feat(V2-1a): Monorepo 구조 전환 — apps/desktop으로 V1 이동

- npm workspaces 루트 (apps/*, packages/*) 세팅
- V1 전체를 apps/desktop/으로 git mv (src, resources, tests, sidecar,
  scripts, electron.vite.config.ts, electron-builder.yml, vitest.config.ts,
  tsconfig.node.json, tsconfig.web.json)
- apps/desktop/package.json 신규 (name=@d3ro/desktop)
- productName: 'd3ro-voice' 명시 — app.getName()을 고정하여 userData 경로
  %APPDATA%\d3ro-voice\ 그대로 유지 (기존 DB/설정 연속성 보장)
- 루트 package.json을 workspace 루트로 재구성, 공통 devDep만 유지
  (typescript, eslint, prettier)
- turbo.json, tsconfig.base.json 추가 (Turborepo 자체 설치는 별도 sub-phase)
- memory/project_status.md 생성 (규칙 13)

검증:
- npm run typecheck 통과
- npm run build 통과 (electron-vite main+preload+renderer)
- npm run dev 실제 실행 → DB/핫키/Ollama 자동 실행 모두 정상

apps/desktop/src/renderer/components/ProBadge.tsx

@@ -0,0 +1,78 @@
+// src/renderer/components/ProBadge.tsx
+// Feature gate badge: renders children normally if unlocked,
+// shows lock overlay with PRO badge if locked.
+
+import { Box, Typography } from '@mui/material'
+import LockIcon from '@mui/icons-material/Lock'
+import { d3roPalette, d3roFontMono, d3roTypo, d3roRadius } from '../theme'
+import { useProFeature } from '../hooks/useProFeature'
+import { useI18n } from '../i18n'
+import type { Feature } from '@shared/types'
+
+interface ProBadgeProps {
+  feature: Feature
+  children: React.ReactNode
+}
+
+export function ProBadge({ feature, children }: ProBadgeProps): React.ReactElement {
+  const { t } = useI18n()
+  const { unlocked, loading, showUpgrade } = useProFeature(feature)
+
+  // While loading or if unlocked, render children normally
+  if (loading || unlocked) {
+    return <>{children}</>
+  }
+
+  return (
+    <Box sx={{ position: 'relative' }}>
+      {/* Children rendered with reduced opacity */}
+      <Box sx={{ opacity: 0.35, pointerEvents: 'none', filter: 'grayscale(0.6)' }}>
+        {children}
+      </Box>
+
+      {/* Lock overlay */}
+      <Box
+        onClick={showUpgrade}
+        sx={{
+          position: 'absolute',
+          inset: 0,
+          display: 'flex',
+          alignItems: 'center',
+          justifyContent: 'center',
+          cursor: 'pointer',
+          borderRadius: d3roRadius.inner,
+          transition: 'background-color 0.15s ease',
+          '&:hover': {
+            bgcolor: d3roPalette.accent.amberDim,
+          },
+        }}
+      >
+        <Box
+          sx={{
+            display: 'flex',
+            alignItems: 'center',
+            gap: 0.5,
+            px: 1.5,
+            py: 0.5,
+            borderRadius: d3roRadius.small,
+            bgcolor: d3roPalette.bg.elevated,
+            border: `1px solid ${d3roPalette.border.default}`,
+          }}
+        >
+          <LockIcon sx={{ fontSize: 14, color: d3roPalette.accent.amber }} />
+          <Typography
+            sx={{
+              fontFamily: d3roFontMono,
+              fontSize: d3roTypo.small.size,
+              fontWeight: d3roTypo.small.weight,
+              letterSpacing: d3roTypo.small.spacing,
+              color: d3roPalette.accent.amber,
+            }}
+          >
+            {t('license.pro.required')}
+          </Typography>
+        </Box>
+      </Box>
+    </Box>
+  )
+}