refactor(canvas): 替换自定义ID生成函数为nanoid并优化配置逻辑

- 移除自定义createId函数，统一使用nanoid库生成唯一标识符
- 将useEffectiveAiConfig Hook替换为resolveEffectiveConfig工具函数
- 直接从config store获取publicSettings避免额外的Hook依赖
- 更新所有组件中的ID生成调用以使用nanoid
- 简化buildApiUrl函数中的基础URL规范化逻辑

web/next.config.ts

@@ -4,7 +4,7 @@ import { loadEnvConfig } from "@next/env";
 import { readFileSync } from "node:fs";
 import { fileURLToPath } from "node:url";
 import { dirname, resolve } from "node:path";
-import { parseChangelog } from "./src/lib/release-info";
+import { parseChangelog } from "@/lib/release";
 
 const webDir = dirname(fileURLToPath(import.meta.url));
 const localVersion = readFileSync(resolve(webDir, "../VERSION"), "utf8").trim() || "dev";