fix: exclude subpackages from Python package discovery

When src/ is itself a Python package (has __init__.py), don't search
inside it for additional packages. Anything inside would be a subpackage,
not a separate top-level package.

This fixes Scrapy template detection where src/ contains both __init__.py
and a spiders/ subpackage with its own __init__.py.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: vdusek

src/lib/hooks/useCwdProject.ts

@@ -329,9 +329,12 @@ async function discoverPythonPackages(cwd: string): Promise<string[]> {
 	const level1Packages = await findPackagesInDir(cwd);
 	packages.push(...level1Packages.map((p) => p.name));
 
-	// Search level 2 (src/)
+	// Search level 2 (src/) - only if src/ is NOT itself a package
+	// If src/ has __init__.py, it's a package and anything inside is a subpackage, not a top-level package
 	const srcDir = join(cwd, 'src');
-	if (await dirExists(srcDir)) {
+	const srcIsPackage = await fileExists(join(srcDir, '__init__.py'));
+
+	if ((await dirExists(srcDir)) && !srcIsPackage) {
 		const level2Packages = await findPackagesInDir(srcDir);
 		packages.push(...level2Packages.map((p) => `src.${p.name}`));
 	}