Improve dashboard responsive layouts (#805)

* Improve dashboard responsive layouts

* Improve proxy pools mobile layout

* Improve CLI tool card input responsiveness

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Co-authored-by: Delynn Assistant <zhen@dkzhen.org>

src/app/(dashboard)/dashboard/mitm/MitmPageClient.js

@@ -75,7 +75,11 @@ export default function MitmPageClient() {
   const mitmTools = Object.entries(MITM_TOOLS);
 
   return (
-    <div className="flex flex-col gap-6">
+    <div className="mx-auto flex w-full max-w-5xl flex-col gap-6 px-1 sm:px-0">
+      <div className="flex flex-col gap-1">
+        <h1 className="text-xl font-semibold text-text-main sm:text-2xl">MITM</h1>
+        <p className="text-sm text-text-muted">Route supported IDE traffic through 9Router with local DNS interception.</p>
+      </div>
       {/* MITM Server Card */}
       <MitmServerCard
         apiKeys={apiKeys}
@@ -84,7 +88,7 @@ export default function MitmPageClient() {
       />
 
       {/* Tool Cards */}
-      <div className="flex flex-col gap-2">
+      <div className="grid gap-3 sm:gap-4">
         {mitmTools.map(([toolId, tool]) => (
           <MitmToolCard
             key={toolId}