[ci] Generate Wails bindings in release, bump wails to alpha.91

The bindings under client/ui/frontend/bindings are gitignored (1ebb507),
so the release UI job has to regenerate them before pnpm build — the
@wailsio/runtime Vite plugin refuses to build without them. Add a
wails3 CLI install step (version derived from go.mod via go list -m,
so it stays in sync with the runtime the binary links against), plus a
goreleaser before-hook that runs `wails3 generate bindings -clean=true
-ts` ahead of the existing pnpm install + pnpm build pair.

Bump github.com/wailsapp/wails/v3 to v3.0.0-alpha.91 in the process.
The @wailsio/runtime npm package stays at "latest" since the registry
only goes up to alpha.79 — the binding generator and the runtime stay
compatible across that gap until the binding shape changes.

.github/workflows/release.yml

@@ -379,6 +379,12 @@ jobs:
           echo "/tmp/llvm-mingw-20250709-ucrt-ubuntu-22.04-x86_64/bin" >> $GITHUB_PATH
       - name: Install goversioninfo
         run: go install github.com/josephspurrier/goversioninfo/cmd/goversioninfo@233067e
+      - name: Install wails3 CLI
+        # Version derived from go.mod so the binding generator always matches
+        # the wails runtime the binary links against.
+        run: |
+          WAILS_VERSION=$(go list -m -f '{{.Version}}' github.com/wailsapp/wails/v3)
+          go install github.com/wailsapp/wails/v3/cmd/wails3@$WAILS_VERSION
       - name: Generate windows syso amd64
         run: goversioninfo -64 -icon client/ui/build/windows/icon.ico -manifest client/ui/build/windows/wails.exe.manifest -product-name ${{ env.PRODUCT_NAME }}-"UI" -copyright "${{ env.COPYRIGHT }}" -ver-major ${{ steps.semver_parser.outputs.major }} -ver-minor ${{ steps.semver_parser.outputs.minor }} -ver-patch ${{ steps.semver_parser.outputs.patch }} -ver-build 0 -file-version ${{ steps.semver_parser.outputs.fullversion }}.0 -product-version ${{ steps.semver_parser.outputs.fullversion }}.0 -o client/ui/resources_windows_amd64.syso
       - name: Generate windows syso arm64