Refine analytics dialog drill-downs and identity icons

[thebuilder]

Summary

• streamline the analytics drill-down dialogs, including single-modal event navigation with a preserved Back flow
• make breakdown and event-property refreshes query-aware, retaining only the matching cached results
• add local browser, operating-system, and device identity icons, including active-filter badges
• harden Codex worktree setup by copying the current example SQLite database consistently

Why

The analytics UI had inconsistent dialog chrome, unnecessary loading states, and stacked modal backdrops while drilling into events. Browser, OS, and device breakdowns also lacked useful visual identity.

Validation

• corepack pnpm exec vitest run src/analytics/analytics-dashboard.controller.test.ts src/analytics/analytics-components.test.ts src/analytics/breakdown-value-icon.test.ts
• corepack pnpm build
• xmllint --noout public/icons/operating-systems/ios.svg
• git diff --check