feat: add edit mode toggle to dashboard page

- Edit/Done toggle button in header (pencil icon)
- Widget delete buttons only visible in edit mode
- Add widget button only visible in edit mode
- Empty state prompts to enter edit mode instead of adding directly
- Default is view mode — clean, no accidental deletes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/app/dashboards/[id]/page.tsx

@@ -4,6 +4,7 @@ import { useState, useEffect, use, useCallback } from "react";
 import { useRouter } from "next/navigation";
 import Link from "next/link";
 import {
+  PencilIcon,
   PlusIcon,
   Trash2Icon,
   RefreshCwIcon,
@@ -58,6 +59,7 @@ export default function DashboardPage({ params }: { params: Promise<{ id: string
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
   const [autoRefresh, setAutoRefresh] = useState(false);
+  const [editMode, setEditMode] = useState(false);
   const [teams, setTeams] = useState<Team[]>([]);
 
   // Add widget dialog
@@ -231,6 +233,15 @@ export default function DashboardPage({ params }: { params: Promise<{ id: string
             </div>
           </div>
           <div className="flex items-center gap-2">
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => setEditMode((v) => !v)}
+              className={cn("h-8 border-border/80", editMode ? "bg-primary/20 text-primary border-primary/40" : "bg-card/70")}
+            >
+              <PencilIcon className="h-4 w-4" />
+              {editMode ? "Done" : "Edit"}
+            </Button>
             <Button
               variant="outline"
               size="sm"
@@ -249,10 +260,12 @@ export default function DashboardPage({ params }: { params: Promise<{ id: string
               <RefreshCwIcon className="h-4 w-4" />
               Refresh
             </Button>
-            <Button size="sm" onClick={() => setAddOpen(true)} className="h-8 bg-primary shadow-sm">
+            {editMode && (
-              <PlusIcon className="h-4 w-4" />
+              <Button size="sm" onClick={() => setAddOpen(true)} className="h-8 bg-primary shadow-sm">
-              Add widget
+                <PlusIcon className="h-4 w-4" />
-            </Button>
+                Add widget
+              </Button>
+            )}
           </div>
         </div>
       </header>
@@ -262,10 +275,17 @@ export default function DashboardPage({ params }: { params: Promise<{ id: string
           <div className="flex h-full flex-col items-center justify-center gap-3">
             <LayoutGridIcon className="h-10 w-10 text-muted-foreground/40" />
             <p className="text-sm text-muted-foreground">No widgets yet</p>
-            <Button variant="outline" size="sm" onClick={() => setAddOpen(true)}>
+            {editMode ? (
-              <PlusIcon className="h-4 w-4" />
+              <Button variant="outline" size="sm" onClick={() => setAddOpen(true)}>
-              Add your first widget
+                <PlusIcon className="h-4 w-4" />
-            </Button>
+                Add your first widget
+              </Button>
+            ) : (
+              <Button variant="outline" size="sm" onClick={() => setEditMode(true)}>
+                <PencilIcon className="h-4 w-4" />
+                Enter edit mode
+              </Button>
+            )}
           </div>
         ) : (
           <div className="grid auto-rows-[minmax(100px,auto)] grid-cols-6 gap-3 md:grid-cols-12 md:gap-4">
@@ -276,14 +296,16 @@ export default function DashboardPage({ params }: { params: Promise<{ id: string
                 style={widgetGridStyle(widget.position)}
               >
                 {renderWidget(widget)}
-                <button
+                {editMode && (
-                  type="button"
+                  <button
-                  onClick={() => handleDeleteWidget(widget.id)}
+                    type="button"
-                  className="absolute right-2 top-2 hidden h-6 w-6 items-center justify-center rounded bg-destructive/90 text-destructive-foreground transition-opacity hover:bg-destructive group-hover:flex"
+                    onClick={() => handleDeleteWidget(widget.id)}
-                  title="Remove widget"
+                    className="absolute right-2 top-2 hidden h-6 w-6 items-center justify-center rounded bg-destructive/90 text-destructive-foreground transition-opacity hover:bg-destructive group-hover:flex"
-                >
+                    title="Remove widget"
-                  <Trash2Icon className="h-3.5 w-3.5" />
+                  >
-                </button>
+                    <Trash2Icon className="h-3.5 w-3.5" />
+                  </button>
+                )}
               </div>
             ))}
           </div>