refactor(feedback): replace generic description with brand-colored GitHub CTA

The Feedback modal previously rendered three lines of grey copy before the
editor — title, description, and the GitHub hint from #2451. The hint blended
into the description, defeating its purpose of nudging users toward a tracked
channel.

Drop the generic description (placeholder already explains what to type) and
restyle the hint so GitHub itself is the only brand-coloured anchor. The
shorter sentence ("Want faster traction? Head to GitHub") puts the link at
the natural end-of-line fixation point, where the colour shift actually
registers.

i18n splits into prefix + link (suffix would be empty), avoiding the
sentence-order brittleness that 3-key splits usually introduce.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>

packages/views/locales/en/modals.json

@@ -22,7 +22,6 @@
   },
   "feedback": {
     "title": "Feedback",
-    "description": "We'd love to hear what's working, what isn't, or what you'd like to see next.",
     "placeholder": "Tell us about your experience, bugs you've found, or features you'd like to see…",
     "toast_uploading": "Please wait for uploads to finish…",
     "toast_too_long": "Message is too long",
@@ -30,7 +29,8 @@
     "toast_failed": "Failed to send feedback",
     "send": "Send feedback",
     "sending": "Sending…",
-    "github_hint": "Want to discuss or get faster traction? Open an issue on GitHub →"
+    "github_hint_prefix": "Want faster traction? Head to ",
+    "github_hint_link": "GitHub"
   },
   "issue_picker": {
     "search_placeholder": "Search issues...",

packages/views/locales/zh-Hans/modals.json

@@ -22,7 +22,6 @@
   },
   "feedback": {
     "title": "反馈",
-    "description": "告诉我们哪些好用、哪些不好用、希望接下来做什么。",
     "placeholder": "聊聊你的体验、遇到的 bug，或想看到的功能...",
     "toast_uploading": "请等待上传完成...",
     "toast_too_long": "内容过长",
@@ -30,7 +29,8 @@
     "toast_failed": "发送反馈失败",
     "send": "发送反馈",
     "sending": "发送中...",
-    "github_hint": "想要讨论或更快的处理？来 GitHub 提 issue →"
+    "github_hint_prefix": "想要更快的，请去 ",
+    "github_hint_link": "GitHub"
   },
   "issue_picker": {
     "search_placeholder": "搜索 issue...",

packages/views/modals/feedback.tsx

@@ -5,7 +5,6 @@ import { toast } from "sonner";
 import {
   Dialog,
   DialogContent,
-  DialogDescription,
   DialogHeader,
   DialogTitle,
 } from "@multica/ui/components/ui/dialog";
@@ -93,17 +92,17 @@ export function FeedbackModal({ onClose }: { onClose: () => void }) {
       <DialogContent className="sm:max-w-2xl !h-[28rem] p-0 gap-0 flex flex-col overflow-hidden">
         <DialogHeader className="px-5 pt-4 pb-2 shrink-0">
           <DialogTitle>{t(($) => $.feedback.title)}</DialogTitle>
-          <DialogDescription>
-            {t(($) => $.feedback.description)}
-          </DialogDescription>
-          <a
-            href="https://github.com/multica-ai/multica/issues"
-            target="_blank"
-            rel="noopener noreferrer"
-            className="mt-1 text-xs text-muted-foreground underline-offset-2 hover:text-foreground hover:underline"
-          >
-            {t(($) => $.feedback.github_hint)}
-          </a>
+          <p className="mt-1 text-xs text-muted-foreground">
+            {t(($) => $.feedback.github_hint_prefix)}
+            <a
+              href="https://github.com/multica-ai/multica/issues"
+              target="_blank"
+              rel="noopener noreferrer"
+              className="text-brand underline decoration-brand/40 underline-offset-2 hover:decoration-brand"
+            >
+              {t(($) => $.feedback.github_hint_link)}
+            </a>
+          </p>
         </DialogHeader>
 
         <div className="flex-1 min-h-0 px-5 pb-3">