feat(server): build, sign, and submit Bulletin preimages in the core

.github/workflows/ci.yml

@@ -33,12 +33,18 @@ jobs:
       - uses: dtolnay/rust-toolchain@5b842231ba77f5c045dba54ac5560fed2db780e2 # stable
         with:
           toolchain: stable
+          targets: wasm32-unknown-unknown
 
       - uses: Swatinem/rust-cache@e18b497796c12c097a38f9edb9d0641fb99eee32 # v2
 
       - name: cargo build
         run: cargo build --workspace --all-targets --all-features
 
+      - name: cargo build (wasm32)
+        # Guards the wasm host bridge and its offline subxt surface, which the
+        # host-target build never compiles.
+        run: cargo build -p truapi-server --target wasm32-unknown-unknown --no-default-features
+
       - name: cargo +nightly fmt --check
         run: cargo +nightly fmt --check
 

.gitignore

@@ -55,6 +55,4 @@ js/packages/truapi/src/generated/
 js/packages/truapi/dist/generated/
 js/packages/truapi-host/src/generated/
 js/packages/truapi-host/dist/generated/
-js/packages/truapi-host-wasm/src/generated/
-js/packages/truapi-host-wasm/dist/generated/
-js/packages/truapi-host-wasm/dist/wasm/
+js/packages/truapi-host/dist/wasm/

CLAUDE.md

@@ -38,8 +38,10 @@ scripts/codegen.sh         regenerate the TS client from the Rust crate
 - `truapi-server` WASM artifacts live under
   `js/packages/truapi-host/dist/wasm/web/` and are gitignored.
   Build them locally with `make wasm` (rerun whenever
-  `rust/crates/truapi-server/` changes); CI builds the bundle fresh from the
-  Rust source on every run.
+  `rust/crates/truapi-server/` changes). CI compiles the crate for
+  `wasm32-unknown-unknown` to guard the wasm bridge and its offline subxt
+  surface, but does not build or publish the packaged bundle; run `make wasm`
+  locally before relying on the browser host.
 
 ## Code style