perf: gzip and HTTP/2 for the site clients

x-media's reqwest had exactly `["json", "rustls-tls"]` — no decompression, no
HTTP/2 — so every adapter fetched its JSON as identity over HTTP/1.1. The
site APIs compress: twitter's syndication body measures 4469 bytes identity
against 1066 gzipped (4.2x) for a single-tweet response, and the fetch is on
every twitter link. The CDNs all negotiate h2 (the shared client reports
HTTP/2.0 against cdn.syndication.twimg.com, api.bilibili.com and
public.api.bsky.app), which also multiplexes the concurrent media downloads
that used to open a connection each.

Both features are one crate-level switch, so the pages' compression is what
the APIs answer with and requires no adapter change: reqwest adds
`accept-encoding: gzip` and decompresses transparently. `download_media_limited`
keeps a correct size cap either way — it checks the accumulated *body* while
streaming, not the declared Content-Length, which for a compressed response
is the compressed size.

Verified: a local echo server recorded `accept-encoding: gzip` on a request
from the shared client (both clients come from `build_client`), and a probe
over the shared `CLIENT` reported `HTTP/2.0` for the three site hosts above.
`cargo test -p x-media -- --ignored live` (14 passed) covers the real
endpoints with the new transport.

Cargo.lock gains async-compression (+codecs/core), fnv and h2.

`cargo fmt --check`, `cargo clippy --workspace --all-targets --locked -- -D
warnings` and `cargo test --workspace --locked` clean.

AGENTS.md

@@ -96,7 +96,7 @@ Docker: `docker build -t tgxmb .` then `docker run --rm -d --name tgxmb --env-fi
 
 - **Rust, stable, edition 2024**, workspace resolver 3. No `rust-version`/MSRV pin, no `rust-toolchain.toml` — recent stable is assumed. No nightly features.
 - Package manager: **Cargo** (workspace with path dep `x-media` ← `xmedia-bot`). No `[workspace.package]`/shared deps — each crate lists deps independently.
-- **TLS is rustls end-to-end** (no native-tls/openssl in the tree, no libssl in the Docker runtime image): `teloxide` is declared `default-features = false` with `["webhooks-axum", "macros", "rustls", "ctrlc_handler"]` (the removed `default` also carried `native-tls` and `ctrlc_handler` — the latter must stay); x-media's reqwest is `default-features = false` with `["json", "rustls-tls"]` (webpki-roots baked in, so the image ships no CA bundle). One reqwest 0.12.28 in the lock.
+- **TLS is rustls end-to-end** (no native-tls/openssl in the tree, no libssl in the Docker runtime image): `teloxide` is declared `default-features = false` with `["webhooks-axum", "macros", "rustls", "ctrlc_handler"]` (the removed `default` also carried `native-tls` and `ctrlc_handler` — the latter must stay); x-media's reqwest is `default-features = false` with `["json", "rustls-tls", "gzip", "http2"]` (webpki-roots baked in, so the image ships no CA bundle; `gzip` because the site APIs answer their JSON compressed — twitter's syndication body is 4469 bytes identity vs 1066 gzipped — and `http2` because every site CDN here negotiates h2). One reqwest 0.12.28 in the lock.
 - **Versioning**: bump the version in all three places (`crates/x-media/Cargo.toml`, `crates/xmedia-bot/Cargo.toml`, `Cargo.lock`) and **keep `README.md`, `README.en.md` and `AGENTS.md` in sync with the code on every bump**, then commit (`chore: bump version to X.Y.Z`), create an annotated tag `vX.Y.Z`, and push branch + tag (the tag push triggers the Docker Hub build). The tag must equal both crate versions: `.github/workflows/docker.yml` verifies that before building, and `--locked` verifies the lock file.
 - Config is **environment-variable driven** (dotenv loads `.env`, which is gitignored; `.env.example` is the tracked template — `cp .env.example .env` — and is also the file `docker compose` substitutes `${VAR}` from, so every variable the compose passes must be documented there). Key vars: `TELOXIDE_TOKEN` (required), `PIXIV_REFRESH_TOKEN`, `TWITTER_AUTH_TOKEN` (optional; x.com `auth_token` cookie — enables the logged-in GraphQL fallback that fetches NSFW tweets syndication withholds), `BILIBILI_COOKIE` (optional; whole bilibili cookie string — bilibili dynamics fetch anonymously and add their own device cookies, this only rescues an egress IP that bilibili has hard-flagged with `-352`/412), `BOT_ADMIN` (comma-separated ids), `EDIT_MESSAGE_TTL_SECONDS` (default 86400), `LINK_CACHE_TTL_SECONDS` (default 604800), `CAPTION_QUOTE_TEXT_CHARS` (default 200; a post whose text — the `title` plus `content` joined, see `site::compose_text` — reaches this length gets that text wrapped in an expandable blockquote inside its caption, the URL and author line staying outside; `0` disables it. Applied at the send boundary in `send::quote_long_caption`, which locates the text as what follows the author link, so a `/set_format` that moves `{title}`/`{content}` elsewhere and pixiv's title-inside-a-link layout opt out; `copy_messages` forwards and queued retries inherit the wrap, while the edit-before-forward rewrite stays unquoted by design), `DATA_DIR` (default `data`, CWD-relative; the SQLite dir, auto-created), `WEBHOOK`/`WEBHOOK_URL`/`WEBHOOK_LISTEN`/`WEBHOOK_PORT`/`WEBHOOK_CERT`/`WEBHOOK_SECRET_TOKEN` (webhook mode requires URL/listen/port, `.expect`ed; `WEBHOOK_CERT` is Telegram-facing self-signed validation only — TLS must be terminated by a reverse proxy), `RUST_LOG`, `TELOXIDE_PROXY`, `LOCAL_USER_ID` (entrypoint only).
 - SQLite via `rusqlite` with `bundled` feature (no system libsqlite needed). DB file `$DATA_DIR/task_queue.db` (default `data/task_queue.db`, CWD-relative — run from the workspace root, or `/app` in Docker; set `DATA_DIR` to pin state anywhere). Mount `./data` and `./cert` volumes.

Cargo.lock

@@ -60,6 +60,18 @@ dependencies = [
  "object",
 ]
 
+[[package]]
+name = "async-compression"
+version = "0.4.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3976abdc8fe7d1133d43d304afd42abdf5bc3e1319d263d223bde07b5efc4be8"
+dependencies = [
+ "compression-codecs",
+ "compression-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
@@ -266,6 +278,23 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "compression-codecs"
+version = "0.4.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce2548391e9c1929c21bf6aa2680af86fe4c1b33e6cea9ac1cfeec0bd11218cf"
+dependencies = [
+ "compression-core",
+ "flate2",
+ "memchr",
+]
+
+[[package]]
+name = "compression-core"
+version = "0.4.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc14f565cf027a105f7a44ccf9e5b424348421a1d8952a8fc9d499d313107789"
+
 [[package]]
 name = "const-oid"
 version = "0.10.2"
@@ -583,6 +612,12 @@ dependencies = [
  "zlib-rs",
 ]
 
+[[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
 [[package]]
 name = "foldhash"
 version = "0.2.0"
@@ -713,6 +748,25 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "h2"
+version = "0.4.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6cb093c84e8bd9b188d4c4a8cb6579fc016968d14c99882163cd3ff402a4f155"
+dependencies = [
+ "atomic-waker",
+ "bytes",
+ "fnv",
+ "futures-core",
+ "futures-sink",
+ "http",
+ "indexmap 2.14.2",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -849,6 +903,7 @@ dependencies = [
  "bytes",
  "futures-channel",
  "futures-core",
+ "h2",
  "http",
  "http-body",
  "httparse",
@@ -1740,6 +1795,7 @@ dependencies = [
  "bytes",
  "futures-core",
  "futures-util",
+ "h2",
  "http",
  "http-body",
  "http-body-util",
@@ -2425,12 +2481,17 @@ version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840"
 dependencies = [
+ "async-compression",
  "bitflags 2.13.2",
  "bytes",
+ "futures-core",
  "futures-util",
  "http",
  "http-body",
+ "http-body-util",
  "pin-project-lite",
+ "tokio",
+ "tokio-util",
  "tower",
  "tower-layer",
  "tower-service",

crates/x-media/Cargo.toml

@@ -4,7 +4,7 @@ version = "1.8.0"
 edition = "2024"
 
 [dependencies]
-reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls", "gzip", "http2"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 regex = "1.12"