test: 更新单元测试覆盖智能识别新功能和share_recipe日志

- parseOilChunk: 无数字默认1滴、混合格式、_ml标记
- findOil: 2字不模糊匹配、同音词和子串仍可用
- parseMultiRecipes: 多配方分割、空行/分号、名称识别、去重
- e2e: audit-log create_recipe → share_recipe

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

frontend/cypress/e2e/audit-log-advanced.cy.js

@@ -41,7 +41,7 @@ describe('Audit Log Advanced', () => {
       const recipeId = createRes.body.id
       // Check audit log
       cy.request({ url: '/api/audit-log?limit=5&offset=0', headers: authHeaders }).then(res => {
-        const entry = res.body.find(e => e.action === 'create_recipe' && e.target_name === 'Cypress审计测试')
+        const entry = res.body.find(e => e.action === 'share_recipe' && e.target_name === 'Cypress审计测试')
         expect(entry).to.exist
       })
       // Cleanup