Feature/post media translations (#42)

* chore: updated todo with translation ideas

* feat: first take at the implementation of translations

* fix: small addition for the translation feature

* feat: support language switching in the editor and preview

* feat: better handling of long bodies by not running them through a json envelope

* fix: unknown macros have better fallback

* feat: api for python to get translations

* fix: strip dumb prefix of content in translation

* feat: extend meta diff for translations

* feat: hook up translations to rebuild-from-disk

* feat: generation of the website prefers project language, falling back to canonical language

* fix: crashes during rendering

* feat: translation validation report

* fix: made the translation validation actually work

* chore: reorganization of menu

* fix: some topics cleanup

* chore: updated doc

* feat: translations for media

* feat: more aligned in UI/UX

* feat: edit translations possible

* chore: added full multi-language todo

* chore: updated todo for clarity

* feat: implementation of full multi-linguality

* fix: page creation creates pages

* fix: flags on every page

* fix: better prompt

* feat: made MCP server aware of language content

* feat: python tools for translations

* fix: better fill-in-translations

* fix: better prompt for translation. maybe.

* fix: losing posts from search due to translation process

* fix: translation validation handles in-db content and fill-in of missing translations fixed to flush

* fix: faster scanning for infilling of missing translations

* chore: updated agent instructions

* feat: calendar and tag cloud respect current language now

* fix: retries going up

* fix: got metadata-diff and rebuild into sync

* fix: extended meta-diff for timestamps

* fix: made website validation look at translated content, too

* fix: multi-lingual search

* chore: refactor Editor.tsx into two separate editors

* feat: do language detection when no explicit language given

---------

Co-authored-by: hugo <hugoms@me.com>

tests/engine/mainProcessPythonApiInvoker.test.ts

@@ -12,6 +12,9 @@ const mockPostEngine: Record<string, ReturnType<typeof vi.fn>> = {
   updatePost: vi.fn().mockResolvedValue(null),
   deletePost: vi.fn().mockResolvedValue(true),
   publishPost: vi.fn().mockResolvedValue(null),
+  publishPostTranslation: vi.fn().mockResolvedValue({ id: 'tr1', language: 'fr' }),
+  getPostTranslation: vi.fn().mockResolvedValue({ id: 'tr1', language: 'en', content: 'hello' }),
+  getPostTranslations: vi.fn().mockResolvedValue([{ id: 'tr1', language: 'en' }]),
   discardChanges: vi.fn().mockResolvedValue(null),
   hasPublishedVersion: vi.fn().mockResolvedValue(false),
   rebuildDatabaseFromFiles: vi.fn().mockResolvedValue(undefined),
@@ -431,6 +434,21 @@ describe('invokeMainProcessPythonApi', () => {
       expect(mockPostEngine.isSlugAvailable).toHaveBeenCalledWith('test', undefined);
     });
 
+    it('routes posts.publishTranslation to postEngine.publishPostTranslation', async () => {
+      await invokeMainProcessPythonApi('posts.publishTranslation', { postId: 'p1', language: 'fr' });
+      expect(mockPostEngine.publishPostTranslation).toHaveBeenCalledWith('p1', 'fr');
+    });
+
+    it('routes posts.getTranslation to postEngine.getPostTranslation', async () => {
+      await invokeMainProcessPythonApi('posts.getTranslation', { postId: 'p1', language: 'en' });
+      expect(mockPostEngine.getPostTranslation).toHaveBeenCalledWith('p1', 'en');
+    });
+
+    it('routes posts.getTranslations to postEngine.getPostTranslations', async () => {
+      await invokeMainProcessPythonApi('posts.getTranslations', { postId: 'p1' });
+      expect(mockPostEngine.getPostTranslations).toHaveBeenCalledWith('p1');
+    });
+
     it('handles null args gracefully (normalizes to empty record)', async () => {
       await expect(
         invokeMainProcessPythonApi('posts.get', null as unknown as Record<string, unknown>),