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>

frontend/cypress/e2e/re-review-notify.cy.js

@@ -0,0 +1,92 @@
+// Verifies that when a non-admin edits a recipe tagged 再次审核,
+// an admin-targeted notification is created containing a before/after diff.
+describe('Re-review notification on non-admin edit', () => {
+  let adminToken
+  let viewerToken
+  let recipeId
+
+  before(() => {
+    cy.getAdminToken().then(t => {
+      adminToken = t
+      const uname = 'editor_' + Date.now()
+      cy.request({
+        method: 'POST', url: '/api/register',
+        body: { username: uname, password: 'pw12345678' }
+      }).then(res => {
+        viewerToken = res.body.token
+        // Look up user id via admin /api/users, then promote to editor
+        cy.request({ url: '/api/users', headers: { Authorization: `Bearer ${adminToken}` } })
+          .then(r => {
+            const u = r.body.find(x => x.username === uname)
+            cy.request({
+              method: 'PUT', url: `/api/users/${u.id}`,
+              headers: { Authorization: `Bearer ${adminToken}` },
+              body: { role: 'editor' },
+            })
+          })
+      })
+    })
+  })
+
+  it('creates admin notification with diff lines', () => {
+    // Editor creates their own recipe tagged 再次审核
+    cy.request({
+      method: 'POST', url: '/api/recipes',
+      headers: { Authorization: `Bearer ${viewerToken}` },
+      body: {
+        name: 're-review-fixture-' + Date.now(),
+        ingredients: [{ oil_name: '薰衣草', drops: 3 }],
+        tags: ['再次审核'],
+      },
+    }).then(res => {
+      recipeId = res.body.id
+      expect(recipeId).to.be.a('number')
+    })
+
+    // Mark notifications read so we can detect the new one
+    cy.request({
+      method: 'POST', url: '/api/notifications/read-all',
+      headers: { Authorization: `Bearer ${adminToken}` }, body: {},
+    })
+
+    // Non-admin edits the recipe
+    cy.then(() => {
+      cy.request({
+        method: 'PUT', url: `/api/recipes/${recipeId}`,
+        headers: { Authorization: `Bearer ${viewerToken}` },
+        body: {
+          ingredients: [{ oil_name: '薰衣草', drops: 5 }, { oil_name: '柠檬', drops: 2 }],
+          note: '新备注',
+        },
+      }).then(r => expect(r.status).to.eq(200))
+    })
+
+    // Admin sees a new unread notification mentioning the recipe and diff
+    cy.then(() => {
+      cy.request({ url: '/api/notifications', headers: { Authorization: `Bearer ${adminToken}` } })
+        .then(res => {
+          const unread = res.body.filter(n => !n.is_read && n.title && n.title.includes('再次审核配方被修改'))
+          expect(unread.length).to.be.greaterThan(0)
+          expect(unread[0].body).to.match(/成分|备注/)
+          expect(unread[0].body).to.contain('→')
+        })
+    })
+  })
+
+  it('admin edits do NOT create re-review notification', () => {
+    cy.request({
+      method: 'POST', url: '/api/notifications/read-all',
+      headers: { Authorization: `Bearer ${adminToken}` }, body: {},
+    })
+    cy.request({
+      method: 'PUT', url: `/api/recipes/${recipeId}`,
+      headers: { Authorization: `Bearer ${adminToken}` },
+      body: { note: '管理员备注' },
+    })
+    cy.request({ url: '/api/notifications', headers: { Authorization: `Bearer ${adminToken}` } })
+      .then(res => {
+        const unread = res.body.filter(n => !n.is_read && n.title && n.title.includes('再次审核配方被修改'))
+        expect(unread.length).to.eq(0)
+      })
+  })
+})