feat: standalone focus items with edit, convert, project tab, domain ordering

- Add standalone text line items to focus (quick-add with optional domain)
- Edit page for standalone items (title, domain, project)
- Convert standalone items to task, note, link, or list item
- Focus tab on project detail page showing assigned focus items
- Sort domain groups: General first, then by domain sort_order
- Add domain_id and title to nullable_fields in BaseRepository

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

routers/projects.py

@@ -251,6 +251,21 @@ async def project_detail(
         """))
         all_meetings = [dict(r._mapping) for r in result]
 
+    elif tab == "focus":
+        result = await db.execute(text("""
+            SELECT df.*,
+                   COALESCE(d.name, sd.name) as domain_name,
+                   COALESCE(d.color, sd.color) as domain_color
+            FROM daily_focus df
+            LEFT JOIN domains d ON df.domain_id = d.id
+            LEFT JOIN domains sd ON df.domain_id = sd.id
+            WHERE df.is_deleted = false
+              AND df.title IS NOT NULL
+              AND df.project_id = :pid
+            ORDER BY df.sort_order, df.created_at
+        """), {"pid": project_id})
+        tab_data = [dict(r._mapping) for r in result]
+
     elif tab == "contacts":
         result = await db.execute(text("""
             SELECT c.*, cp.role, cp.created_at as linked_at
@@ -276,6 +291,7 @@ async def project_detail(
         ("decisions", "SELECT count(*) FROM decisions d JOIN decision_projects dp ON dp.decision_id = d.id WHERE dp.project_id = :pid AND d.is_deleted = false"),
         ("meetings", "SELECT count(*) FROM meetings m JOIN project_meetings pm ON pm.meeting_id = m.id WHERE pm.project_id = :pid AND m.is_deleted = false"),
         ("contacts", "SELECT count(*) FROM contacts c JOIN contact_projects cp ON cp.contact_id = c.id WHERE cp.project_id = :pid AND c.is_deleted = false"),
+        ("focus", "SELECT count(*) FROM daily_focus WHERE project_id = :pid AND title IS NOT NULL AND is_deleted = false"),
     ]:
         result = await db.execute(text(count_sql), {"pid": project_id})
         counts[count_tab] = result.scalar() or 0