fix(desktop): stamp the release version into the build (#2779)

A local Wails build produced an exe with a blank "File version" in its Windows
properties. wails.json's info block carried no productVersion, so the generated
versioninfo template resolved `{{.Info.ProductVersion}}` to empty and the binary
shipped with no usable file version.

Fill the info block (companyName, productVersion, copyright) and have
desktop-build.sh stamp productVersion from the tag before `wails build` —
numeric only, since a leading "v" breaks goversioninfo's fixed-version parse.
The same productVersion feeds the macOS bundle version. Verified the exe's
FileVersionRaw now reads the tag version.

Co-authored-by: reasonix <[email protected]>

scripts/desktop-build.sh

@@ -25,6 +25,12 @@ BINNAME="reasonix-desktop"    # wails.json outputfilename -> linux binary name
 
 cd "$ROOT/desktop"
 
+# Stamp the version resource (Windows file properties, macOS CFBundleVersion) from
+# the tag. Wails reads info.productVersion from wails.json; goversioninfo needs it
+# numeric, so a leading "v" must go or the whole version block is silently dropped.
+numver="${VERSION#v}"
+node -e 'const fs=require("fs"),f="wails.json",j=JSON.parse(fs.readFileSync(f,"utf8"));j.info.productVersion=process.argv[1];fs.writeFileSync(f,JSON.stringify(j,null,2)+"\n")' "$numver"
+
 # NSIS installer is Windows-only (Wails requires a single windows target for -nsis).
 build_args=(-clean -platform "$PLATFORM" -ldflags "-X main.version=$VERSION")
 [ "$os" = windows ] && build_args+=(-nsis)