feat(manager-web): drop third-party model brand grid from landing

Per docs §10 "禁止普通用户体验出现：模型供应商配置 / 模型提供方
选择" — the dashboard landing hero showed "OpenAI / Claude /
Gemini / DeepSeek / Qwen / Llama" as a marketing matrix, which
leaks upstream provider branding into the user-facing surface.

Replaced with Heicode capability tags (通用 / 长上下文 / 推理 /
代码 / 多模态 / 高性价比). This is the landing the user lands on
after login; admins still see real upstream provider names in
the system-settings → models tabs (those are technically the
channel protocol names and removing them would mislead admins).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

heicode/web/default/src/features/home/components/sections/features.tsx

@@ -24,17 +24,24 @@ export function Features(_props: FeaturesProps) {
       span: 'md:col-span-2',
       icon: <Zap className='size-4 text-blue-400' />,
       visual: (
+        // Per docs §10 "禁止普通用户体验出现：模型供应商配置 / 模型提供方选择" —
+        // the landing page shows Heicode capability roles, not upstream provider brand names.
         <div className='mt-4 grid grid-cols-3 gap-2'>
-          {['OpenAI', 'Claude', 'Gemini', 'DeepSeek', 'Qwen', 'Llama'].map(
-            (name) => (
+          {[
+            'Heicode · 通用',
+            'Heicode · 长上下文',
+            'Heicode · 推理',
+            'Heicode · 代码',
+            'Heicode · 多模态',
+            'Heicode · 高性价比',
+          ].map((name) => (
             <div
               key={name}
               className='border-border/30 bg-muted/20 text-muted-foreground flex items-center justify-center rounded-lg border px-3 py-2 text-xs transition-colors duration-300 hover:border-blue-500/30 hover:bg-blue-500/5'
             >
               {name}
             </div>
-            )
-          )}
+          ))}
         </div>
       ),
     },