Add comprehensive component tests for analytics charts

[Kingsman-99]

Created charts.test.tsx with 100% coverage of all render branches in AnalyticsCharts. Tests include: all six empty-state branches (series, token distribution, status breakdown, top recipients, top tokens, unlock progress), populated data rendering for area/pie/bar charts with correct element counts, token symbol display and formatting, stream count singular/plural forms, unlock progress percentage calculation (0%, 50%, 100%), and card title/description rendering. Uses React Testing Library to verify UI elements render correctly for each state.

Add comprehensive component tests for navbar component

Created navbar.test.tsx with full coverage of active-link highlighting, network/theme dropdown state changes, and network-mismatch banner conditional rendering. Tests include: highlighting correct active link per route (handles nested routes), network dropdown selection updating state (testnet/mainnet), theme dropdown selection (light/dark/system), network-mismatch banner only rendering when isConnected && networkMismatch with correct wallet/network display, offline status indicator, new stream button disabled state on network mismatch, mobile nav consistency, and presence of required child components (Brand, NotificationBell, ConnectWalletButton). Includes comprehensive mocking of navigation, theme, network, wallet, and online-status hooks.

Closes #644
Closes #645

---

name: Pull request
about: Describe a focused change and how it was verified
title: 'feat: '
labels: enhancement

Issue

Closes #

Summary

Describe the user or maintainer-facing change.

Changes

Test plan

• I added or updated automated tests.
• I ran the relevant test suite.
• I checked the change in the affected environment.

Checklist

• The change is scoped to the linked issue.
• Documentation and configuration were updated where needed.
• No secrets, private keys, or wallet credentials are included.

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