From 98f68f7a1fd22682e7a48bc297f610cb82b06ce6 Mon Sep 17 00:00:00 2001
From: le king fu <lekingfu@protonmail.com>
Date: Mon, 27 Apr 2026 08:11:23 -0400
Subject: [PATCH] feat(prices): useIsPremium hook from license.edition
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- Reads useLicense().state.edition === 'premium'
- Ergonomic only — server enforces independently (ADR 0011)
- 3 vitest tests (premium, base, free)
- CLAUDE.md hook count 12 -> 13

Closes #157
---
 CLAUDE.md                      |  2 +-
 src/hooks/useIsPremium.test.ts | 42 ++++++++++++++++++++++++++++++++++
 src/hooks/useIsPremium.ts      | 10 ++++++++
 3 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 src/hooks/useIsPremium.test.ts
 create mode 100644 src/hooks/useIsPremium.ts

diff --git a/CLAUDE.md b/CLAUDE.md
index 9ca1969..76c3aba 100644
--- a/CLAUDE.md
+++ b/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
diff --git a/src/hooks/useIsPremium.test.ts b/src/hooks/useIsPremium.test.ts
new file mode 100644
index 0000000..4ca5c8a
--- /dev/null
+++ b/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);
+  });
+});
diff --git a/src/hooks/useIsPremium.ts b/src/hooks/useIsPremium.ts
new file mode 100644
index 0000000..fdfbc7d
--- /dev/null
+++ b/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";
+}