Typecheck generated Typescript files (#277)

## 🎟️ Tracking

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point to where this change is coming from. -->

## 📔 Objective

The TS files generated by wasm-bindgen are not checked to be valid, so
we should do it ourselves to avoid PRs accidentally breaking the
wasm-internal NPM package: #263

## ⏰ Reminders before review

- Contributor guidelines followed
- All formatters and local linters executed and passed
- Written new unit and / or integration tests where applicable
- Protected functional changes with optionality (feature flags)
- Used internationalization (i18n) for all UI strings
- CI builds passed
- Communicated to DevOps any deployment requirements
- Updated any necessary documentation (Confluence, contributing docs) or
informed the documentation
  team

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- 👍 (`:+1:`) or similar for great changes
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that's not quite a confirmed
  issue and could potentially benefit from discussion
- 🎨 (`:art:`) for suggestions / improvements
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- ⛏ (`:pick:`) for minor or nitpick changes

Author: dani-garcia

.github/workflows/build-wasm-internal.yml

@@ -60,6 +60,9 @@ jobs:
           RUST_TOOLCHAIN="$(grep -oP '^channel.*"(\K.*?)(?=")' ../../rust-toolchain.toml)"
           echo "RUST_TOOLCHAIN=${RUST_TOOLCHAIN}" | tee -a "${GITHUB_OUTPUT}"
 
+      - name: NPM setup
+        run: npm ci
+
       - name: Install rust
         uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # stable
         with:

crates/bitwarden-wasm-internal/build.sh

@@ -39,3 +39,6 @@ wasm-opt -Os ./crates/bitwarden-wasm-internal/npm/node/bitwarden_wasm_internal_b
 # Transpile to JS
 wasm2js -Os ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm -o ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js
 npx terser ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js -o ./crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal_bg.wasm.js
+
+# Typecheck the generated TypeScript definitions
+npx tsc --noEmit --lib es2015 crates/bitwarden-wasm-internal/npm/bitwarden_wasm_internal.d.ts

package-lock.json

@@ -20,6 +20,7 @@
   },
   "devDependencies": {
     "@openapitools/openapi-generator-cli": "2.20.0",
-    "prettier": "3.5.3"
+    "prettier": "3.5.3",
+    "typescript": "5.8.3"
   }
 }