fix(api-gateway): 修复尾斜杠重定向循环与 DEV_MODE 旁路

- main.go: 禁用 RedirectTrailingSlash，为 classes/iam/teacher 双注册无尾斜杠与通配符路由

- auth.go: DEV_MODE=true 时接受 Bearer dev-token 注入开发用户

- config.go: 新增 DevMode 配置项与 getEnvBool 工具

- page.tsx: 开发模式请求携带 Authorization: Bearer dev-token

- .env.example: 添加 DEV_MODE=false 默认值与生产警告

apps/teacher-portal/src/app/page.tsx

@@ -1,6 +1,6 @@
-'use client';
+"use client";
 
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useEffect, useCallback } from "react";
 
 interface ClassItem {
   id: string;
@@ -20,24 +20,28 @@ interface ApiResponse<T> {
 export default function HomePage() {
   const [classes, setClasses] = useState<ClassItem[]>([]);
   const [loading, setLoading] = useState(false);
-  const [name, setName] = useState('');
-  const [gradeId, setGradeId] = useState('550e8400-e29b-41d4-a716-446655440000');
-  const [description, setDescription] = useState('');
+  const [name, setName] = useState("");
+  const [gradeId, setGradeId] = useState(
+    "550e8400-e29b-41d4-a716-446655440000",
+  );
+  const [description, setDescription] = useState("");
   const [error, setError] = useState<string | null>(null);
 
   const fetchClasses = useCallback(async () => {
     setLoading(true);
     setError(null);
     try {
-      const res = await fetch('/api/v1/classes');
+      const res = await fetch("/api/v1/classes", {
+        headers: { Authorization: "Bearer dev-token" },
+      });
       const json: ApiResponse<ClassItem[]> = await res.json();
       if (json.success && json.data) {
         setClasses(json.data);
       } else {
-        setError(json.error?.message || 'Failed to load');
+        setError(json.error?.message || "Failed to load");
       }
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Network error');
+      setError(e instanceof Error ? e.message : "Network error");
     } finally {
       setLoading(false);
     }
@@ -51,49 +55,61 @@ export default function HomePage() {
     e.preventDefault();
     if (!name.trim()) return;
     try {
-      const res = await fetch('/api/v1/classes', {
-        method: 'POST',
-        headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer dev-token' },
+      const res = await fetch("/api/v1/classes", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          Authorization: "Bearer dev-token",
+        },
         body: JSON.stringify({ name, gradeId, description }),
       });
       const json = await res.json();
       if (!json.success) {
-        setError(json.error?.message || 'Create failed');
+        setError(json.error?.message || "Create failed");
         return;
       }
-      setName('');
-      setDescription('');
+      setName("");
+      setDescription("");
       await fetchClasses();
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Network error');
+      setError(e instanceof Error ? e.message : "Network error");
     }
   };
 
   const handleDelete = async (id: string) => {
     try {
       const res = await fetch(`/api/v1/classes/${id}`, {
-        method: 'DELETE',
-        headers: { 'Authorization': 'Bearer dev-token' },
+        method: "DELETE",
+        headers: { Authorization: "Bearer dev-token" },
       });
       const json = await res.json();
       if (!json.success) {
-        setError(json.error?.message || 'Delete failed');
+        setError(json.error?.message || "Delete failed");
         return;
       }
       await fetchClasses();
     } catch (e) {
-      setError(e instanceof Error ? e.message : 'Network error');
+      setError(e instanceof Error ? e.message : "Network error");
     }
   };
 
   return (
-    <div className="min-h-screen" style={{ background: 'var(--bg-paper)' }}>
-      <header className="border-b" style={{ borderColor: 'var(--color-rule)' }}>
+    <div className="min-h-screen" style={{ background: "var(--bg-paper)" }}>
+      <header className="border-b" style={{ borderColor: "var(--color-rule)" }}>
         <div className="max-w-6xl mx-auto px-8 py-6">
-          <h1 className="text-3xl" style={{ fontFamily: 'var(--font-serif)', color: 'var(--color-ink)' }}>
+          <h1
+            className="text-3xl"
+            style={{
+              fontFamily: "var(--font-serif)",
+              color: "var(--color-ink)",
+            }}
+          >
             班级管理
           </h1>
-          <p className="mt-1 text-sm" style={{ color: 'var(--color-ink-muted)' }}>
+          <p
+            className="mt-1 text-sm"
+            style={{ color: "var(--color-ink-muted)" }}
+          >
             P1 黄金模板验证 - classes 域 CRUD
           </p>
         </div>
@@ -102,11 +118,19 @@ export default function HomePage() {
       <main className="max-w-6xl mx-auto px-8 py-8 grid grid-cols-12 gap-8">
         {/* 左侧：创建表单 */}
         <aside className="col-span-4">
-          <h2 className="text-xl mb-4" style={{ fontFamily: 'var(--font-serif)' }}>新建班级</h2>
+          <h2
+            className="text-xl mb-4"
+            style={{ fontFamily: "var(--font-serif)" }}
+          >
+            新建班级
+          </h2>
           <div className="rule-thin mb-4" />
           <form onSubmit={handleCreate} className="space-y-4">
             <div>
-              <label className="block text-xs uppercase tracking-wide mb-1" style={{ color: 'var(--color-ink-muted)' }}>
+              <label
+                className="block text-xs uppercase tracking-wide mb-1"
+                style={{ color: "var(--color-ink-muted)" }}
+              >
                 班级名称
               </label>
               <input
@@ -114,13 +138,19 @@ export default function HomePage() {
                 value={name}
                 onChange={(e) => setName(e.target.value)}
                 className="w-full px-3 py-2 bg-transparent border-b focus:outline-none focus:border-b-2"
-                style={{ borderColor: 'var(--color-rule)', borderRadius: '6px 6px 0 0' }}
+                style={{
+                  borderColor: "var(--color-rule)",
+                  borderRadius: "6px 6px 0 0",
+                }}
                 placeholder="如：高三(1)班"
                 required
               />
             </div>
             <div>
-              <label className="block text-xs uppercase tracking-wide mb-1" style={{ color: 'var(--color-ink-muted)' }}>
+              <label
+                className="block text-xs uppercase tracking-wide mb-1"
+                style={{ color: "var(--color-ink-muted)" }}
+              >
                 年级 ID
               </label>
               <input
@@ -128,25 +158,34 @@ export default function HomePage() {
                 value={gradeId}
                 onChange={(e) => setGradeId(e.target.value)}
                 className="w-full px-3 py-2 bg-transparent border-b text-sm font-mono"
-                style={{ borderColor: 'var(--color-rule)', borderRadius: '6px 6px 0 0' }}
+                style={{
+                  borderColor: "var(--color-rule)",
+                  borderRadius: "6px 6px 0 0",
+                }}
               />
             </div>
             <div>
-              <label className="block text-xs uppercase tracking-wide mb-1" style={{ color: 'var(--color-ink-muted)' }}>
+              <label
+                className="block text-xs uppercase tracking-wide mb-1"
+                style={{ color: "var(--color-ink-muted)" }}
+              >
                 描述（可选）
               </label>
               <textarea
                 value={description}
                 onChange={(e) => setDescription(e.target.value)}
                 className="w-full px-3 py-2 bg-transparent border-b resize-none"
-                style={{ borderColor: 'var(--color-rule)', borderRadius: '6px 6px 0 0' }}
+                style={{
+                  borderColor: "var(--color-rule)",
+                  borderRadius: "6px 6px 0 0",
+                }}
                 rows={3}
               />
             </div>
             <button
               type="submit"
               className="px-4 py-2 text-white text-sm tracking-wide transition-opacity hover:opacity-90"
-              style={{ background: 'var(--color-accent)', borderRadius: '6px' }}
+              style={{ background: "var(--color-accent)", borderRadius: "6px" }}
             >
               创建班级
             </button>
@@ -156,16 +195,19 @@ export default function HomePage() {
         {/* 中间：班级列表（纸面）*/}
         <section className="col-span-8">
           <div className="flex items-baseline justify-between mb-4">
-            <h2 className="text-xl" style={{ fontFamily: 'var(--font-serif)' }}>
+            <h2 className="text-xl" style={{ fontFamily: "var(--font-serif)" }}>
               班级列表
-              <span className="ml-2 text-sm font-sans" style={{ color: 'var(--color-ink-muted)' }}>
+              <span
+                className="ml-2 text-sm font-sans"
+                style={{ color: "var(--color-ink-muted)" }}
+              >
                 {classes.length} 个
               </span>
             </h2>
             <button
               onClick={fetchClasses}
               className="text-xs uppercase tracking-wide hover:opacity-70"
-              style={{ color: 'var(--color-accent)' }}
+              style={{ color: "var(--color-accent)" }}
             >
               刷新
             </button>
@@ -173,37 +215,65 @@ export default function HomePage() {
           <div className="rule-thin mb-6" />
 
           {error && (
-            <div className="mark-left mb-4 py-2" style={{ borderColor: 'var(--color-accent)' }}>
-              <p className="text-sm" style={{ color: 'var(--color-accent)' }}>{error}</p>
+            <div
+              className="mark-left mb-4 py-2"
+              style={{ borderColor: "var(--color-accent)" }}
+            >
+              <p className="text-sm" style={{ color: "var(--color-accent)" }}>
+                {error}
+              </p>
             </div>
           )}
 
           {loading ? (
-            <p className="text-sm" style={{ color: 'var(--color-ink-muted)' }}>加载中...</p>
+            <p className="text-sm" style={{ color: "var(--color-ink-muted)" }}>
+              加载中...
+            </p>
           ) : classes.length === 0 ? (
-            <p className="text-sm italic" style={{ color: 'var(--color-ink-muted)' }}>
+            <p
+              className="text-sm italic"
+              style={{ color: "var(--color-ink-muted)" }}
+            >
               暂无班级，从左侧创建第一个
             </p>
           ) : (
             <ul className="space-y-0">
               {classes.map((cls) => (
-                <li key={cls.id} className="py-4 grid grid-cols-12 gap-4 items-baseline" style={{ borderBottom: '1px solid var(--color-rule)' }}>
+                <li
+                  key={cls.id}
+                  className="py-4 grid grid-cols-12 gap-4 items-baseline"
+                  style={{ borderBottom: "1px solid var(--color-rule)" }}
+                >
                   <div className="col-span-7">
-                    <h3 className="text-lg" style={{ fontFamily: 'var(--font-serif)', color: 'var(--color-ink)' }}>
+                    <h3
+                      className="text-lg"
+                      style={{
+                        fontFamily: "var(--font-serif)",
+                        color: "var(--color-ink)",
+                      }}
+                    >
                       {cls.name}
                     </h3>
                     {cls.description && (
-                      <p className="mt-1 text-sm" style={{ color: 'var(--color-ink-muted)' }}>{cls.description}</p>
+                      <p
+                        className="mt-1 text-sm"
+                        style={{ color: "var(--color-ink-muted)" }}
+                      >
+                        {cls.description}
+                      </p>
                     )}
                   </div>
-                  <div className="col-span-3 text-xs font-mono" style={{ color: 'var(--color-ink-muted)' }}>
+                  <div
+                    className="col-span-3 text-xs font-mono"
+                    style={{ color: "var(--color-ink-muted)" }}
+                  >
                     {cls.id.slice(0, 8)}...
                   </div>
                   <div className="col-span-2 text-right">
                     <button
                       onClick={() => handleDelete(cls.id)}
                       className="text-xs uppercase tracking-wide hover:opacity-70"
-                      style={{ color: 'var(--color-ink-muted)' }}
+                      style={{ color: "var(--color-ink-muted)" }}
                     >
                       删除
                     </button>