feat(convert,assets): convert page route and assets portfolio chart

Add convert mobile/desktop views and assets chart from price history; polish calculator and wallet/home integration.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/App.vue

@@ -110,7 +110,6 @@
   />
 
   <GoldDayCalculatorModal />
-  <CopperConvertModal />
 </template>
 
 <script lang="ts" setup>
@@ -133,7 +132,6 @@ import { usePwaInstall } from '@/composables/usePwaInstall'
 import PwaInstallBanner from '@/components/pwa/PwaInstallBanner.vue'
 import PwaInstallGuideModal from '@/components/pwa/PwaInstallGuideModal.vue'
 import GoldDayCalculatorModal from '@/components/GoldDayCalculatorModal.vue'
-import CopperConvertModal from '@/components/CopperConvertModal.vue'
 import { useUserStore } from '@/store/userStore'
 import { useSettingsStore } from '@/store/settingsStore'
 import {