feat(build): replace execSync with spawnSync for building backend and add integrity manifest generation for build files

scripts/build-backend.js

@@ -1,8 +1,57 @@
 #!/usr/bin/env node
 
-const { execSync } = require("child_process");
+const { spawnSync } = require("child_process");
+const fs = require("fs");
+const path = require("path");
+const crypto = require("crypto");
+
+function getFiles(dir, fileList = []) {
+    const files = fs.readdirSync(dir);
+    for (const file of files) {
+        const name = path.join(dir, file);
+        if (fs.statSync(name).isDirectory()) {
+            getFiles(name, fileList);
+        } else {
+            fileList.push(name);
+        }
+    }
+    return fileList;
+}
+
+function generateManifest(buildDir, manifestPath) {
+    console.log("Generating backend integrity manifest...");
+    const files = getFiles(buildDir);
+    const manifest = {};
+
+    for (const file of files) {
+        const relativePath = path.relative(buildDir, file);
+        const fileBuffer = fs.readFileSync(file);
+        const hash = crypto.createHash("sha256").update(fileBuffer).digest("hex");
+        manifest[relativePath] = hash;
+    }
+
+    fs.writeFileSync(manifestPath, JSON.stringify(manifest, null, 2));
+    console.log(`Manifest saved to ${manifestPath} (${Object.keys(manifest).length} files)`);
+}
+
 try {
-    execSync(`poetry run python cx_setup.py build`, { stdio: "inherit" });
+    console.log("Building backend with cx_Freeze...");
+    const result = spawnSync("poetry", ["run", "python", "cx_setup.py", "build"], { stdio: "inherit", shell: false });
+    if (result.error) {
+        throw result.error;
+    }
+    if (result.status !== 0) {
+        process.exit(result.status || 1);
+    }
+
+    const buildDir = path.join(__dirname, "..", "build", "exe");
+    const manifestPath = path.join(__dirname, "..", "electron", "backend-manifest.json");
+
+    if (fs.existsSync(buildDir)) {
+        generateManifest(buildDir, manifestPath);
+    } else {
+        console.error("Build directory not found, manifest generation skipped.");
+    }
 } catch (error) {
     console.error("Build failed:", error.message);
     process.exit(1);