perf: reduce startup work and fix grade analytics bar chart animation

Batch settings storage writes, tier plugin startup, lazy-load heavy UI
chunks, and optimize global search indexing. Stop tweening bar height in
grade analytics to prevent invalid negative SVG rect values.

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

src/interface/components/themes/ThemeSelector.svelte

@@ -2,8 +2,6 @@
   import type { CustomTheme, ThemeList } from '@/types/CustomThemes'
   import { onDestroy, onMount } from 'svelte'
   import browser from 'webextension-polyfill'
-  import { OpenThemeCreator } from '@/plugins/built-in/themes/ThemeCreator'
-  import { OpenStorePage } from '@/seqta/ui/renderStore'
   import { themeUpdates } from '@/interface/hooks/ThemeUpdates'
   import { closeExtensionPopup } from '@/seqta/utils/Closers/closeExtensionPopup'
   import { ThemeManager } from '@/plugins/built-in/themes/theme-manager'
@@ -127,6 +125,17 @@
     }
   }
 
+  const openStorePage = async () => {
+    const { OpenStorePage } = await import('@/seqta/ui/renderStore')
+    OpenStorePage()
+  }
+
+  const openThemeCreator = async (themeId?: string) => {
+    const { OpenThemeCreator } = await import('@/plugins/built-in/themes/ThemeCreator')
+    OpenThemeCreator(themeId)
+    closeExtensionPopup()
+  }
+
   const handleToggleFavorite = async (theme: CustomTheme, e: MouseEvent) => {
     e.stopPropagation();
     if (!cloudLoggedIn) {
@@ -212,8 +221,8 @@
             </div>
             <div
               class="absolute z-20 flex w-8 h-8 p-2 text-white transition-all rounded-full delay-[20ms] opacity-0 top-1/4 right-2 bg-black/50 place-items-center group-hover:opacity-100 group-hover:top-1/2 -translate-y-1/2"
-              onclick={(event) => { event.stopPropagation(); OpenThemeCreator(theme.id); closeExtensionPopup() }}
-              onkeydown={(event) => { if (event.key === 'Enter' || event.key === ' ') OpenThemeCreator(theme.id); closeExtensionPopup() }}
+              onclick={(event) => { event.stopPropagation(); void openThemeCreator(theme.id) }}
+              onkeydown={(event) => { if (event.key === 'Enter' || event.key === ' ') void openThemeCreator(theme.id) }}
               role="button"
               tabindex="-1"
             >
@@ -261,7 +270,7 @@
     {/if}
 
     <button
-      onclick={() => OpenStorePage()}
+      onclick={() => void openStorePage()}
       class="flex justify-center items-center w-full rounded-xl transition aspect-theme bg-zinc-100 dark:bg-zinc-900 dark:text-white"
     >
       <span class="text-xl font-IconFamily">&#xecc5;</span>
@@ -269,7 +278,7 @@
     </button>
 
     <button
-      onclick={() => { OpenThemeCreator(); closeExtensionPopup() }}
+      onclick={() => void openThemeCreator()}
       class="flex justify-center items-center w-full rounded-xl transition aspect-theme bg-zinc-100 dark:bg-zinc-900 dark:text-white"
     >
       <span class="text-xl font-IconFamily">&#xec60;</span>