style: reduce vertical space in chat controls

- Reduce gap between control rows from gap-1 to gap-0.5
- Reduce vertical wrap gap from gap-y-2 to gap-y-1
- Reduce send button padding from px-2 py-1 to px-1.5 py-0.5

Author: ammar-agent

src/browser/components/ChatInput/index.tsx

@@ -1086,15 +1086,15 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
           {/* Image attachments */}
           <ImageAttachments images={imageAttachments} onRemove={handleRemoveImage} />
 
-          <div className="flex flex-col gap-1" data-component="ChatModeToggles">
+          <div className="flex flex-col gap-0.5" data-component="ChatModeToggles">
             {/* Editing indicator - workspace only */}
             {variant === "workspace" && editingMessage && (
               <div className="text-edit-mode text-[11px] font-medium">
                 Editing message ({formatKeybind(KEYBINDS.CANCEL_EDIT)} to cancel)
               </div>
             )}
 
-            <div className="@container flex flex-wrap items-center gap-x-3 gap-y-2">
+            <div className="@container flex flex-wrap items-center gap-x-3 gap-y-1">
               {/* Model Selector - always visible */}
               <div
                 className="flex items-center"
@@ -1176,7 +1176,7 @@ export const ChatInput: React.FC<ChatInputProps> = (props) => {
                     disabled={!canSend}
                     aria-label="Send message"
                     className={cn(
-                      "inline-flex items-center gap-1 rounded-sm border border-border-light px-2 py-1 text-[11px] font-medium text-white transition-colors duration-200 disabled:opacity-50",
+                      "inline-flex items-center gap-1 rounded-sm border border-border-light px-1.5 py-0.5 text-[11px] font-medium text-white transition-colors duration-200 disabled:opacity-50",
                       mode === "plan"
                         ? "bg-plan-mode hover:bg-plan-mode-hover disabled:hover:bg-plan-mode"
                         : "bg-exec-mode hover:bg-exec-mode-hover disabled:hover:bg-exec-mode"