feat: 移除仓库内 nginx 并拆分前端运行时

frontend/src/api/axios.ts

@@ -7,9 +7,12 @@ import { useStudyStore } from "../store/study";
 import { TEXT } from "../locales";
 import { extendAccessToken, forceLogout, lockSession, markNetworkActive } from "../session/sessionManager";
 import { useSessionStore } from "../store/session";
+import { resolveApiBaseUrl } from "./baseUrl";
+
+const apiBaseUrl = resolveApiBaseUrl(import.meta.env.VITE_API_BASE_URL);
 
 const instance: AxiosInstance = axios.create({
-  baseURL: "/",
+  baseURL: apiBaseUrl,
   timeout: 15000,
 });
 

frontend/src/api/baseUrl.test.ts

@@ -0,0 +1,19 @@
+import { describe, expect, it } from "vitest";
+import { resolveApiBaseUrl } from "./baseUrl";
+
+describe("resolveApiBaseUrl", () => {
+  it("defaults to same-origin root when no env override is set", () => {
+    expect(resolveApiBaseUrl(undefined)).toBe("/");
+    expect(resolveApiBaseUrl("")).toBe("/");
+    expect(resolveApiBaseUrl("   ")).toBe("/");
+  });
+
+  it("preserves explicit root", () => {
+    expect(resolveApiBaseUrl("/")).toBe("/");
+  });
+
+  it("trims whitespace and trailing slashes from absolute base urls", () => {
+    expect(resolveApiBaseUrl(" http://localhost:8000/ ")).toBe("http://localhost:8000");
+    expect(resolveApiBaseUrl("https://api.example.com///")).toBe("https://api.example.com");
+  });
+});

frontend/src/api/baseUrl.ts

@@ -0,0 +1,12 @@
+const trimTrailingSlashes = (value: string): string => value.replace(/\/+$/, "");
+
+export const resolveApiBaseUrl = (rawValue: string | undefined): string => {
+  const normalized = rawValue?.trim() ?? "";
+  if (!normalized) {
+    return "/";
+  }
+  if (normalized === "/") {
+    return "/";
+  }
+  return trimTrailingSlashes(normalized);
+};