feat: replace the navigation with a dashboard and per-area boards

templates/board/_floorplan.html.twig

@@ -0,0 +1,32 @@
+{#
+    The frame around a plan: heading, legend, span picker. The drawing itself lives in
+    board/plan/_<type>.html.twig and is included by convention, so a new ResourceType needs a new
+    partial there and nothing else.
+
+    Colouring needs no JavaScript at all: the plan is re-rendered server side for the selected day
+    and span, so free/belegt/deine is decided in Twig. Note "free" is always relative to the span
+    in the header -- a desk booked 09:00-13:00 is free for an afternoon board and belegt for an
+    all-day one.
+#}
+<div class="rounded-md border border-gray-200 p-4">
+    <div class="flex flex-wrap items-baseline justify-between gap-2 pb-2">
+        <h2 class="!pb-0">{{ selected_date|format_datetime(pattern: 'EEEE, d. MMMM y') }}</h2>
+        <div class="flex items-center gap-4 text-xs text-gray-500">
+            <span class="flex items-center gap-1"><span class="w-3 h-3 rounded-sm bg-emerald-50 border-2 border-emerald-500"></span> frei</span>
+            <span class="flex items-center gap-1"><span class="w-3 h-3 rounded-sm bg-gray-200 border-2 border-gray-400"></span> belegt</span>
+            <span class="flex items-center gap-1"><span class="w-3 h-3 rounded-sm bg-primary border-2 border-primary-dark"></span> deine</span>
+        </div>
+    </div>
+
+    {% include 'board/_timerange.html.twig' %}
+
+    {% if is_past %}
+        <p class="pb-4 text-sm text-amber-700">Vergangener Tag — hier lässt sich nichts mehr buchen.</p>
+    {% endif %}
+
+    {% if resources is empty %}
+        <p class="py-8 text-center text-sm text-gray-500">Für diesen Bereich ist noch nichts eingerichtet.</p>
+    {% else %}
+        {% include 'board/plan/_' ~ type.value ~ '.html.twig' %}
+    {% endif %}
+</div>