fix(docs): correct versioned nav links and local dev version routing (#74)

docs-site/.vitepress/theme/status-line.test.ts

@@ -0,0 +1,16 @@
+import { expect, test } from 'bun:test';
+import { formatStatusLineFilePath } from './status-line';
+
+test('status line file path formats root home as index markdown', () => {
+  expect(formatStatusLineFilePath('/')).toBe('index.md');
+});
+
+test('status line file path formats version archive home without trailing slash', () => {
+  expect(formatStatusLineFilePath('/v/0.12.0/')).toBe('v/0.12.0.md');
+});
+
+test('status line file path keeps normal docs routes as markdown files', () => {
+  expect(formatStatusLineFilePath('/v/0.12.0/configuration')).toBe(
+    'v/0.12.0/configuration.md',
+  );
+});