* refactor: replace reqwest with ureq to reduce binary size
reqwest's blocking API is built on top of its async implementation,
pulling in tokio, hyper, futures, and ~84 other transitive dependencies
even though we only make simple synchronous HTTP calls.
ureq is a synchronous-only HTTP client that eliminates the async
runtime entirely. This reduces transitive dependencies from 227 to 143
and the linked dylib from 4.5 MB to 3.7 MB (-18%). The .a archive
drops from 28 MB to 26 MB, but real savings will be larger once
linked into libflutter with dead code stripping.
The network API surface is unchanged — three functions (patch check,
file download, event reporting) using POST/GET with JSON.
* chore: add ureq to spell check dictionary
* refactor: use into_body() instead of body_mut() where response is consumed
* fix: simplify network error matching to avoid fragile string checks
Consolidate HostNotFound, ConnectionFailed, and all Io errors into
a single network-error arm instead of pattern-matching on error
message strings that could change across OS versions or locales.
* chore: add TODO for misleading network error message
Eric Seidel