ok = self.test.browser.find_element(
+            By.CSS_SELECTOR, "#id_buddy_panel .btn.btn-confirm"
+        )
+        ok.click()
         self.test.wait_for(
             lambda: self.test.assertIn(
                 email, [item.text for item in self.get_shared_with_list()]

src/static/tests/NoteSpec.js

@@ -118,9 +118,17 @@ describe('Brief.showBanner', () => {
         expect(document.querySelector('.note-banner')).toBeNull();
     });
 
-    // ── T10 ── placement after h2 ─────────────────────────────────────────────
+    // ── T10 ── placement: anchor preferred over h2 ───────────────────────────
 
-    it('T10: banner is inserted immediately after the first h2 in the document', () => {
+    it('T10a: banner is inserted as nextSibling of #id_brief_banner_anchor when present', () => {
+        const anchor = document.createElement('div');
+        anchor.id = 'id_brief_banner_anchor';
+        fixture.appendChild(anchor);
+        Brief.showBanner(SAMPLE_BRIEF);
+        expect(anchor.nextElementSibling.classList.contains('note-banner')).toBeTrue();
+    });
+
+    it('T10b: falls back to inserting after the first h2 when anchor is absent', () => {
         Brief.showBanner(SAMPLE_BRIEF);
         const h2 = fixture.querySelector('h2');
         expect(h2.nextElementSibling.classList.contains('note-banner')).toBeTrue();

src/static_src/tests/NoteSpec.js

@@ -118,9 +118,17 @@ describe('Brief.showBanner', () => {
         expect(document.querySelector('.note-banner')).toBeNull();
     });
 
-    // ── T10 ── placement after h2 ─────────────────────────────────────────────
+    // ── T10 ── placement: anchor preferred over h2 ───────────────────────────
 
-    it('T10: banner is inserted immediately after the first h2 in the document', () => {
+    it('T10a: banner is inserted as nextSibling of #id_brief_banner_anchor when present', () => {
+        const anchor = document.createElement('div');
+        anchor.id = 'id_brief_banner_anchor';
+        fixture.appendChild(anchor);
+        Brief.showBanner(SAMPLE_BRIEF);
+        expect(anchor.nextElementSibling.classList.contains('note-banner')).toBeTrue();
+    });
+
+    it('T10b: falls back to inserting after the first h2 when anchor is absent', () => {
         Brief.showBanner(SAMPLE_BRIEF);
         const h2 = fixture.querySelector('h2');
         expect(h2.nextElementSibling.classList.contains('note-banner')).toBeTrue();

src/templates/core/base.html

@@ -44,6 +44,11 @@
                 {% endfor %}
             {% endif %}
 
+            {# Anchor for Brief.showBanner — banner inserts as nextSibling so #}
+            {# it lands at the top of page content on every base.html-extending #}
+            {# page, regardless of where (or whether) <h2> is positioned. #}
+            <div id="id_brief_banner_anchor"></div>
+
             {% block content %}
             {% endblock content %}