feat(dashboard): expand grid to 16 columns with auto-migration for saved 12-col layouts

packages/api/src/__tests__/assistant-tools-user-self-service-dashboard-layout.test.ts

@@ -25,7 +25,7 @@ describe("assistant user self-service dashboard layout tools", () => {
         findUnique: vi.fn().mockResolvedValue({
           dashboardLayout: {
             version: 2,
-            gridCols: 12,
+            gridCols: 16,
             widgets: [
               // Valid widget type so normalization preserves it
               { id: "stat-1", type: "stat-cards", x: 0, y: 0, w: 12, h: 3 },
@@ -76,7 +76,7 @@ describe("assistant user self-service dashboard layout tools", () => {
     const ctx = createToolContext(db, SystemRole.ADMIN);
     const layout = {
       version: 2,
-      gridCols: 12,
+      gridCols: 16,
       widgets: [],
     };
 

packages/api/src/__tests__/user-router.test.ts

@@ -800,7 +800,7 @@ describe("user dashboard and favorites", () => {
 
     const layout = {
       version: 2,
-      gridCols: 12,
+      gridCols: 16,
       widgets: [],
     };
 
@@ -841,7 +841,7 @@ describe("user dashboard and favorites", () => {
     await caller.saveDashboardLayout({
       layout: {
         version: 2,
-        gridCols: 12,
+        gridCols: 16,
         widgets: [],
       },
     });
@@ -851,7 +851,7 @@ describe("user dashboard and favorites", () => {
       data: {
         dashboardLayout: {
           version: 2,
-          gridCols: 12,
+          gridCols: 16,
           widgets: [],
         },
       },