feat: add pages - download accelerator, search (#93)

- design doc for tul_cv
- Move HTML templates from src/proxy/ to src/html/
- Add /tul_dl page: centered input box for URL proxy, mobile-friendly
- Rename /tuls to /tul_s: search UI with DuckDuckGo/Startpage selector
- Filter DDG tracking domains (improving/links/external-content) in api.rs
- Update index page (/): Tools section with links, split from CLI section
- Add tul_cv design proposal with WASM-based image/text tools plan

fix: strip more headers to prevent upstream auth conflicts (#83)

- Strip authorization, content-length, host, referer, accept-encoding, content-md5
- Strip Azure Storage signing headers (x-ms-date, x-ms-version, x-ms-blob-type)
- Strip Cloudflare metadata headers (cf-*) to avoid leakage
- Strip cdn-loop to prevent proxy loops

Fixes AuthenticationFailed error when proxying GitHub release assets
redirected to Azure blob storage with SAS token URLs.

updat readme and AGENTS (#82)

add index html and /tul_ip path

fix: add +reference-types target-feature for wasm catch wrappers

Merge pull request #73 from yylt/mcp

add mcp proxy support

Merge pull request #65 from yylt/feat/all-ech

process HTTPS dns

doh google

Merge pull request #36 from yylt/fix/mir

fix mirror

Merge pull request #33 from yylt/dev

update bot, readme, bump worker to 0.7.4

Merge pull request #26 from yylt/feature/froward

froward