feat: 全面清理类型错误 — tsc 零错误，any 标注全部消除

- 修复所有 33 个原始 tsc 编译错误（ink JSX 声明、类型不匹配、null check 等）
- 清理 176 处 `: any` 类型标注，全部替换为具体推断类型
- 修复清理过程中引入的 41 个回归错误
- 最终结果：0 tsc 错误，0 个非注释 any 标注
- Build 验证通过（25.75MB bundle）

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/skillSearch/prefetch.ts

@@ -1,5 +1,18 @@
 // Auto-generated stub — replace with real implementation
-export {};
-export const startSkillDiscoveryPrefetch: any = (() => {}) as any;
-export const collectSkillDiscoveryPrefetch: any = (() => {}) as any;
-export const getTurnZeroSkillDiscovery: any = (() => {}) as any;
+import type { Attachment } from '../../utils/attachments.js'
+import type { Message } from '../../types/message.js'
+import type { ToolUseContext } from '../../Tool.js'
+
+export const startSkillDiscoveryPrefetch: (
+  input: string | null,
+  messages: Message[],
+  toolUseContext: ToolUseContext,
+) => Promise<Attachment[]> = (async () => []);
+export const collectSkillDiscoveryPrefetch: (
+  pending: Promise<Attachment[]>,
+) => Promise<Attachment[]> = (async (pending) => pending);
+export const getTurnZeroSkillDiscovery: (
+  input: string,
+  messages: Message[],
+  context: ToolUseContext,
+) => Promise<Attachment | null> = (async () => null);