Initial commit: dashboard-elements-ui library

Angular library providing dashboard components including grid layout,
drag-and-drop widgets, resize handles, toolbar, config panel, layout
presets, and persistence services.

src/components/db-dashboard/db-dashboard.component.html

@@ -0,0 +1,26 @@
+<!-- toolbar disabled for debugging -->
+
+<div class="db-dashboard__body">
+  @if (loading()) {
+    <div class="db-dashboard__loading">
+      <div class="db-dashboard__spinner"></div>
+    </div>
+  }
+
+  <db-grid
+    [widgets]="widgets()"
+    [columns]="gridColumns()"
+    [rowHeight]="gridRowHeight()"
+    [gap]="gridGap()"
+    [editMode]="currentEditMode()"
+    [contentDefs]="contentDefs()"
+    [footerDefs]="footerDefs()"
+    (widgetRemove)="onWidgetRemove($event)"
+    (widgetFullscreen)="onWidgetFullscreen($event)"
+    (widgetConfigOpen)="onWidgetConfigOpen($event)"
+    (widgetResizeEnd)="onWidgetResizeEnd($event)"
+    (widgetMoveEnd)="onWidgetMoveEnd($event)"
+  />
+
+  <!-- config panel and widget picker disabled for debugging -->
+</div>