Improve links/buttons for AI errors (#1524)

drive-by: update links for pro banners

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Revamps ChatErrorBox with styled CTA buttons, UTM-tracked links,
broader error matching, and adds default help CTAs; updates Pro banners
to point to /pro URLs.
> 
> - **Chat**:
> - **Error handling/UI**: Expands rate-limit matching to include
`"Provider returned error"` and appends default CTAs on generic errors.
> - **CTAs**: Replaces underlined links with styled buttons via
`ExternalLink` (supports `primary|secondary` variants and icons), and
adds upgrade/docs buttons across error states.
> - **Links**: Adds UTM parameters to Pro/Docs links; updates exceeded
budget CTA to `"Reload or upgrade your subscription"` with new
subscription URL.
> - **Pro Banners**:
> - Adjusts banner click-through URLs in `AiAccessBanner`,
`SmartContextBanner`, and `TurboBanner` to `https://www.dyad.sh/pro?...`
(removes `#ai`).
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
2111954ac9a98dd66f5b3b9e628270ac19713a2d. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

src/components/chat/ChatErrorBox.tsx

@@ -1,5 +1,9 @@
 import { IpcClient } from "@/ipc/ipc_client";
-import { X } from "lucide-react";
+import {
+  X,
+  ExternalLink as ExternalLinkIcon,
+  CircleArrowUp,
+} from "lucide-react";
 import ReactMarkdown from "react-markdown";
 import remarkGfm from "remark-gfm";
 
@@ -17,7 +21,10 @@ export function ChatErrorBox({
       <ChatErrorContainer onDismiss={onDismiss}>
         {error}
         <span className="ml-1">
-          <ExternalLink href="https://dyad.sh/pro">
+          <ExternalLink
+            href="https://dyad.sh/pro?utm_source=dyad-app&utm_medium=app&utm_campaign=free-quota-error"
+            variant="primary"
+          >
             Access with Dyad Pro
           </ExternalLink>
         </span>{" "}
@@ -30,22 +37,24 @@ export function ChatErrorBox({
   // because it also includes this URL in the error message
   if (
     error.includes("Resource has been exhausted") ||
-    error.includes("https://ai.google.dev/gemini-api/docs/rate-limits")
+    error.includes("https://ai.google.dev/gemini-api/docs/rate-limits") ||
+    error.includes("Provider returned error")
   ) {
     return (
       <ChatErrorContainer onDismiss={onDismiss}>
         {error}
-        <span className="ml-1">
-          <ExternalLink href="https://dyad.sh/pro">
+        <div className="mt-2 space-y-2 space-x-2">
+          <ExternalLink
+            href="https://dyad.sh/pro?utm_source=dyad-app&utm_medium=app&utm_campaign=rate-limit-error"
+            variant="primary"
+          >
             Upgrade to Dyad Pro
           </ExternalLink>
-        </span>{" "}
-        or read the
-        <span className="ml-1">
+
           <ExternalLink href="https://dyad.sh/docs/help/ai-rate-limit">
-            Rate limit troubleshooting guide.
+            Troubleshooting guide
           </ExternalLink>
-        </span>
+        </div>
       </ChatErrorContainer>
     );
   }
@@ -55,7 +64,10 @@ export function ChatErrorBox({
       <ChatInfoContainer onDismiss={onDismiss}>
         <span>
           Looks like you don't have a valid Dyad Pro key.{" "}
-          <ExternalLink href="https://dyad.sh/pro">
+          <ExternalLink
+            href="https://dyad.sh/pro?utm_source=dyad-app&utm_medium=app&utm_campaign=invalid-pro-key-error"
+            variant="primary"
+          >
             Upgrade to Dyad Pro
           </ExternalLink>{" "}
           today.
@@ -68,8 +80,11 @@ export function ChatErrorBox({
       <ChatInfoContainer onDismiss={onDismiss}>
         <span>
           You have used all of your Dyad AI credits this month.{" "}
-          <ExternalLink href="https://academy.dyad.sh/subscription">
-            Upgrade to Dyad Max
+          <ExternalLink
+            href="https://academy.dyad.sh/subscription?utm_source=dyad-app&utm_medium=app&utm_campaign=exceeded-budget-error"
+            variant="primary"
+          >
+            Reload or upgrade your subscription
           </ExternalLink>{" "}
           and get more AI credits
         </span>
@@ -80,22 +95,59 @@ export function ChatErrorBox({
   if (error.includes("Fallbacks=")) {
     error = error.split("Fallbacks=")[0];
   }
-  return <ChatErrorContainer onDismiss={onDismiss}>{error}</ChatErrorContainer>;
+  return (
+    <ChatErrorContainer onDismiss={onDismiss}>
+      {error}
+      <div className="mt-2 space-y-2 space-x-2">
+        <ExternalLink
+          href="https://dyad.sh/pro?utm_source=dyad-app&utm_medium=app&utm_campaign=general-error"
+          variant="primary"
+        >
+          Upgrade to Dyad Pro
+        </ExternalLink>
+
+        <ExternalLink href="https://www.dyad.sh/docs/faq">
+          Read docs
+        </ExternalLink>
+      </div>
+    </ChatErrorContainer>
+  );
 }
 
 function ExternalLink({
   href,
   children,
+  variant = "secondary",
+  icon,
 }: {
   href: string;
   children: React.ReactNode;
+  variant?: "primary" | "secondary";
+  icon?: React.ReactNode;
 }) {
+  const baseClasses =
+    "cursor-pointer inline-flex items-center gap-1.5 rounded-md px-3 py-1.5 text-sm font-medium shadow-sm focus:outline-none focus:ring-2";
+  const primaryClasses =
+    "bg-blue-600 text-white hover:bg-blue-700 focus:ring-blue-500";
+  const secondaryClasses =
+    "bg-blue-50 text-blue-700 border border-blue-200 hover:bg-blue-100 hover:border-blue-300 focus:ring-blue-200";
+  const iconElement =
+    icon ??
+    (variant === "primary" ? (
+      <CircleArrowUp size={18} />
+    ) : (
+      <ExternalLinkIcon size={14} />
+    ));
+
   return (
     <a
-      className="underline cursor-pointer text-blue-500 hover:text-blue-700"
+      className={`${baseClasses} ${
+        variant === "primary" ? primaryClasses : secondaryClasses
+      }`}
       onClick={() => IpcClient.getInstance().openExternalUrl(href)}
     >
-      {children}
+      <span>{children}</span>
+      {iconElement}
     </a>
   );
 }