fix: 多项修复 — 滴数框/零售价显示/精油英文名保存/再次审核通知

1. 编辑配方的滴数输入框从 42px 加宽到 58px，确保 50.5 不被 spinner 遮挡
2. 配方卡片在零售价==会员价时也显示零售价（之前因 retail>cost 过滤掉）
3. 精油价目英文名保存后被静态 OIL_CARDS 覆盖，把 getEnglishName 的优先级改
   为先用 DB meta.enName，解决温柔呵护/仕女呵护等显示不更新的问题
4. 再次审核 tag 的配方被非管理员修改时，给管理员发通知，内容含前后 diff
5. 对应 vitest + cypress 测试各一组

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/main.py

@@ -887,6 +887,11 @@ def update_recipe(recipe_id: int, update: RecipeUpdate, user=Depends(get_current
             conn.close()
             raise HTTPException(409, "此配方已被其他人修改，请刷新后重试")
 
+    # Snapshot before state for re-review diff notification
+    before_row = c.execute("SELECT name, note, en_name, volume FROM recipes WHERE id = ?", (recipe_id,)).fetchone()
+    before_ings = [dict(r) for r in c.execute("SELECT oil_name, drops FROM recipe_ingredients WHERE recipe_id = ?", (recipe_id,)).fetchall()]
+    before_tags = set(r["tag_name"] for r in c.execute("SELECT tag_name FROM recipe_tags WHERE recipe_id = ?", (recipe_id,)).fetchall())
+
     if update.name is not None:
         c.execute("UPDATE recipes SET name = ? WHERE id = ?", (update.name, recipe_id))
         # Re-translate en_name if name changed and no explicit en_name provided
@@ -925,6 +930,35 @@ def update_recipe(recipe_id: int, update: RecipeUpdate, user=Depends(get_current
     log_audit(conn, user["id"], "update_recipe", "recipe", recipe_id,
               rname["name"] if rname else update.name,
               json.dumps({"changed": "、".join(changed)}, ensure_ascii=False) if changed else None)
+
+    # Notify admin when non-admin user edits a recipe tagged 再次审核
+    after_tags = before_tags if update.tags is None else set(update.tags)
+    needs_review = "再次审核" in (before_tags | after_tags)
+    if user.get("role") != "admin" and needs_review and changed:
+        after_row = c.execute("SELECT name, note, en_name, volume FROM recipes WHERE id = ?", (recipe_id,)).fetchone()
+        after_ings = [dict(r) for r in c.execute("SELECT oil_name, drops FROM recipe_ingredients WHERE recipe_id = ?", (recipe_id,)).fetchall()]
+        diff_lines = []
+        def _fmt_ings(ings):
+            return "、".join(f"{i['oil_name']} {i['drops']}" for i in ings) or "（空）"
+        if update.name is not None and before_row["name"] != after_row["name"]:
+            diff_lines.append(f"名称：{before_row['name']} → {after_row['name']}")
+        if update.ingredients is not None and before_ings != after_ings:
+            diff_lines.append(f"成分：{_fmt_ings(before_ings)} → {_fmt_ings(after_ings)}")
+        if update.tags is not None and before_tags != after_tags:
+            diff_lines.append(f"标签：{'、'.join(sorted(before_tags)) or '（空）'} → {'、'.join(sorted(after_tags)) or '（空）'}")
+        if update.note is not None and (before_row["note"] or "") != (after_row["note"] or ""):
+            diff_lines.append(f"备注：{before_row['note'] or '（空）'} → {after_row['note'] or '（空）'}")
+        if update.en_name is not None and (before_row["en_name"] or "") != (after_row["en_name"] or ""):
+            diff_lines.append(f"英文名：{before_row['en_name'] or '（空）'} → {after_row['en_name'] or '（空）'}")
+        if diff_lines:
+            editor = user.get("display_name") or user.get("username") or f"user#{user['id']}"
+            title = f"📝 再次审核配方被修改：{after_row['name']}"
+            body = f"{editor} 修改了配方「{after_row['name']}」：\n\n" + "\n".join(diff_lines)
+            conn.execute(
+                "INSERT INTO notifications (target_role, title, body) VALUES (?, ?, ?)",
+                ("admin", title, body),
+            )
+
     conn.commit()
     conn.close()
     return {"ok": True}