chore: 清理 src 下 33 项死代码和类型断言

删除未使用的文件/目录（mcp/adapter、cli/update.ts 等）、
未使用的重导出文件（design-system/color.ts 等 12 个）、
7 个零引用的导出函数、修复 5 处 as any 为精确类型。
净减少 ~1194 行代码，precheck 4077 测试全部通过。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/components/design-system/Divider.tsx

@@ -1 +0,0 @@
-export { Divider } from '@anthropic/ink';

src/components/design-system/FuzzyPicker.tsx

@@ -1 +0,0 @@
-export { FuzzyPicker } from '@anthropic/ink';

src/components/design-system/LoadingState.tsx

@@ -1 +0,0 @@
-export { LoadingState } from '@anthropic/ink';

src/components/design-system/Pane.tsx

@@ -1 +0,0 @@
-export { Pane } from '@anthropic/ink';

src/components/design-system/ProgressBar.tsx

@@ -1 +0,0 @@
-export { ProgressBar } from '@anthropic/ink';

src/components/design-system/Ratchet.tsx

@@ -1 +0,0 @@
-export { Ratchet } from '@anthropic/ink';

src/components/design-system/StatusIcon.tsx

@@ -1 +0,0 @@
-export { StatusIcon } from '@anthropic/ink';

src/components/design-system/Tabs.tsx

@@ -1 +0,0 @@
-export { Tab, Tabs, useTabHeaderFocus, useTabsWidth } from '@anthropic/ink';

src/components/design-system/ThemeProvider.tsx

@@ -1 +0,0 @@
-export { ThemeProvider, usePreviewTheme, useTheme, useThemeSetting } from '@anthropic/ink';

src/components/design-system/ThemedBox.tsx

@@ -1 +0,0 @@
-export { Box as default } from '@anthropic/ink';

src/components/design-system/color.ts

@@ -1,29 +0,0 @@
-import { type ColorType, colorize, type Color } from '@anthropic/ink'
-import { getTheme, type Theme, type ThemeName } from '../../utils/theme.js'
-
-/**
- * Curried theme-aware color function. Resolves theme keys to raw color
- * values before delegating to the ink renderer's colorize.
- */
-export function color(
-  c: keyof Theme | Color | undefined,
-  theme: ThemeName,
-  type: ColorType = 'foreground',
-): (text: string) => string {
-  return text => {
-    if (!c) {
-      return text
-    }
-    // Raw color values bypass theme lookup
-    if (
-      c.startsWith('rgb(') ||
-      c.startsWith('#') ||
-      c.startsWith('ansi256(') ||
-      c.startsWith('ansi:')
-    ) {
-      return colorize(text, c, type)
-    }
-    // Theme key lookup
-    return colorize(text, getTheme(theme)[c as keyof Theme], type)
-  }
-}