assets: Avoid duplicate WASM symbols with Iroh

[domenkozar]

Description

Use standard reqwest 0.13 for WASM icon downloads, with default features disabled. The assets crate currently uses the workspace's gpui-pre-reqwest 0.12 dependency. When an application also uses Iroh 1.2 in its WASM bundle, Iroh brings in reqwest 0.13. Linking the two versions of wasm-streams then fails with duplicate IntoUnderlyingByteSource and related symbols.

This keeps the workspace dependency used by other crates and changes only the assets crate's WASM dependency. Its reqwest::get, response status, and bytes calls remain the same.

AI assistance: Codex helped reproduce the failure, prepare the manifest change, and write this description. Human review is still pending.

Screenshot

Not applicable; this changes a WASM dependency and has no intended visual change.

How to Test

To reproduce against current main, temporarily add this dependency to crates/story-web/Cargo.toml:

iroh = { version = "1.1", default-features = false, features = ["tls-ring"] }

At the start of run in crates/story-web/src/lib.rs, temporarily add:

let _iroh = iroh::Endpoint::builder(iroh::endpoint::presets::Minimal);

Then build the release WASM target:

RUSTC_BOOTSTRAP=1 cargo rustc -p gpui-component-story-web --release --target wasm32-unknown-unknown -- -C link-arg=-zstack-size=8388608

RUSTC_BOOTSTRAP=1 was needed for the local stable toolchain; the repository's nightly toolchain is another option. Before this change, rust-lld reported duplicate symbols from two wasm-streams versions. With this change, the same release build completed. The temporary Iroh edits are not included in this PR.

The committed assets crate also passed cargo check -p gpui-kit-assets --target wasm32-unknown-unknown --lib with the updated lockfile. git diff --check passed.

Checklist

• I have read the CONTRIBUTING document and followed the guidelines.
• Reviewed the changes in this PR and confirmed AI generated code (If any) is accurate. Human review pending.
• Passed cargo run for story tests related to the changes. This is a WASM dependency change; the release web story build passed with the reproduction dependency.
• Tested macOS, Windows and Linux platforms performance (if the change is platform-specific). This change is WASM-only.