fix: 修复全部27个失败的e2e测试

根本原因: 所有测试硬编码了只在生产环境有效的admin token，
CI创建新数据库时token不同导致全部认证失败。

修复:
- CI: 设置已知ADMIN_TOKEN环境变量传给后端和Cypress
- cypress/support/e2e.js: 新增cy.getAdminToken()动态获取token
- 24个spec文件: 硬编码token改为cy.getAdminToken()
- UI选择器: 适配管理页面从tab移到UserMenu、编辑器DOM变化
- API: create_recipe→share_recipe、ingredients格式、权限变化
- 超时: 300s→420s适应32个spec

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

frontend/cypress/e2e/visual-check.cy.js

@@ -1,47 +1,49 @@
-// Quick visual screenshots for manual review before deploy
-const ADMIN_TOKEN = 'c86ae7afbe10fabe3c1d5e1a7fee74feaadfd5dc7be2ab62'
-
 describe('Visual Check - Screenshots', () => {
+  let adminToken
+
+  before(() => {
+    cy.getAdminToken().then(token => { adminToken = token })
+  })
+
   it('homepage with recipes', () => {
-    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.get('.recipe-card', { timeout: 10000 }).should('have.length.gte', 1)
     cy.wait(1000)
     cy.screenshot('01-homepage')
   })
 
   it('recipe detail overlay', () => {
-    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.get('.recipe-card', { timeout: 10000 }).first().click()
     cy.wait(1000)
     cy.screenshot('02-recipe-detail')
   })
 
   it('oil reference page', () => {
-    cy.visit('/oils', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/oils', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.get('.oil-chip', { timeout: 10000 }).should('have.length.gte', 1)
     cy.wait(500)
     cy.screenshot('03-oil-reference')
   })
 
   it('manage recipes page', () => {
-    cy.visit('/manage', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/manage', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.wait(2000)
     cy.screenshot('04-manage-recipes')
   })
 
   it('inventory page', () => {
-    cy.visit('/inventory', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/inventory', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.wait(1500)
     cy.screenshot('05-inventory')
   })
 
   it('check if recipe cards show price > 0', () => {
-    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', ADMIN_TOKEN) } })
+    cy.visit('/', { onBeforeLoad(win) { win.localStorage.setItem('oil_auth_token', adminToken) } })
     cy.get('.recipe-card', { timeout: 10000 }).should('have.length.gte', 1)
     // Check if any card shows a non-zero price
     cy.get('.recipe-card').first().invoke('text').then(text => {
       cy.log('First card text: ' + text)
-      // Check if it contains a price like ¥ X.XX where X > 0
       const priceMatch = text.match(/¥\s*(\d+\.?\d*)/)
       if (priceMatch) {
         cy.log('Price found: ¥' + priceMatch[1])