feat: Add Vector stores UI (#2737)

# What does this PR do?
- Adds two pages to UI
  - Vector stores
  - Vector store detail view
- Fixed darkmode navbar highlighting
- Updated darkmode font color
- Updated llama-stack-client package

<img width="1916" height="734" alt="Screenshot 2025-07-12 at 11 34
35 PM"
src="https://github.com/user-attachments/assets/3f9b6727-ee82-4e6b-9555-2e3ef36d24d2"
/>

<img width="1912" height="910" alt="Screenshot 2025-07-12 at 11 57
09 PM"
src="https://github.com/user-attachments/assets/0c9d3b5e-5592-4dfb-8e04-a57edc9fb406"
/>


## Test Plan
<!-- Describe the tests you ran to verify your changes with result
summaries. *Provide clear instructions so the plan can be easily
re-executed.* -->

---------

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

llama_stack/ui/components/layout/app-sidebar.tsx

@@ -1,6 +1,11 @@
 "use client";
 
-import { MessageSquareText, MessagesSquare, MoveUpRight } from "lucide-react";
+import {
+  MessageSquareText,
+  MessagesSquare,
+  MoveUpRight,
+  Database,
+} from "lucide-react";
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { cn } from "@/lib/utils";
@@ -28,6 +33,11 @@ const logItems = [
     url: "/logs/responses",
     icon: MessagesSquare,
   },
+  {
+    title: "Vector Stores",
+    url: "/logs/vector-stores",
+    icon: Database,
+  },
   {
     title: "Documentation",
     url: "https://llama-stack.readthedocs.io/en/latest/references/api_reference/index.html",
@@ -57,13 +67,13 @@ export function AppSidebar() {
                       className={cn(
                         "justify-start",
                         isActive &&
-                          "bg-gray-200 hover:bg-gray-200 text-primary hover:text-primary",
+                          "bg-gray-200 dark:bg-gray-700 hover:bg-gray-200 dark:hover:bg-gray-700 text-gray-900 dark:text-gray-100",
                       )}
                     >
                       <Link href={item.url}>
                         <item.icon
                           className={cn(
-                            isActive && "text-primary",
+                            isActive && "text-gray-900 dark:text-gray-100",
                             "mr-2 h-4 w-4",
                           )}
                         />