test(overview): dedupe the MockChart test double into a shared helper

The vi.mock('chart.js', ...) MockChart class was copy-pasted verbatim
between chart-canvas.spec.ts and overview.spec.ts. Extract it to
shared/chart-canvas/testing/mock-chart.ts and import it via
vi.hoisted(async () => import(...)) in each spec, since vi.mock's
factory is hoisted above regular imports and can't reference a
plain top-level import.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

myteamwallet_frontend_modern/src/app/features/team/overview/overview.spec.ts

@@ -11,28 +11,11 @@ import { TeamStore } from '../../../core/team/team-store';
 import { environment } from '../../../../environments/environment';
 import { TeamOverviewStats } from '../../../models/team-stats.model';
 
-const { MockChart } = vi.hoisted(() => {
+// `vi.mock`'s factory is hoisted above regular imports, so the shared mock class is
-  class MockChart {
+// loaded via a dynamic import inside `vi.hoisted` rather than a plain top-level import.
-    static register = vi.fn();
+const { MockChart } = await vi.hoisted(
-    static instances: MockChart[] = [];
+  async () => import('../../../shared/chart-canvas/testing/mock-chart'),
-    data: unknown;
+);
-    options: unknown;
-    config: { type: unknown; data: unknown; options: unknown };
-    destroy = vi.fn();
-    update = vi.fn();
-
-    constructor(
-      public ctx: unknown,
-      config: { type: unknown; data: unknown; options: unknown },
-    ) {
-      this.config = config;
-      this.data = config.data;
-      this.options = config.options;
-      MockChart.instances.push(this);
-    }
-  }
-  return { MockChart };
-});
 
 vi.mock('chart.js', () => ({ Chart: MockChart, registerables: [] }));
 

myteamwallet_frontend_modern/src/app/shared/chart-canvas/chart-canvas.spec.ts

@@ -1,28 +1,9 @@
 import { TestBed } from '@angular/core/testing';
 import { ChartCanvas } from './chart-canvas';
 
-const { MockChart } = vi.hoisted(() => {
+// `vi.mock`'s factory is hoisted above regular imports, so the shared mock class is
-  class MockChart {
+// loaded via a dynamic import inside `vi.hoisted` rather than a plain top-level import.
-    static register = vi.fn();
+const { MockChart } = await vi.hoisted(async () => import('./testing/mock-chart'));
-    static instances: MockChart[] = [];
-    data: unknown;
-    options: unknown;
-    config: { type: unknown; data: unknown; options: unknown };
-    destroy = vi.fn();
-    update = vi.fn();
-
-    constructor(
-      public ctx: unknown,
-      config: { type: unknown; data: unknown; options: unknown },
-    ) {
-      this.config = config;
-      this.data = config.data;
-      this.options = config.options;
-      MockChart.instances.push(this);
-    }
-  }
-  return { MockChart };
-});
 
 vi.mock('chart.js', () => ({ Chart: MockChart, registerables: [] }));
 

myteamwallet_frontend_modern/src/app/shared/chart-canvas/testing/mock-chart.ts

@@ -0,0 +1,32 @@
+import { vi } from 'vitest';
+
+/**
+ * Test double for Chart.js's `Chart` class, shared by `chart-canvas.spec.ts` and
+ * `overview.spec.ts`. jsdom has no canvas 2D context, so real Chart.js cannot render
+ * in this project's test environment — specs mock the whole `chart.js` module via
+ * `vi.mock('chart.js', () => ({ Chart: MockChart, registerables: [] }))` and assert
+ * on the Chart.js lifecycle contract (constructor args, update(), destroy()) instead.
+ *
+ * Not a `*.spec.ts` file on purpose: it exports a class rather than defining tests,
+ * so it must not be picked up by the test runner's `**\/*.spec.ts` include glob.
+ */
+export class MockChart {
+  static register = vi.fn();
+  static instances: MockChart[] = [];
+
+  data: unknown;
+  options: unknown;
+  config: { type: unknown; data: unknown; options: unknown };
+  destroy = vi.fn();
+  update = vi.fn();
+
+  constructor(
+    public ctx: unknown,
+    config: { type: unknown; data: unknown; options: unknown },
+  ) {
+    this.config = config;
+    this.data = config.data;
+    this.options = config.options;
+    MockChart.instances.push(this);
+  }
+}