TG Bot 命令交互 + UI 圆角色差深度优化 + 通知配置修复

## TG Bot 交互命令系统 (新增)
- telegram_bot.go: 命令路由 + /start /help /status /search /downloads /stats
- telegram_webhook.go: Webhook 接收 + Polling 管理端点
- Polling 模式: 无需公网 HTTPS, 服务器启动自动轮询
- HTML parse_mode 统一消息格式

## 通知配置 BUG 修复
- validateChannel 添加 email 类型支持
- 前后端字段统一: channel_type -> type
- ListByType 新增仓库方法

## UI 深度优化
- glass-panel: 添加 rounded-2xl + 可见边框 + padding
- card: 添加 p-4 sm:p-6
- 全局 rounded-md -> rounded-xl, 裸 rounded -> rounded-lg
- 500+ 深色硬编码类名清零
- text-gray-400 -> gray-500 色差提升
- 按钮组 flex-wrap 防溢出
- data-table 表格溢出截断

web/src/pages/HomePage.tsx

@@ -82,7 +82,7 @@ export function HomePage() {
             <div className="h-10 w-10 rounded-full border-2 border-gray-100 border-t-gray-900 animate-spin" />
             <Film className="absolute h-4 w-4 text-brand-500" />
           </div>
-          <span className="text-sm font-semibold tracking-widest text-gray-400 uppercase">站点舱准备中…</span>
+          <span className="text-sm font-semibold tracking-widest text-gray-500 uppercase">站点舱准备中…</span>
         </motion.div>
       </div>
     )
@@ -92,7 +92,7 @@ export function HomePage() {
     return (
       <div className="flex flex-col items-center justify-center py-32 text-center max-w-md mx-auto">
         <div className="mb-6 flex h-24 w-24 items-center justify-center rounded-3xl bg-gray-100 border border-gray-200/50 shadow-sm">
-          <Film className="h-10 w-10 text-gray-400" />
+          <Film className="h-10 w-10 text-gray-500" />
         </div>
         <p className="text-xl font-bold text-gray-900">您的家庭影视站暂无内容</p>
         <p className="mt-2 text-sm text-gray-500 leading-relaxed">
@@ -142,7 +142,7 @@ export function HomePage() {
                 {featuredItem.overview}
               </p>
             ) : (
-              <p className="text-gray-400 text-sm italic">
+              <p className="text-gray-500 text-sm italic">
                 家庭私人媒体中心收藏。极高视听品质，支持多端原生无损解码及HLS转码播放。
               </p>
             )}
@@ -150,15 +150,15 @@ export function HomePage() {
             {/* Metadata Badges */}
             <div className="flex flex-wrap items-center gap-3 text-xs text-gray-500 font-bold">
               {featuredItem.year > 0 && (
-                <span className="bg-gray-100 px-2.5 py-1 rounded-md text-gray-900 border border-gray-200">{featuredItem.year} 年</span>
+                <span className="bg-gray-100 px-2.5 py-1 rounded-xl text-gray-900 border border-gray-200">{featuredItem.year} 年</span>
               )}
               {featuredItem.video_codec && (
-                <span className="rounded bg-brand-50 px-2 py-1 text-brand-700 border border-brand-100 uppercase font-bold text-[10px]">
+                <span className="rounded-lg bg-brand-50 px-2 py-1 text-brand-700 border border-brand-100 uppercase font-bold text-[10px]">
                   {featuredItem.video_codec}
                 </span>
               )}
               {featuredItem.container && (
-                <span className="rounded bg-gray-100 px-2 py-1 text-gray-700 border border-gray-200 uppercase font-mono text-[10px]">
+                <span className="rounded-lg bg-gray-100 px-2 py-1 text-gray-700 border border-gray-200 uppercase font-mono text-[10px]">
                   {featuredItem.container}
                 </span>
               )}
@@ -183,11 +183,11 @@ export function HomePage() {
       {history.length > 0 && (
         <section className="space-y-5">
           <div className="flex items-center gap-2.5">
-            <span className="p-1.5 rounded-lg bg-gray-100 border border-gray-200/50 text-gray-900">
+            <span className="p-1.5 rounded-xl bg-gray-100 border border-gray-200/50 text-gray-900">
               <Clock size={16} />
             </span>
             <h2 className="font-display text-xl font-extrabold tracking-tight text-gray-900">继续观看</h2>
-            <span className="text-xs font-bold text-gray-400 bg-gray-100 px-2.5 py-0.5 rounded-full border border-gray-200/40">{history.length} 个记录</span>
+            <span className="text-xs font-bold text-gray-500 bg-gray-100 px-2.5 py-0.5 rounded-full border border-gray-200/40">{history.length} 个记录</span>
           </div>
 
           <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 md:grid-cols-3 xl:grid-cols-4">
@@ -206,7 +206,7 @@ export function HomePage() {
           <section key={row.library.id} className="space-y-5">
             <div className="flex items-center justify-between border-b border-gray-200/80 pb-3">
               <div className="flex items-center gap-2.5">
-                <span className="p-1.5 rounded-lg bg-gray-100 text-gray-900 border border-gray-200/50">
+                <span className="p-1.5 rounded-xl bg-gray-100 text-gray-900 border border-gray-200/50">
                   {TYPE_ICONS[row.library.type] ?? <LibraryIcon size={18} />}
                 </span>
                 <h2 className="font-display text-xl font-extrabold tracking-tight text-gray-900">
@@ -240,7 +240,7 @@ export function HomePage() {
           <section className="space-y-5">
             <div className="flex items-center justify-between border-b border-gray-200/80 pb-3">
               <div className="flex items-center gap-2.5">
-                <span className="p-1.5 rounded-lg bg-gray-100 text-gray-900 border border-gray-200/50">
+                <span className="p-1.5 rounded-xl bg-gray-100 text-gray-900 border border-gray-200/50">
                   <Clock size={18} />
                 </span>
                 <h2 className="font-display text-xl font-extrabold tracking-tight text-gray-900">最近添加</h2>
@@ -272,7 +272,7 @@ function ContinueCard({ media, progress }: { media: Media; progress: number }) {
             referrerPolicy="no-referrer" 
           />
         ) : (
-          <div className="flex h-full items-center justify-center text-gray-400 bg-gray-50">
+          <div className="flex h-full items-center justify-center text-gray-500 bg-gray-50">
             <Film size={16} />
           </div>
         )}
@@ -293,7 +293,7 @@ function ContinueCard({ media, progress }: { media: Media; progress: number }) {
               className="h-full rounded-full bg-gradient-to-r from-brand-400 to-brand-500"
             />
           </div>
-          <p className="text-[10px] text-gray-400 font-bold tracking-wide uppercase">
+          <p className="text-[10px] text-gray-500 font-bold tracking-wide uppercase">
             已观看到 {Math.round(progress * 100)}%
           </p>
         </div>