fix: el-button组件和其他部分使用到相关变量的组件无法适配主题色变化问题

src/store/modules/app.ts

@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia'
 import { store } from '../index'
 import { setCssVar, humpToUnderline } from '@/utils'
+import { mix } from '@/utils/color'
 import { ElMessage, ComponentSize } from 'element-plus'
 
 interface AppState {
@@ -239,6 +240,7 @@ export const useAppStore = defineStore('app', {
         document.documentElement.classList.add('light')
         document.documentElement.classList.remove('dark')
       }
+      this.setPrimaryLight()
     },
     setCurrentSize(currentSize: ComponentSize) {
       this.currentSize = currentSize
@@ -253,9 +255,21 @@ export const useAppStore = defineStore('app', {
       for (const key in this.theme) {
         setCssVar(`--${humpToUnderline(key)}`, this.theme[key])
       }
+      this.setPrimaryLight()
     },
     setFooter(footer: boolean) {
       this.footer = footer
+    },
+    setPrimaryLight() {
+      if (this.theme.elColorPrimary) {
+        const elColorPrimary = this.theme.elColorPrimary
+        const color = this.isDark ? '#000000' : '#ffffff'
+        const lightList = [3, 5, 7, 8, 9]
+        lightList.forEach((v) => {
+          setCssVar(`--el-color-primary-light-${v}`, mix(color, elColorPrimary, v / 10))
+        })
+        setCssVar(`--el-color-primary-dark-2`, mix(color, elColorPrimary, 0.2))
+      }
     }
   },
   persist: true

src/utils/color.ts

@@ -151,3 +151,22 @@ const subtractLight = (color: string, amount: number) => {
   const c = cc < 0 ? 0 : cc
   return c.toString(16).length > 1 ? c.toString(16) : `0${c.toString(16)}`
 }
+
+/**
+ * Mixes two colors.
+ *
+ * @param {string} color1 - The first color, should be a 6-digit hexadecimal color code starting with `#`.
+ * @param {string} color2 - The second color, should be a 6-digit hexadecimal color code starting with `#`.
+ * @param {number} [weight=0.5] - The weight of color1 in the mix, should be a number between 0 and 1, where 0 represents 100% of color2, and 1 represents 100% of color1.
+ * @returns {string} The mixed color, a 6-digit hexadecimal color code starting with `#`.
+ */
+export const mix = (color1: string, color2: string, weight: number = 0.5): string => {
+  let color = '#'
+  for (let i = 0; i <= 2; i++) {
+    const c1 = parseInt(color1.substring(1 + i * 2, 3 + i * 2), 16)
+    const c2 = parseInt(color2.substring(1 + i * 2, 3 + i * 2), 16)
+    const c = Math.round(c1 * weight + c2 * (1 - weight))
+    color += c.toString(16).padStart(2, '0')
+  }
+  return color
+}