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/skills/bundled/skillify.ts

@@ -5,10 +5,11 @@ import { registerBundledSkill } from '../bundledSkills.js'
 
 function extractUserMessages(messages: Message[]): string[] {
   return messages
-    .filter((m): m is Extract<typeof m, { type: 'user' }> => m.type === 'user')
+    .filter(m => m.type === 'user')
     .map(m => {
-      const content = m.message.content
+      const content = m.message?.content
       if (typeof content === 'string') return content
+      if (!Array.isArray(content)) return ''
       return content
         .filter(
           (b): b is Extract<typeof b, { type: 'text' }> => b.type === 'text',

src/skills/mcpSkills.ts

@@ -1,3 +1,7 @@
 // Auto-generated stub — replace with real implementation
 export {};
-export const fetchMcpSkillsForClient: any = (() => {}) as any;
+import type { Command } from 'src/types/command.js';
+export const fetchMcpSkillsForClient: ((...args: unknown[]) => Promise<Command[]>) & { cache: Map<string, unknown> } = Object.assign(
+  (..._args: unknown[]) => Promise.resolve([] as Command[]),
+  { cache: new Map<string, unknown>() }
+);