Feat/promote sync tauri version (#368)

* ci(release): sync Cargo/tauri versions after npm version on promote

Keep bundle artifact names aligned with package.json by updating
src-tauri/Cargo.toml and tauri.conf.json when promoting channel branches.

Made-with: Cursor

* ci(release): sync Cargo/tauri in post-release dev bump PR

Run the same package.json→Tauri sync after bumping main to the next -dev
version so local builds match auto-generated PR contents.

scripts/sync-tauri-version-from-package.js

@@ -0,0 +1,30 @@
+#!/usr/bin/env node
+/**
+ * Align src-tauri/Cargo.toml and src-tauri/tauri.conf.json with package.json "version".
+ * Used after npm version in promote workflows so bundle names match release semver.
+ */
+const fs = require('fs');
+const path = require('path');
+
+const root = path.join(__dirname, '..');
+const version = require(path.join(root, 'package.json')).version;
+if (!version || typeof version !== 'string') {
+  console.error('package.json version missing');
+  process.exit(1);
+}
+
+const cargoPath = path.join(root, 'src-tauri', 'Cargo.toml');
+let cargo = fs.readFileSync(cargoPath, 'utf8');
+if (!/^version = "[^"]*"$/m.test(cargo)) {
+  console.error('Cargo.toml: expected a package-level line: version = "..."');
+  process.exit(1);
+}
+cargo = cargo.replace(/^version = "[^"]*"$/m, `version = "${version}"`);
+fs.writeFileSync(cargoPath, cargo);
+console.log(`Cargo.toml -> ${version}`);
+
+const confPath = path.join(root, 'src-tauri', 'tauri.conf.json');
+const conf = JSON.parse(fs.readFileSync(confPath, 'utf8'));
+conf.version = version;
+fs.writeFileSync(confPath, JSON.stringify(conf, null, 2) + '\n');
+console.log(`tauri.conf.json -> ${version}`);