Add dashboard and vendors view controls

[andrewzolotukhin]

Original request

Add an Expand all button to the vendors and dashboard views, plus a small settings menu near Add that lets the user display all costs in the default or one of their favorite currencies. Follow-up: put Expand all / Collapse all under the new settings menu and make currencies second-level submenu items.

What changed

• Added optional dashboard currency query support to the contracts, API cache keys, API handlers, and dashboard window helper.
• Dashboard summaries keep default-currency behavior by default, and convert original transaction amounts into a selected reporting currency when requested.
• Added a dashboard/vendors View settings menu next to Add Transaction.
• Moved Expand all / Collapse all into the top level of that View settings menu for both Dashboard and Vendors.
• Moved currency choices into a second-level Display currency submenu with default/favorite currency radio items.
• Preserved the selected dashboard/vendors currency in URLs, period tabs, swipe navigation, and dashboard-to-vendors links.
• Updated e2e and component tests for the settings-menu expand flow and the currency submenu hierarchy.

Reasoning

The currency selector needs API-backed conversion because dashboard totals are aggregated before rendering. A client-only relabel would misstate totals, so the API now converts transaction original amounts to the selected reporting currency only when a non-default currency is requested. Keeping Expand all / Collapse all in the same View settings menu as Display currency makes the header control the place for view-level options, while row-level disclosure buttons still handle individual groups.

Screenshots / preview evidence

Preview URL: https://xpenser-pr-058.cleverbrush.com

Manual preview QA completed against the seeded preview account:

• Dashboard has no standalone Categories-card Expand all button.
• Dashboard View settings opens a first-level menu with Expand all and Display currency USD.
• Dashboard Display currency opens a second-level submenu with USD checked and EUR available.
• Dashboard Expand all from View settings opens nested vendor rows and the menu item flips to Collapse all.
• Vendors has no standalone Vendors-card Expand all button.
• Vendors View settings opens a first-level menu with Expand all and Display currency USD.
• Vendors Display currency opens a second-level submenu with USD checked and EUR available.
• Vendors Expand all from View settings opens nested category rows.

Validation

• npm run lint passed.
• npm run typecheck passed.
• npm test passed: 81 files, 438 tests.
• Focused component tests passed: npx vitest --run apps/web/components/dashboard-view-settings-menu.test.tsx apps/web/components/dashboard-explorer.test.tsx apps/web/components/vendor-analytics-panel.test.tsx.
• GitHub required checks passed on commit 29696d2:
  • Lint and test
  • Deploy PR environment
  • Playwright e2e
• SigNoz checks for xpenser-web-pr-58 and xpenser-api-pr-58 over the preview QA window:
  • Error logs: no rows returned.
  • Error traces: no rows returned.
  • Metrics: no http or request metrics were listed for these PR services in that window, so no metric query was applicable.
• PR-ready notification sent successfully.