feat(web): add network switcher

[silent-cipher]

closes #371

[Copilot]

Pull request overview

Adds a UI indicator and switcher to make it clear which Filecoin network a DealBot deployment is monitoring, and provides a way to jump to the sibling deployment for the other network (per #371).

Changes:

• Add /api/config client + useNetworkConfig() hook and network config types.
• Introduce NetworkBadge (current network) and NetworkSwitcher (link to other deployment) and wire them into the landing page/header.
• Extend Vitest/MSW setup to support mocking /api/config, plus small responsive tweaks to header/UI toggle.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
apps/web/tsconfig.json	Adds project reference for Vitest tsconfig.
apps/web/tsconfig.app.json	Includes test/mocks in app typecheck inputs.
apps/web/test/setup-env.ts	Sets runtime config for tests and overrides import.meta.env.
apps/web/test/mocks/handlers/index.ts	Registers new MSW handler for /api/config.
apps/web/test/mocks/handlers/config.ts	Adds MSW mock response for app config endpoint.
apps/web/src/types/config.ts	Introduces Network + AppConfigResponse types.
apps/web/src/api/client.ts	Adds fetchAppConfig() for /api/config.
apps/web/src/hooks/useNetworkConfig.ts	New hook to fetch/expose monitored network.
apps/web/src/components/shared/Network/constants.ts	Defines labels/colors/deployment URLs per network.
apps/web/src/components/shared/Network/NetworkBadge.tsx	Renders “Network: …” badge based on config.
apps/web/src/components/shared/Network/NetworkSwitcher.tsx	Adds switch action linking to other deployment.
apps/web/src/components/shared/Network/NetworkSwitcher.test.tsx	Adds unit tests for switcher behavior.
apps/web/src/components/shared/index.ts	Exports new shared network components.
apps/web/src/components/shared/Header/index.tsx	Adds the NetworkSwitcher into the header layout.
apps/web/src/pages/Landing.tsx	Displays the NetworkBadge on the landing hero.
apps/web/src/components/shared/UIVersionToggle/index.tsx	Hides “New UI” label on small screens.

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[SgtPooki]

we should switch network in current tab.. thats the only change I would recommend.