Release 0.1.1: fix Node publish + bump everything

v0.1.0 reached crates.io, PyPI, and the wickra-wasm npm package, but
the wickra Node binding never published because the workflow called
`napi create-npm-dirs` (plural). The actual napi CLI command is
`create-npm-dir` (singular, per target).

Changes that make the next tag's release actually finish:

- workflow: replace the broken step with a loop that runs
  `napi create-npm-dir -t <triple>` for each of our four build targets.

- workflow: every registry publish step now treats "version already
  uploaded" as success. That makes re-runs (and partial-failure
  recoveries) safe instead of failing the whole job.

- bindings/node/package.json: trim the napi.triples list to the four
  platforms we actually build (linux-x64-gnu, darwin-x64, darwin-arm64,
  win32-x64-msvc). The previous defaults+9-extras configuration would
  have made napi prepublish expect platform packages we never produced.

- bindings/node/index.js: switch from local-only binary lookup to the
  proper napi loader that tries the local `.node` file first and falls
  back to the per-platform npm subpackage that's installed as an
  optional dependency in production.

- Versions across all four published packages bumped to 0.1.1 so the
  Node binding can publish for the first time alongside refreshed
  cargo/pypi/wasm artefacts.

.github/workflows/release.yml

@@ -20,24 +20,35 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
 
-      - name: Publish wickra-core
-        run: cargo publish -p wickra-core --token "$CARGO_REGISTRY_TOKEN"
+      # Idempotent publishing: if the version is already on crates.io we
+      # treat that as success so re-runs of the workflow don't fail.
+      - name: Publish wickra-core (idempotent)
+        run: |
+          out=$(cargo publish -p wickra-core --token "$CARGO_REGISTRY_TOKEN" 2>&1) && echo "$out" \
+            || (echo "$out" | grep -q "already uploaded\|already exists" && echo "skip: already published" \
+                || (echo "$out"; exit 1))
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
 
       - name: Wait for crates.io index to refresh
         run: sleep 45
 
-      - name: Publish wickra-data
-        run: cargo publish -p wickra-data --token "$CARGO_REGISTRY_TOKEN"
+      - name: Publish wickra-data (idempotent)
+        run: |
+          out=$(cargo publish -p wickra-data --token "$CARGO_REGISTRY_TOKEN" 2>&1) && echo "$out" \
+            || (echo "$out" | grep -q "already uploaded\|already exists" && echo "skip: already published" \
+                || (echo "$out"; exit 1))
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
 
       - name: Wait for crates.io index to refresh
         run: sleep 45
 
-      - name: Publish wickra
-        run: cargo publish -p wickra --token "$CARGO_REGISTRY_TOKEN"
+      - name: Publish wickra (idempotent)
+        run: |
+          out=$(cargo publish -p wickra --token "$CARGO_REGISTRY_TOKEN" 2>&1) && echo "$out" \
+            || (echo "$out" | grep -q "already uploaded\|already exists" && echo "skip: already published" \
+                || (echo "$out"; exit 1))
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
 
@@ -170,9 +181,12 @@ jobs:
           path: bindings/node/artifacts
           pattern: bindings-*
 
-      - name: Create npm/<platform>/ scaffolding
+      - name: Create npm/<platform>/ scaffolding (one per target)
         working-directory: bindings/node
-        run: npx napi create-npm-dirs
+        run: |
+          for t in x86_64-unknown-linux-gnu x86_64-apple-darwin aarch64-apple-darwin x86_64-pc-windows-msvc; do
+            npx napi create-npm-dir -t "$t" .
+          done
 
       - name: Move binaries into platform package layout
         working-directory: bindings/node
@@ -228,8 +242,11 @@ jobs:
             fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2));
           "
 
-      - name: Publish wickra-wasm to npm
+      - name: Publish wickra-wasm to npm (idempotent)
         working-directory: bindings/wasm/pkg
-        run: npm publish --access public
+        run: |
+          out=$(npm publish --access public 2>&1) && echo "$out" \
+            || (echo "$out" | grep -q "You cannot publish over" && echo "skip: version already on npm" \
+                || (echo "$out"; exit 1))
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}