Add moduleNameMapper for shared lib mocks in Jest

Create dedicated mock files for shared/lib modules and map them
in moduleNameMapper for reliable module resolution in CI.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mobile/__mocks__/shared-lib-scores.js

@@ -0,0 +1,21 @@
+// Mock for shared/lib/scores.ts
+module.exports = {
+  getTrustScore: jest.fn(() => Promise.resolve(0)),
+  getTrustScoreDetails: jest.fn(() => Promise.resolve(null)),
+  getReferralScore: jest.fn(() => Promise.resolve(0)),
+  getReferralCount: jest.fn(() => Promise.resolve(0)),
+  getStakingScoreFromPallet: jest.fn(() => Promise.resolve(0)),
+  getTikiScore: jest.fn(() => Promise.resolve(0)),
+  getAllScores: jest.fn(() =>
+    Promise.resolve({
+      trustScore: 0,
+      referralScore: 0,
+      stakingScore: 0,
+      tikiScore: 0,
+      totalScore: 0,
+    })
+  ),
+  getScoreColor: jest.fn(() => '#22C55E'),
+  getScoreRating: jest.fn(() => 'Good'),
+  formatScore: jest.fn((score) => String(score)),
+};