fix(chat): restrict to authenticated users only, fix overlay transparency

apps/web/src/components/chat/Chat.tsx

@@ -342,6 +342,31 @@ export const Chat = forwardRef<ChatRef, ChatProps>(function Chat(
       )}
 
       {/* Input Area */}
+      {!user && (
+        <div className="mx-4 mb-2 lg:mx-auto lg:max-w-4xl lg:px-8">
+          <div
+            className="flex items-center justify-center gap-2 rounded-lg border px-4 py-3 text-center"
+            style={{
+              backgroundColor: "rgb(var(--surface-1))",
+              borderColor: "rgb(var(--border-default))",
+            }}
+          >
+            <svg
+              className="h-4 w-4"
+              style={{ color: "rgb(var(--text-secondary))" }}
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke="currentColor"
+              strokeWidth={2}
+            >
+              <path d="M15 7a2 2 0 012 2m4 0a6 6 0 01-7.743 5.743L11 17H9v2H7v2H4a1 1 0 01-1-1v-2.586a1 1 0 01.293-.707l5.964-5.964A6 6 0 1121 9z" />
+            </svg>
+            <span className="text-sm" style={{ color: "rgb(var(--text-secondary))" }}>
+              Sign in to chat with Jarvis
+            </span>
+          </div>
+        </div>
+      )}
       <div
         className="sticky bottom-0 border-t"
         style={{
@@ -352,7 +377,7 @@ export const Chat = forwardRef<ChatRef, ChatProps>(function Chat(
         <div className="mx-auto max-w-4xl px-4 py-4 lg:px-8">
           <ChatInput
             onSend={handleSendMessage}
-            disabled={isChatLoading}
+            disabled={isChatLoading || !user}
             inputRef={inputRef}
             isStreaming={isStreaming}
             onStopStreaming={abortStream}

apps/web/src/components/chat/ChatOverlay.tsx

@@ -55,8 +55,8 @@ export function ChatOverlay(): React.JSX.Element {
         onClick={open}
         className="fixed bottom-6 right-6 z-50 flex h-14 w-14 items-center justify-center rounded-full shadow-lg transition-all hover:scale-110 focus:outline-none focus:ring-2 focus:ring-offset-2 lg:bottom-8 lg:right-8"
         style={{
-          backgroundColor: "rgb(var(--accent-primary))",
-          color: "rgb(var(--text-on-accent))",
+          backgroundColor: "var(--accent-primary, #10b981)",
+          color: "var(--text-on-accent, #ffffff)",
         }}
         aria-label="Open chat"
         title="Open Jarvis chat (Cmd+Shift+J)"
@@ -78,18 +78,18 @@ export function ChatOverlay(): React.JSX.Element {
   if (isMinimized) {
     return (
       <div
-        className="fixed bottom-0 right-0 z-40 w-full sm:w-96"
+        className="fixed bottom-0 right-0 z-40 w-full shadow-2xl sm:w-96"
         style={{
-          backgroundColor: "rgb(var(--surface-0))",
-          borderColor: "rgb(var(--border-default))",
+          backgroundColor: "var(--surface-0, #ffffff)",
+          borderColor: "var(--border-default, #e5e7eb)",
         }}
       >
         <button
           onClick={expand}
           className="flex w-full items-center justify-between border-t px-4 py-3 text-left transition-colors hover:bg-black/5 focus:outline-none focus:ring-2 focus:ring-inset"
           style={{
-            borderColor: "rgb(var(--border-default))",
-            backgroundColor: "rgb(var(--surface-0))",
+            borderColor: "var(--border-default, #e5e7eb)",
+            backgroundColor: "var(--surface-0, #ffffff)",
           }}
           aria-label="Expand chat"
         >
@@ -135,10 +135,10 @@ export function ChatOverlay(): React.JSX.Element {
 
       {/* Chat Panel */}
       <div
-        className="fixed inset-y-0 right-0 z-40 flex w-full flex-col border-l sm:w-96 lg:inset-y-16"
+        className="fixed inset-y-0 right-0 z-40 flex w-full flex-col border-l shadow-2xl sm:w-96 lg:inset-y-16"
         style={{
-          backgroundColor: "rgb(var(--surface-0))",
-          borderColor: "rgb(var(--border-default))",
+          backgroundColor: "var(--surface-0, #ffffff)",
+          borderColor: "var(--border-default, #e5e7eb)",
         }}
       >
         {/* Header */}