Move Follower Gains calendar/New Followers per Day directly under the KPI row

Reordered: calendar row now comes first in the content area (right under the
KPI tiles/Team member dropdown), followed by Visibility (full width), Posts
(full width), then the Impressions/Engagement Rate/Demographics row.

Refactored _build_person_dashboard/_build_empty_person_dashboard to return
their pieces (source_note, calendar_row, charts_row) separately instead of a
pre-assembled Div, so _render_team_tab controls the final ordering directly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app.py

@@ -3052,7 +3052,7 @@ def _build_person_dashboard(name, data):
             _team_demographics_table(data["content_demographics"])), md=3),
     ], className="gx-3 mb-3")
 
-    return html.Div([source_note, calendar_row, charts_row])
+    return source_note, calendar_row, charts_row
 
 
 _TEAM_EMPTY_PLACEHOLDER = html.Div("No data yet", className="text-muted text-center",
@@ -3082,7 +3082,7 @@ def _build_empty_person_dashboard(name):
         dbc.Col(section("Content Demographics — Top 5 (who engages)", _TEAM_EMPTY_PLACEHOLDER), md=3),
     ], className="gx-3 mb-3")
 
-    return html.Div([source_note, calendar_row, charts_row])
+    return source_note, calendar_row, charts_row
 
 
 @app.callback(
@@ -3108,22 +3108,23 @@ def _render_team_tab(name):
     if not data:
         stat_row = _team_empty_stat_row()
         posts_section = section("Posts This Window — Originals vs Reposts", _TEAM_EMPTY_PLACEHOLDER)
-        body = _build_empty_person_dashboard(name)
+        source_note, calendar_row, charts_row = _build_empty_person_dashboard(name)
         disabled = True
     else:
         stat_row = _team_stat_row(data)
         post_details = post_details_tracker.load_post_details(DATA_DIR, UPLOAD_DIR)
         posts_section = section("Posts This Window — Originals vs Reposts",
                                  _team_top_posts_table(data["top_posts"], post_details))
-        body = _build_person_dashboard(name, data)
+        source_note, calendar_row, charts_row = _build_person_dashboard(name, data)
         disabled = False
 
-    visibility_posts_row = dbc.Row([
+    # Follower Gains/New Followers per Day comes first, directly under the KPI row -
-        dbc.Col(visibility_row, md=3),
+    # Visibility/Posts and the rest of the charts follow below it.
-        dbc.Col(posts_section, md=9),
+    visibility_row_full = dbc.Row([dbc.Col(visibility_row, md=12)], className="gx-3 mb-3")
-    ], className="gx-3 mb-3")
+    posts_row_full = dbc.Row([dbc.Col(posts_section, md=12)], className="gx-3 mb-3")
+    body = html.Div([source_note, calendar_row, visibility_row_full, posts_row_full, charts_row])
 
-    return stat_row, html.Div([visibility_posts_row, body]), disabled
+    return stat_row, body, disabled
 
 
 @app.callback(