[firecrawl-ui] Complete Firecrawl v2 API coverage (deep research, llms.txt, billing, batch/crawl/extract controls)

[obeone]

Summary

Completes UI + service-adapter coverage for the remaining Firecrawl v2 API surface. Every v2 operation now has a wired adapter in src/services/firecrawl.ts and a corresponding UI.

New views:

• Deep Research (/research) — POST /v2/deep-research + status polling, live activities, sources, final analysis, Markdown/JSON download.
• LLMs.txt (/llmstxt) — POST /v2/llmstxt + status polling, renders llmstxt/llmsfulltxt with downloads.
• Billing (/billing) — credit usage + Extract token usage (GET /v2/team/credit-usage, GET /v2/team/token-usage).

Extended existing views:

• Batch Scrape — multi-URL batch job, polling, cancel (DELETE /v2/batch/scrape/{id}) and error reporting (.../errors).
• Crawl — list active crawls (GET /v2/crawl/active), cancel, crawl error report.
• Extract — resume an extract job by ID (GET /v2/extract/{id}).

Wiring: routes added in src/router/index.ts, feature cards added to src/views/HomeView.vue.

Test plan

• npx prettier --check "src/**/*.{ts,vue}" — clean
• npx eslint src — clean
• npm run build — succeeds (138 modules transformed)
• Manual: each new route (/research, /llmstxt, /billing) and the cancel/errors/active/resume controls with a valid API key in localStorage.

Note: no automated tests exist in this project (npm test is a no-op); type-checking relies on eslint + the Vite build, as elsewhere in the repo.

[obeone]

@claude Please verify in the official documentation if these endpoints exists