Report: Chapter IV — Team × Project Activity pivot

Final chapter of the executive redesign. Renders the
team_project_activity context as a pivot: rows=teams, columns=projects,
cell=COUNT(DISTINCT work-log dates). Zero cells show em-dashes in muted
grey (not '0') so non-zero cells stand out. Row totals, column totals,
and grand total on the bottom row.

Adds a tiny dictlookup template filter (format_tags.py) — Django
templates can't index a dict by a dynamic variable key, and the pivot
cell lookup is cells_by_project_id[col.id]. Defensive None + TypeError
guards so a malformed context can't 500 the page.

.table-total-row CSS: 2px top border + inset background for the footer
row so totals visually separate from the data rows.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

core/templates/core/report.html

@@ -333,6 +333,53 @@
     </div>
 </div>
 
+{# === CHAPTER IV — Team × Project Activity === #}
+<h5 class="chapter-heading mb-3"><span class="chapter-num">IV</span>Team &times; Project Activity</h5>
+<div class="card mb-4">
+    <div class="card-header py-3">
+        <h6 class="m-0 fw-bold"><i class="fas fa-th me-2" style="color: var(--accent);"></i>Distinct Work Days per Team &times; Project</h6>
+    </div>
+    <div class="card-body p-0">
+        {% if team_project_activity.rows %}
+        <div class="table-responsive">
+            <table class="table table-sm mb-0 report-numeric">
+                <thead>
+                    <tr>
+                        <th>Team</th>
+                        {% for col in team_project_activity.columns %}
+                        <th class="text-end">{{ col.name }}</th>
+                        {% endfor %}
+                        <th class="text-end fw-bold">Total</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    {% for row in team_project_activity.rows %}
+                    <tr>
+                        <td class="fw-medium">{{ row.team_name }}</td>
+                        {% for col in team_project_activity.columns %}
+                        <td class="text-end">
+                            {% with days=row.cells_by_project_id|dictlookup:col.id %}
+                            {% if days %}{{ days }}{% else %}<span class="text-muted">&mdash;</span>{% endif %}
+                            {% endwith %}
+                        </td>
+                        {% endfor %}
+                        <td class="text-end fw-semibold">{{ row.row_total }}</td>
+                    </tr>
+                    {% endfor %}
+                    <tr class="table-total-row">
+                        <td class="fw-bold">Total</td>
+                        {% for col in team_project_activity.columns %}
+                        <td class="text-end fw-bold">{{ team_project_activity.col_totals|dictlookup:col.id }}</td>
+                        {% endfor %}
+                        <td class="text-end fw-bold">{{ team_project_activity.grand_total }}</td>
+                    </tr>
+                </tbody>
+            </table>
+        </div>
+        {% else %}<p class="text-muted text-center py-3 mb-0">No team &times; project activity in this period.</p>{% endif %}
+    </div>
+</div>
+
 <!-- Bottom Action Bar -->
 <div class="d-flex justify-content-between align-items-center d-print-none">
     <a href="{% url 'home' %}" class="btn btn-outline-secondary"><i class="fas fa-arrow-left me-1"></i>Back to Dashboard</a>

core/templatetags/format_tags.py

@@ -25,3 +25,20 @@ def money(value):
     # Python's :, format gives comma separators — swap commas for spaces
     formatted = f"{num:,.2f}"
     return formatted.replace(",", " ")
+
+
+@register.filter
+def dictlookup(d, key):
+    """Look up a dict value by a dynamic key.
+
+    Plain-English: in Django templates, `{{ mydict.foo }}` only works when
+    `foo` is a literal key. For `mydict[col.id]` with a variable key you need
+    a filter — this one. Returns None if the key is missing or the input
+    isn't a dict.
+    """
+    if d is None:
+        return None
+    try:
+        return d.get(key)
+    except (AttributeError, TypeError):
+        return None

static/css/custom.css

@@ -1721,3 +1721,15 @@ body, .card, .modal-content, .form-control, .form-select,
 .report-numeric th {
     font-variant-numeric: tabular-nums;
 }
+
+/* === Pivot-table footer totals (Chapter IV) === */
+/*
+   Bold, slightly-lifted row at the bottom of the Team × Project pivot
+   that holds the column totals + grand total. The 2px top border
+   visually separates totals from the data rows; the inset background
+   is the same --bg-inset used by other "slightly raised" surfaces.
+*/
+.table-total-row td {
+    border-top: 2px solid var(--border-default) !important;
+    background: var(--bg-inset);
+}