feat(icon): add icon type system and intelligent inference logic

Introduce a new icon system for provider customization:

- Add IconMetadata and IconPreset interfaces in src/types/icon.ts
  - Define structure for icon name, display name, category, keywords
  - Support default color configuration per icon

- Implement smart icon inference in src/config/iconInference.ts
  - Create iconMappings for 25+ AI providers and cloud platforms
  - Include Claude, DeepSeek, Qwen, Kimi, Google, AWS, Azure, etc.
  - inferIconForPreset(): match provider name to icon config
  - addIconsToPresets(): batch apply icons to preset arrays
  - Support fuzzy matching for flexible name recognition

This foundation enables automatic icon assignment when users add
providers, improving visual identification in the provider list.

src/config/iconInference.ts

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+/**
+ * 根据供应商名称智能推断图标配置
+ */
+
+const iconMappings = {
+  // AI 服务商
+  claude: { icon: "claude", iconColor: "#D4915D" },
+  anthropic: { icon: "anthropic", iconColor: "#D4915D" },
+  deepseek: { icon: "deepseek", iconColor: "#1E88E5" },
+  zhipu: { icon: "zhipu", iconColor: "#0F62FE" },
+  glm: { icon: "zhipu", iconColor: "#0F62FE" },
+  qwen: { icon: "qwen", iconColor: "#FF6A00" },
+  alibaba: { icon: "alibaba", iconColor: "#FF6A00" },
+  aliyun: { icon: "alibaba", iconColor: "#FF6A00" },
+  kimi: { icon: "kimi", iconColor: "#6366F1" },
+  moonshot: { icon: "moonshot", iconColor: "#6366F1" },
+  baidu: { icon: "baidu", iconColor: "#2932E1" },
+  tencent: { icon: "tencent", iconColor: "#00A4FF" },
+  hunyuan: { icon: "hunyuan", iconColor: "#00A4FF" },
+  minimax: { icon: "minimax", iconColor: "#FF6B6B" },
+  google: { icon: "google", iconColor: "#4285F4" },
+  meta: { icon: "meta", iconColor: "#0081FB" },
+  mistral: { icon: "mistral", iconColor: "#FF7000" },
+  cohere: { icon: "cohere", iconColor: "#39594D" },
+  perplexity: { icon: "perplexity", iconColor: "#20808D" },
+  huggingface: { icon: "huggingface", iconColor: "#FFD21E" },
+
+  // 云平台
+  aws: { icon: "aws", iconColor: "#FF9900" },
+  azure: { icon: "azure", iconColor: "#0078D4" },
+  huawei: { icon: "huawei", iconColor: "#FF0000" },
+  cloudflare: { icon: "cloudflare", iconColor: "#F38020" },
+};
+
+/**
+ * 根据预设名称推断图标
+ */
+export function inferIconForPreset(presetName: string): {
+  icon?: string;
+  iconColor?: string;
+} {
+  const nameLower = presetName.toLowerCase();
+
+  // 精确匹配或模糊匹配
+  for (const [key, config] of Object.entries(iconMappings)) {
+    if (nameLower.includes(key)) {
+      return config;
+    }
+  }
+
+  return {};
+}
+
+/**
+ * 批量为预设添加图标配置
+ */
+export function addIconsToPresets<
+  T extends { name: string; icon?: string; iconColor?: string },
+>(presets: T[]): T[] {
+  return presets.map((preset) => {
+    // 如果已经配置了图标，则保留原配置
+    if (preset.icon) {
+      return preset;
+    }
+
+    // 否则根据名称推断
+    const inferred = inferIconForPreset(preset.name);
+    return {
+      ...preset,
+      ...inferred,
+    };
+  });
+}

src/types/icon.ts

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+export interface IconMetadata {
+  name: string; // 图标名称（小写，如 "openai"）
+  displayName: string; // 显示名称（如 "OpenAI"）
+  category: string; // 分类（如 "ai-provider", "cloud", "tool"）
+  keywords: string[]; // 搜索关键词
+  defaultColor?: string; // 默认颜色
+}
+
+export interface IconPreset {
+  [key: string]: IconMetadata;
+}