fix: presigned upload URLs, card badge alignment, filter menu UX, floating save

- Presigned upload URLs were signed against STORAGE_ENDPOINT (the
  internal docker hostname, e.g. http://minio:9000) instead of a
  browser-reachable URL — uploads/edits with photos were broken in
  prod. Now signed with a separate client bound to STORAGE_PUBLIC_URL,
  which also needed threading through as a Docker build arg (CSP
  headers are computed at build time) and into compose.prod.yml/
  .env.production (gitignored, not committed).
- recipe-form.tsx used the wrong i18n namespace for the visibility
  label (t("recipeForm") instead of t_recipe("recipe")), causing
  MISSING_MESSAGE in French.
- Compact recipe-list view: batch-cook rows showed no dish count, and
  the date/difficulty columns shifted per-row depending on whether a
  difficulty badge was present — reserved a fixed-width slot for it.
- All three card icon badges (batch-cook, favorite, visibility) now
  share the same muted color instead of the batch badge standing out.
- Recipes filter dropdown: clicking a filter option closed the whole
  menu, and the tag text input couldn't be typed into (the menu's
  roving-focus/type-ahead handling was intercepting keystrokes) — menu
  items now stay open on click, and the tag input stops event
  propagation so it behaves like a normal text field.
- Recipe form: added a floating save/cancel bar so long recipes don't
  require scrolling back down to save.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/messages/en.json

@@ -562,7 +562,7 @@
     "dietaryPrefsPlaceholder": "e.g. vegetarian, no shellfish",
     "anyDifficulty": "Any",
     "generate": "Generate",
-    "generating": "Generating… this can take a minute",
+    "generating": "Generating…",
     "generateSuccess": "Batch-cooking session created",
     "generateFailed": "Failed to generate"
   },

apps/web/messages/fr.json

@@ -976,8 +976,8 @@
     "reactionFailed": "Échec de la mise à jour de la réaction",
     "addReaction": "Ajouter la réaction {type}",
     "removeReaction": "Retirer la réaction {type}",
-    "favoriteAdd": "Enregistrer la recette",
-    "favoriteRemove": "Retirer la recette des enregistrements"
+    "favoriteAdd": "Favoris",
+    "favoriteRemove": "Retirer des favoris"
   },
   "cookingMode": {
     "cooking": "En cuisine",