feat(docs): refresh landing hero to current brand and complete quick-start grid (#102880)

The docs landing page and README still led with the retired cartoon
crawfish wordmark while the rest of the site uses the round mascot brand.
Swap in generated hero banners (dark/light), add the missing fourth
quick-start card (Connect a Channel), align the Mintlify backup palette
with the site coral tokens, and drop the old logo assets.

README.md

@@ -2,8 +2,8 @@
 
 <p align="center">
     <picture>
-        <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/openclaw/openclaw/main/docs/assets/openclaw-logo-text-dark.svg">
-        <img src="https://raw.githubusercontent.com/openclaw/openclaw/main/docs/assets/openclaw-logo-text.svg" alt="OpenClaw" width="500">
+        <source media="(prefers-color-scheme: light)" srcset="https://raw.githubusercontent.com/openclaw/openclaw/main/docs/assets/openclaw-hero-light.png">
+        <img src="https://raw.githubusercontent.com/openclaw/openclaw/main/docs/assets/openclaw-hero-dark.png" alt="OpenClaw" width="500">
     </picture>
 </p>
 

docs/docs.json

@@ -20,9 +20,9 @@
   },
   "favicon": "/assets/pixel-lobster.svg",
   "colors": {
-    "primary": "#FF5A36",
-    "dark": "#FF5A36",
-    "light": "#FF8A6B"
+    "primary": "#D84A31",
+    "dark": "#E05540",
+    "light": "#F5654A"
   },
   "styling": {
     "codeblocks": {

docs/index.md

@@ -9,13 +9,13 @@ title: "OpenClaw"
 
 <p align="center">
     <img
-        src="/assets/openclaw-logo-text-dark.png"
+        src="/assets/openclaw-hero-light.png"
         alt="OpenClaw"
         width="500"
         class="dark:hidden"
     />
     <img
-        src="/assets/openclaw-logo-text.png"
+        src="/assets/openclaw-hero-dark.png"
         alt="OpenClaw"
         width="500"
         class="hidden dark:block"
@@ -36,6 +36,9 @@ title: "OpenClaw"
   <Card title="Run Onboarding" href="/start/wizard" icon="sparkles">
     Guided setup with `openclaw onboard` and pairing flows.
   </Card>
+  <Card title="Connect a Channel" href="/channels" icon="message-circle">
+    Link Discord, Signal, Telegram, WhatsApp, and more to chat from anywhere.
+  </Card>
   <Card title="Open the Control UI" href="/web/control-ui" icon="layout-dashboard">
     Launch the browser dashboard for chat, config, and sessions.
   </Card>