fix: require a digit in loader versions

CHANGELOG.md

@@ -9,7 +9,8 @@ All notable changes to ModShift are documented here. The format follows
 ### Fixed
 
 - `migrate` (and the config and web UI) now reject a loader version that is not a version, such
-  as a `<version>` placeholder copied from an example, instead of writing an invalid pack.
+  as a `<version>` or `X.Y.Z` placeholder copied from an example (a version must contain a
+  digit), instead of writing an invalid pack.
 - Unrelated alternatives: a popular mod sharing only a broad category (e.g. Xaero's Minimap for
   CIT Resewn) is no longer suggested; a candidate needs a similar name or two shared keywords
   (one generic word such as "screen" is not enough).

src/loaders/loaderVersion.ts

@@ -1,10 +1,11 @@
 // Format d'une version de loader écrite dans un .mrpack (ex. 0.16.5, 21.1.77, 47.3.0,
-// 0.27.1-beta.1). Refuse ce qui n'est clairement pas une version (ex. « <version> » recopié
-// d'un exemple), sans prétendre vérifier qu'elle existe.
+// 0.27.1-beta.1). Refuse ce qui n'est clairement pas une version (ex. « <version> » ou « X.Y.Z »
+// recopiés d'un exemple : toute vraie version contient un chiffre), sans prétendre vérifier
+// qu'elle existe.
 const LOADER_VERSION_PATTERN = /^[0-9A-Za-z][0-9A-Za-z.+_-]{0,63}$/;
 
 export function isValidLoaderVersion(value: string): boolean {
-  return LOADER_VERSION_PATTERN.test(value);
+  return LOADER_VERSION_PATTERN.test(value) && /[0-9]/.test(value);
 }
 
 export function invalidLoaderVersionMessage(value: string): string {

test/loaders/loaderVersion.test.ts

@@ -14,10 +14,17 @@ describe('loader version format', () => {
     (version) => expect(isValidLoaderVersion(version)).toBe(true),
   );
 
-  it.each(['<version>', '', ' 0.16.5', '0.16 .5', '-0.16.5', 'x'.repeat(65), '0.16.5;rm'])(
-    'rejects %j',
-    (version) => expect(isValidLoaderVersion(version)).toBe(false),
-  );
+  it.each([
+    '<version>',
+    'X.Y.Z',
+    'latest',
+    '',
+    ' 0.16.5',
+    '0.16 .5',
+    '-0.16.5',
+    'x'.repeat(65),
+    '0.16.5;rm',
+  ])('rejects %j', (version) => expect(isValidLoaderVersion(version)).toBe(false));
 
   it('rejects an invalid target.loaderVersion in the config', () => {
     expect(() => validateConfig({ target: { loaderVersion: '<version>' } }, 'c.json')).toThrow(