style: refine chat UI consistency and enhance dark mode (#393)

src/components/settings/ProvidersSettings.tsx

@@ -319,7 +319,7 @@ function ProviderCard({
       setFallbackModelsText(normalizeFallbackModels(account.fallbackModels).join('\n'));
       setFallbackProviderIds(normalizeFallbackProviderIds(account.fallbackAccountIds));
     }
-  }, [isEditing, account.baseUrl, account.fallbackModels, account.fallbackAccountIds, account.model]);
+  }, [isEditing, account.baseUrl, account.fallbackModels, account.fallbackAccountIds, account.model, account.apiProtocol]);
 
   const fallbackOptions = allProviders.filter((candidate) => candidate.account.id !== account.id);
 
@@ -408,8 +408,8 @@ function ProviderCard({
       className={cn(
         "group flex flex-col p-4 rounded-2xl transition-all relative overflow-hidden",
         isDefault
-          ? "bg-white dark:bg-[#1a1a19] border border-blue-500/20 shadow-sm ring-1 ring-blue-500/20"
+          ? "bg-white dark:bg-[#1a1a19] border border-black/10 dark:border-white/10 shadow-sm"
-          : "bg-black/5 dark:bg-white/5 border border-transparent"
+          : "bg-transparent border border-black/10 dark:border-white/10"
       )}
     >
       <div className="flex items-center justify-between">
@@ -502,9 +502,9 @@ function ProviderCard({
       </div>
 
       {isEditing && (
-        <div className="space-y-4 mt-4 pt-4 border-t border-black/5 dark:border-white/5">
+        <div className="space-y-6 mt-4 pt-4 border-t border-black/5 dark:border-white/5">
           {canEditModelConfig && (
-            <div className="space-y-3 rounded-xl bg-[#eeece3] dark:bg-[#151514] border border-black/5 dark:border-white/5 p-4">
+            <div className="space-y-3">
               <p className="text-[14px] font-bold text-foreground/80">{t('aiProviders.sections.model')}</p>
               {typeInfo?.showBaseUrl && (
                 <div className="space-y-1.5">
@@ -551,7 +551,7 @@ function ProviderCard({
               )}
             </div>
           )}
-          <div className="space-y-3 rounded-xl bg-[#eeece3] dark:bg-[#151514] border border-black/5 dark:border-white/5 p-4">
+          <div className="space-y-3">
             <button
               onClick={() => setShowFallback(!showFallback)}
               className="flex items-center justify-between w-full text-[14px] font-bold text-foreground/80 hover:text-foreground transition-colors"
@@ -599,7 +599,7 @@ function ProviderCard({
               </div>
             )}
           </div>
-          <div className="space-y-3 rounded-xl bg-[#eeece3] dark:bg-[#151514] border border-black/5 dark:border-white/5 p-4">
+          <div className="space-y-3">
             <div className="flex items-center justify-between gap-3">
               <div className="space-y-0.5">
                 <Label className="text-[14px] font-bold text-foreground/80">{t('aiProviders.dialog.apiKey')}</Label>

src/pages/Chat/ChatInput.tsx

@@ -353,7 +353,7 @@ export function ChatInput({ onSend, onStop, disabled = false, sending = false, i
         )}
 
         {/* Input Row */}
-        <div className={`flex items-end gap-1.5 bg-white dark:bg-accent/50 rounded-[28px] shadow-sm border border-black/5 dark:border-white/10 p-1.5 transition-shadow ${dragOver ? 'ring-2 ring-primary' : 'focus-within:ring-1 focus-within:ring-black/5 dark:focus-within:ring-white/10'}`}>
+        <div className={`flex items-end gap-1.5 bg-white dark:bg-[#1a1a19] rounded-[28px] shadow-sm border p-1.5 transition-all ${dragOver ? 'border-primary ring-1 ring-primary' : 'border-black/10 dark:border-white/10'}`}>
 
           {/* Attach Button */}
           <Button
@@ -383,7 +383,7 @@ export function ChatInput({ onSend, onStop, disabled = false, sending = false, i
               onPaste={handlePaste}
               placeholder={disabled ? 'Gateway not connected...' : ''}
               disabled={disabled}
-              className="min-h-[40px] max-h-[200px] resize-none border-0 focus-visible:ring-0 shadow-none bg-transparent py-2.5 px-2 text-[15px] placeholder:text-muted-foreground/60 leading-relaxed"
+              className="min-h-[40px] max-h-[200px] resize-none border-0 focus-visible:ring-0 focus-visible:ring-offset-0 shadow-none bg-transparent py-2.5 px-2 text-[15px] placeholder:text-muted-foreground/60 leading-relaxed"
               rows={1}
             />
           </div>

src/pages/Chat/ChatMessage.tsx

@@ -4,7 +4,7 @@
  * with markdown, thinking sections, images, and tool cards.
  */
 import { useState, useCallback, useEffect, memo } from 'react';
-import { User, Sparkles, Copy, Check, ChevronDown, ChevronRight, Wrench, FileText, Film, Music, FileArchive, File, X, FolderOpen, ZoomIn, Loader2, CheckCircle2, AlertCircle } from 'lucide-react';
+import { Sparkles, Copy, Check, ChevronDown, ChevronRight, Wrench, FileText, Film, Music, FileArchive, File, X, FolderOpen, ZoomIn, Loader2, CheckCircle2, AlertCircle } from 'lucide-react';
 import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 import { createPortal } from 'react-dom';
@@ -71,16 +71,11 @@ export const ChatMessage = memo(function ChatMessage({
       )}
     >
       {/* Avatar */}
-      <div
+      {!isUser && (
-        className={cn(
+        <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-full mt-1 bg-black/5 dark:bg-white/5 text-foreground">
-          'flex h-8 w-8 shrink-0 items-center justify-center rounded-full mt-1',
+          <Sparkles className="h-4 w-4" />
-          isUser
-            ? 'bg-primary text-primary-foreground'
-            : 'bg-gradient-to-br from-indigo-500 to-purple-600 text-white',
-        )}
-      >
-        {isUser ? <User className="h-4 w-4" /> : <Sparkles className="h-4 w-4" />}
         </div>
+      )}
 
       {/* Content */}
       <div
@@ -148,7 +143,7 @@ export const ChatMessage = memo(function ChatMessage({
                 ) : (
                   <div
                     key={`local-${i}`}
-                    className="w-36 h-36 rounded-xl border overflow-hidden bg-muted flex items-center justify-center text-muted-foreground"
+                    className="w-36 h-36 rounded-xl border border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 flex items-center justify-center text-muted-foreground"
                   >
                     <File className="h-8 w-8" />
                   </div>
@@ -209,7 +204,7 @@ export const ChatMessage = memo(function ChatMessage({
               }
               if (isImage && !file.preview) {
                 return (
-                  <div key={`local-${i}`} className="w-36 h-36 rounded-xl border overflow-hidden bg-muted flex items-center justify-center text-muted-foreground">
+                  <div key={`local-${i}`} className="w-36 h-36 rounded-xl border border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 flex items-center justify-center text-muted-foreground">
                     <File className="h-8 w-8" />
                   </div>
                 );
@@ -286,7 +281,7 @@ function ToolStatusBar({
             {isError && <AlertCircle className="h-3.5 w-3.5 text-destructive shrink-0" />}
             <Wrench className="h-3 w-3 shrink-0 opacity-60" />
             <span className="font-mono text-[12px] font-medium">{tool.name}</span>
-            {duration && <span className="text-[11px] opacity-60">{duration}</span>}
+            {duration && <span className="text-[11px] opacity-60">{tool.summary ? `(${duration})` : duration}</span>}
             {tool.summary && (
               <span className="truncate text-[11px] opacity-70">{tool.summary}</span>
             )}
@@ -342,8 +337,8 @@ function MessageBubble({
         'relative rounded-2xl px-4 py-3',
         !isUser && 'w-full',
         isUser
-          ? 'bg-primary text-primary-foreground'
+          ? 'bg-[#0a84ff] text-white shadow-sm'
-          : 'bg-muted',
+          : 'bg-black/5 dark:bg-white/5 text-foreground',
       )}
     >
       {isUser ? (
@@ -398,7 +393,7 @@ function ThinkingBlock({ content }: { content: string }) {
   const [expanded, setExpanded] = useState(false);
 
   return (
-    <div className="w-full rounded-lg border border-border/50 bg-muted/30 text-sm">
+    <div className="w-full rounded-xl border border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 text-[14px]">
       <button
         className="flex items-center gap-2 w-full px-3 py-2 text-muted-foreground hover:text-foreground transition-colors"
         onClick={() => setExpanded(!expanded)}
@@ -437,7 +432,7 @@ function FileIcon({ mimeType, className }: { mimeType: string; className?: strin
 
 function FileCard({ file }: { file: AttachedFileMeta }) {
   return (
-    <div className="flex items-center gap-2 rounded-lg border border-border px-3 py-2 bg-muted/30 max-w-[220px]">
+    <div className="flex items-center gap-3 rounded-xl border border-black/10 dark:border-white/10 px-3 py-2.5 bg-black/5 dark:bg-white/5 max-w-[220px]">
       <FileIcon mimeType={file.mimeType} className="h-5 w-5 shrink-0 text-muted-foreground" />
       <div className="min-w-0 overflow-hidden">
         <p className="text-xs font-medium truncate">{file.fileName}</p>
@@ -469,7 +464,7 @@ function ImageThumbnail({
   void filePath; void base64; void mimeType;
   return (
     <div
-      className="relative w-36 h-36 rounded-xl border overflow-hidden bg-muted group/img cursor-zoom-in"
+      className="relative w-36 h-36 rounded-xl border overflow-hidden border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 group/img cursor-zoom-in"
       onClick={onPreview}
     >
       <img src={src} alt={fileName} className="w-full h-full object-cover" />
@@ -500,7 +495,7 @@ function ImagePreviewCard({
   void filePath; void base64; void mimeType;
   return (
     <div
-      className="relative max-w-xs rounded-lg border overflow-hidden group/img cursor-zoom-in"
+      className="relative max-w-xs rounded-xl border overflow-hidden border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 group/img cursor-zoom-in"
       onClick={onPreview}
     >
       <img src={src} alt={fileName} className="block w-full" />
@@ -595,7 +590,7 @@ function ToolCard({ name, input }: { name: string; input: unknown }) {
   const [expanded, setExpanded] = useState(false);
 
   return (
-    <div className="rounded-lg border border-border/50 bg-muted/20 text-sm">
+    <div className="rounded-xl border border-black/10 dark:border-white/10 bg-black/5 dark:bg-white/5 text-[14px]">
       <button
         className="flex items-center gap-2 w-full px-3 py-1.5 text-muted-foreground hover:text-foreground transition-colors"
         onClick={() => setExpanded(!expanded)}

src/pages/Chat/index.tsx

@@ -77,18 +77,7 @@ export function Chat() {
     }
   }, [sending, streamingTimestamp]);
 
-  // Gateway not running
+  // Gateway not running block has been completely removed so the UI always renders.
-  if (!isGatewayRunning) {
-    return (
-      <div className="flex h-[calc(100vh-8rem)] flex-col items-center justify-center text-center p-8">
-        <AlertCircle className="h-12 w-12 text-yellow-500 mb-4" />
-        <h2 className="text-xl font-semibold mb-2">{t('gatewayNotRunning')}</h2>
-        <p className="text-muted-foreground max-w-md">
-          {t('gatewayRequired')}
-        </p>
-      </div>
-    );
-  }
 
   const streamMsg = streamingMessage && typeof streamingMessage === 'object'
     ? streamingMessage as unknown as { role?: string; content?: unknown; timestamp?: number }