fix: widen connection selector to fit environment badge

Changed from fixed w-[200px] to w-auto max-w-[280px] so the trigger
sizes to its content without clipping the environment badge.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/connections/ConnectionSelector.tsx

@@ -27,7 +27,7 @@ export function ConnectionSelector() {
       value={activeConnectionId ?? undefined}
       onValueChange={setActiveConnectionId}
     >
-      <SelectTrigger className="h-7 w-[200px] text-xs">
+      <SelectTrigger className="h-7 w-auto max-w-[280px] text-xs">
         <SelectValue placeholder="Select connection" />
       </SelectTrigger>
       <SelectContent>