feat: add adapter documentation link button

Add 'View Docs' button that links to the corresponding adapter's
documentation page via link.langbot.app short links.

Appears in:
- Wizard adapter selection cards (Step 0)
- Wizard bot config card header (Step 1)
- Bot create/edit form (adapter config section)

Supports all 7 languages (en/zh-Hans/zh-Hant/ja/th/vi/es).
Doc links auto-resolve to the correct language based on UI locale.

web/src/app/infra/entities/adapter-docs.ts

@@ -0,0 +1,43 @@
+/**
+ * Returns the documentation URL for a given adapter name,
+ * using link.langbot.app short links.
+ */
+export function getAdapterDocUrl(
+  adapterName: string,
+  locale: string,
+): string | null {
+  // Map locale to doc language prefix
+  let lang: string;
+  if (locale.startsWith('zh')) {
+    lang = 'zh';
+  } else if (locale.startsWith('ja')) {
+    lang = 'ja';
+  } else {
+    lang = 'en';
+  }
+
+  // Only adapters with dedicated doc pages
+  const ADAPTER_DOC_SLUGS: Record<string, string> = {
+    telegram: 'telegram',
+    discord: 'discord',
+    slack: 'slack',
+    line: 'line',
+    kook: 'kook',
+    lark: 'lark',
+    dingtalk: 'dingtalk',
+    aiocqhttp: 'aiocqhttp',
+    qqofficial: 'qqofficial',
+    wecom: 'wecom',
+    wecomcs: 'wecomcs',
+    wecombot: 'wecombot',
+    officialaccount: 'officialaccount',
+    wechatpad: 'wechatpad',
+    openclaw_weixin: 'openclaw_weixin',
+    satori: 'satori',
+  };
+
+  const slug = ADAPTER_DOC_SLUGS[adapterName];
+  if (!slug) return null;
+
+  return `https://link.langbot.app/${lang}/platforms/${slug}`;
+}