feat: mention teammates from Today updates (Closes #1064)

tests/e2e/fake_gitea.py

@@ -89,6 +89,11 @@ class FakeGiteaHandler(BaseHTTPRequestHandler):
             self._json(200, REPOSITORY)
         elif path == "/api/v1/repos/search":
             self._json(200, {"data": [REPOSITORY], "ok": True})
+        elif path == "/api/v1/repos/acme/mobile/assignees":
+            self._json(200, [
+                USER,
+                {"id": 2, "login": "alex", "full_name": "Alexander", "active": True},
+            ])
         elif path == "/api/v1/repos/issues/search":
             is_assigned_scan = query.get("assigned") == ["true"] and query.get("type") == ["issues"]
             is_available_scan = not any(

tests/e2e/test_mobile_today_handoff_release.py

@@ -96,6 +96,33 @@ def test_release_artifact_plans_hands_off_and_opens_next_mobile_issue(tmp_path:
                     "created_at": "2026-08-18T00:00:00Z",
                 }]
             }
+            page.locator("[data-mobile-today-update]").click()
+            expect(page.locator("#today-progress-sheet")).to_be_visible()
+            progress = page.locator("#today-progress-body")
+            progress.fill("Pairing with @al")
+            mention = page.locator('#today-progress-body-mentions [data-login="alex"]')
+            try:
+                expect(mention).to_be_visible()
+            except AssertionError as error:
+                raise AssertionError({
+                    "status": page.locator("#today-progress-body-mention-status").text_content(),
+                    "requests": fake.requests[-20:],
+                    "browser_errors": browser_errors,
+                    "failed_responses": failed_responses,
+                }) from error
+            mention_bounds = mention.bounding_box()
+            assert mention_bounds and mention_bounds["height"] >= 44
+            mention.click()
+            expect(progress).to_have_value("Pairing with @alex ")
+            page.locator("#post-today-progress").click()
+            expect(page.locator("#today-progress-sheet")).to_be_hidden()
+            admitted = page.evaluate("""() => {
+                const record = JSON.parse(localStorage.getItem('stackchain.authored-outbox.v1') || 'null');
+                return record?.items?.find(item => item.kind === 'issue-comment' && item.number === 41);
+            }""")
+            assert admitted and admitted["repository"] == "acme/mobile"
+            assert admitted["body"] == "Pairing with @alex"
+
             page.locator("[data-mobile-today-update]").click()
             expect(page.locator("#today-progress-sheet")).to_be_visible()
             owned = page.locator('[data-comment-id="701"]')
@@ -192,7 +219,10 @@ def test_release_artifact_plans_hands_off_and_opens_next_mobile_issue(tmp_path:
             expect(page.locator("#issue-comment")).to_have_value("")
             expect(page.locator("[data-mobile-today-hud]")).to_have_attribute("data-overlay-hidden", "true")
             expect(page.locator("[data-mobile-today-hud]")).to_contain_text("Polish desktop filters")
-            assert fake.comments == [(41, "Handoff complete; continuing with the next Today item.")]
+            assert fake.comments == [
+                (41, "Pairing with @alex"),
+                (41, "Handoff complete; continuing with the next Today item."),
+            ]
 
             receipt = page.locator("#today-completion-undo")
             expect(receipt).to_be_visible()

tests/test_mobile_composer_integration.py

@@ -54,12 +54,13 @@ def test_all_conversation_composers_offer_accessible_mobile_mentions():
     css = CSS.read_text()
 
     assert '<script src="static/mention-composer.js"></script>' in html
-    for composer in ("issue-comment", "pull-comment", "update-reply"):
+    for composer in ("issue-comment", "pull-comment", "update-reply", "today-progress-body"):
         assert f'id="{composer}-mentions"' in html
         assert f'id="{composer}-mention-status"' in html
-        assert f"textarea:qs('#{composer}')" in dashboard
-        assert f"listbox:qs('#{composer}-mentions')" in dashboard
-    assert dashboard.count("createMentionComposer({") == 3
+        assert f"['{composer}'," in dashboard
+    assert dashboard.count("createMentionComposer({") == 1
+    assert "['today-progress-body',()=>currentTodayProgressTarget()?.repository]" in dashboard
+    assert "mentions:todayProgressMentions" in dashboard
     assert "mention-candidates?q=" in dashboard
     assert ".mention-options" in css
     assert "min-height:44px" in css

tests/test_today_progress.py

@@ -245,6 +245,42 @@ const view=createView({{
     }
 
 
+def test_progress_sheet_dismisses_mentions_when_opened_switched_or_closed():
+    script = f"""
+const {{createView}}=require({json.dumps(str(TODAY_PROGRESS))});
+class Element {{
+  constructor() {{ this.hidden=false;this.value='';this.textContent='';this.open=false;this.listeners={{}}; }}
+  addEventListener(name,callback) {{ this.listeners[name]=callback; }}
+  click() {{ return this.listeners.click?.(); }}
+  showModal() {{ this.open=true; }} close() {{ this.open=false; }} focus() {{}}
+}}
+const selectors=['#today-progress-sheet','#today-progress-body','#today-progress-status','[data-mobile-today-update]',
+  '#today-progress-target','#cancel-today-progress','#save-today-progress','#post-today-progress'];
+const elements=Object.fromEntries(selectors.map(selector=>[selector,new Element()]));
+const issue={{identity:'issue:stackchain/dashboard:1064:',kind:'issue',repository:'stackchain/dashboard',number:1064,label:'#1064',title:'Mentions'}};
+const pull={{identity:'pull:stackchain/dashboard:77:',kind:'pull',repository:'stackchain/dashboard',number:77,label:'#77',title:'Other'}};
+let target=issue; let dismissals=0;
+const view=createView({{
+  progress:{{load:()=>'',save:()=>true}},currentTarget:()=>target,qs:selector=>elements[selector],
+  mentions:{{dismiss:()=>dismissals++}},
+}});
+(async()=>{{
+  await elements['[data-mobile-today-update]'].click();
+  const afterOpen=dismissals;
+  target=pull; view.update();
+  const afterSwitch=dismissals;
+  await elements['#cancel-today-progress'].click();
+  process.stdout.write(JSON.stringify({{afterOpen,afterSwitch,afterClose:dismissals,closed:!elements['#today-progress-sheet'].open}}));
+}})().catch(error=>{{console.error(error);process.exit(1);}});
+"""
+    assert run_node(script) == {
+        "afterOpen": 1,
+        "afterSwitch": 2,
+        "afterClose": 3,
+        "closed": True,
+    }
+
+
 def test_recent_activity_loads_the_exact_issue_newest_page_before_rendering():
     script = f"""
 const {{createActivity}}=require({json.dumps(str(TODAY_PROGRESS))});