fix: 修复 CI 构建失败（icon 类型改为可选，移除未使用变量）

Author: tt-a1i

src/pages/AuthenticationFlow.tsx

@@ -12,7 +12,7 @@ function CollapsibleSection({
  defaultOpen = false,
 }: {
  title: string;
- icon: string;
+ icon?: string;
  children: React.ReactNode;
  defaultOpen?: boolean;
 }) {

src/pages/EndToEndWalkthrough.tsx

@@ -20,7 +20,7 @@ function CollapsibleSection({
  highlight = false
 }: {
  title: string;
- icon: string;
+ icon?: string;
  children: React.ReactNode;
  defaultOpen?: boolean;
  highlight?: boolean;

src/pages/LearningPathGuide.tsx

@@ -11,7 +11,7 @@ import { getThemeColor } from '../utils/theme';
 interface LearningPath {
  id: string;
  title: string;
- icon: string;
+ icon?: string;
  description: string;
  duration: string;
  difficulty: 'beginner' | 'intermediate' | 'advanced';
@@ -100,18 +100,6 @@ function PathCard({
  isSelected: boolean;
  onSelect: () => void;
 }) {
- const difficultyColors = {
- beginner: 'var(--color-primary)',
- intermediate: 'var(--color-warning)',
- advanced: 'var(--color-primary)',
- };
-
- const difficultyLabels = {
- beginner: '入门',
- intermediate: '中级',
- advanced: '高级',
- };
-
  return (
  <button
  onClick={onSelect}

src/pages/LoopMechanism.tsx

@@ -117,7 +117,7 @@ function Introduction({
 
 // ===== Loop Node Component =====
 interface LoopNodeProps {
- icon: string;
+ icon?: string;
  title: string;
  description: string;
  variant?: 'default' | 'success' | 'warning';

src/pages/MemoryManagement.tsx

@@ -16,7 +16,7 @@ function CollapsibleSection({
  defaultOpen = false,
 }: {
  title: string;
- icon: string;
+ icon?: string;
  children: React.ReactNode;
  defaultOpen?: boolean;
 }) {

src/pages/SessionPersistence.tsx

@@ -15,7 +15,7 @@ function CollapsibleSection({
  highlight = false
 }: {
  title: string;
- icon: string;
+ icon?: string;
  children: React.ReactNode;
  defaultOpen?: boolean;
  highlight?: boolean;

src/pages/ToolDetails.tsx

@@ -10,7 +10,7 @@ import { getThemeColor } from '../utils/theme';
 
 
 interface ToolCardProps {
- icon: string;
+ icon?: string;
  name: string;
  tools: string[];
  status: string;

src/pages/ToolDeveloperGuide.tsx

@@ -14,7 +14,7 @@ function CollapsibleSection({
  highlight = false
 }: {
  title: string;
- icon: string;
+ icon?: string;
  children: React.ReactNode;
  defaultOpen?: boolean;
  highlight?: boolean;