[CI] Pin TypeScript toolchain for the ArkAnalyzer build

ArkAnalyzer is installed without a lockfile, so 'typescript' and
'@types/node' float to the latest versions on every CI run. A recent
'@types/node' release is not parseable by the TypeScript version the
project builds with, failing 'npm run build' in the ci-ts job. Pin a
known-good toolchain with 'npm install --no-save'.

Author: CaelmBleidd

.github/workflows/ci.yml

@@ -149,6 +149,14 @@ jobs:
           cd $DEST_DIR
 
           npm install
+          # ArkAnalyzer has no lockfile, and 'typescript'/'@types/node' are resolved
+          # transitively, so a fresh 'npm install' floats them to the latest versions.
+          # New '@types/node' releases are not parseable by the TypeScript version
+          # ArkAnalyzer builds with, which breaks 'npm run build'.
+          # Pin a known-good toolchain without touching package.json
+          # ('ohos-typescript' must be re-installed explicitly: npm prunes it
+          # otherwise, because it is only listed in bundleDependencies).
+          npm install --no-save typescript@5.4.5 @types/node@24.0.0 ohos-typescript@4.9.5-r10
           npm run build
 
       - name: Run TS tests