Fix test.yml: build + stage sidecar before Tauri shell tests

The Tauri build script validates sidecar resource paths even during
cargo test. Build and stage the openhuman binary so Tauri shell tests
can run, catching real integration issues early.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: CodeGhost21

.github/workflows/test.yml

@@ -101,6 +101,8 @@ jobs:
       - name: Test core crate (openhuman)
         run: cargo test -p openhuman
 
+      # Tauri build script validates sidecar resource paths even during cargo test,
+      # so the openhuman binary must be built and staged before shell tests can run.
       - name: Build sidecar core binary
         run: cargo build --manifest-path Cargo.toml --release --target x86_64-unknown-linux-gnu --bin openhuman