feat(recipes): redesign recipe detail modal with three-column workspace layout

- Three-column layout (preview | generation parameters | resources) with
  independent per-pane scrolling and a content-sized modal shell that
  shrinks to fit short recipes and caps at viewport height for long ones
- Blurred, darker backdrop to focus attention on the modal
- Preview frame hugs the image instead of a fixed-size box
- Move recipe-level 'Send to ComfyUI' into the header actions row to match
  the model detail modal convention; remove the modal 'Copy Recipe Syntax'
  button (context menu action is unaffected)
- Add recipes.actions.sendRecipe i18n keys with translations
- Sync modal test fixtures to the new structure

locales/fr.json

@@ -853,7 +853,8 @@
     "recipes": {
         "title": "LoRA Recipes",
         "actions": {
-            "sendCheckpoint": "Envoyer vers ComfyUI"
+            "sendCheckpoint": "Envoyer vers ComfyUI",
+            "sendRecipe": "Envoyer vers ComfyUI"
         },
         "controls": {
             "import": {