feat: align devDeps to 0.2.0-rc.2 (21 packages)

- Bump 21 @deepseek-ai devDeps from 0.1.5-rc.2 → 0.2.0-rc.2
  (dsh-code-runtime stays at 0.1.5-rc.2 — no 0.2.0-rc.2 published)
- Fix sidechat-routes.ts: source.kind 'plugin' → 'user'
  (0.2.0-rc.2 removed 'plugin' from MessageSourceMap)
- Remove unused SIDE_INJECTION_PLUGIN import
- Fix test fixtures for 0.2.0-rc.2 stricter validation:
  - tool/result message role: 'user' → 'tool'
  - add toolCallId at message top level
  - assertion kind: 'plugin' → 'user'
- Icon migration: Icon*14 → Icon*Regular, Icon*16 → Icon*Medium (19 files)
- SideChatView API migration to 0.2.0-rc.2
- Add 4 new locale keys (sideChatBlockNoExitCode, codeLabel, wrapLabel, unwrapLabel)
- intercept.tsx: guard against undefined matched in SidebarProducedFiles

Verification:
- pnpm run typecheck: PASS
- pnpm run build: PASS
- npx vitest run: 1015 passed | 0 failed | 9 skipped

src/client/TreePanel.tsx

@@ -17,7 +17,7 @@
  */
 import { useEffect, useRef, useState, type InputHTMLAttributes } from 'react'
 import clsx from 'clsx'
-import { IconFolderOpen16, IconRefreshOutline16 } from '@deepseek-ai/dsh-client-ui-primitives'
+import { IconFolderOpenMedium, IconRefreshOutlineMedium } from '@deepseek-ai/dsh-client-ui-primitives'
 import { api } from './api.ts'
 import type { BetterSidebarService } from './service.ts'
 import type { SidebarStore } from './state.ts'
@@ -195,7 +195,7 @@ export function TreePanel(props: {
           title={t('refresh')}
           onClick={() => { setRefreshTick(tick => tick + 1) }}
         >
-          <IconRefreshOutline16 size={14} />
+          <IconRefreshOutlineMedium size={14} />
         </button>
         <button
           type="button"
@@ -215,7 +215,7 @@ export function TreePanel(props: {
           disabled={busy}
           onClick={() => { folderInputRef.current?.click() }}
         >
-          <IconFolderOpen16 size={14} />
+          <IconFolderOpenMedium size={14} />
         </button>
         <input
           ref={fileInputRef}