Merge pull request 'feat(prices): useIsPremium hook (#157)' (#164) from issue-157-use-is-premium into main

CLAUDE.md

@@ -49,7 +49,7 @@ src/
 │   ├── shared/          # Composants réutilisables
 │   └── transactions/    # Transactions
 ├── contexts/            # ProfileContext (état global profil)
-├── hooks/               # 12 hooks custom (useReducer)
+├── hooks/               # 13 hooks custom (useReducer)
 ├── pages/               # 11 pages
 ├── services/            # 14 services métier
 ├── shared/              # Types et constantes partagés

src/hooks/useIsPremium.test.ts

@@ -0,0 +1,42 @@
+import { describe, it, expect, vi } from "vitest";
+import { useIsPremium } from "./useIsPremium";
+
+vi.mock("./useLicense", () => ({
+  useLicense: vi.fn(),
+}));
+
+import { useLicense } from "./useLicense";
+
+const mockUseLicense = vi.mocked(useLicense);
+
+describe("useIsPremium", () => {
+  it('returns true when edition is "premium"', () => {
+    mockUseLicense.mockReturnValue({
+      state: { status: "ready", edition: "premium", info: null, error: null },
+      refresh: vi.fn(),
+      submitKey: vi.fn(),
+      checkEntitlement: vi.fn(),
+    });
+    expect(useIsPremium()).toBe(true);
+  });
+
+  it('returns false when edition is "base"', () => {
+    mockUseLicense.mockReturnValue({
+      state: { status: "ready", edition: "base", info: null, error: null },
+      refresh: vi.fn(),
+      submitKey: vi.fn(),
+      checkEntitlement: vi.fn(),
+    });
+    expect(useIsPremium()).toBe(false);
+  });
+
+  it('returns false when edition is "free"', () => {
+    mockUseLicense.mockReturnValue({
+      state: { status: "ready", edition: "free", info: null, error: null },
+      refresh: vi.fn(),
+      submitKey: vi.fn(),
+      checkEntitlement: vi.fn(),
+    });
+    expect(useIsPremium()).toBe(false);
+  });
+});

src/hooks/useIsPremium.ts

@@ -0,0 +1,10 @@
+import { useLicense } from "./useLicense";
+
+/**
+ * Returns true if the active license edition is "premium".
+ * Ergonomic helper only — the server enforces entitlements independently (cf. ADR 0011 §UX).
+ */
+export function useIsPremium(): boolean {
+  const { state } = useLicense();
+  return state.edition === "premium";
+}