chore: move src/llama_stack/ui to src/llama_stack_ui

# What does this PR do?


## Test Plan

src/llama_stack_ui/components/chat-completions/chat-completions-table.tsx

@@ -0,0 +1,73 @@
+"use client";
+
+import {
+  ChatCompletion,
+  UsePaginationOptions,
+  ListChatCompletionsResponse,
+} from "@/lib/types";
+import { ListChatCompletionsParams } from "@/lib/llama-stack-client";
+import { LogsTable, LogTableRow } from "@/components/logs/logs-table";
+import {
+  extractTextFromContentPart,
+  extractDisplayableText,
+} from "@/lib/format-message-content";
+import { usePagination } from "@/hooks/use-pagination";
+
+interface ChatCompletionsTableProps {
+  /** Optional pagination configuration */
+  paginationOptions?: UsePaginationOptions;
+}
+
+function formatChatCompletionToRow(completion: ChatCompletion): LogTableRow {
+  return {
+    id: completion.id,
+    input: extractTextFromContentPart(completion.input_messages?.[0]?.content),
+    output: extractDisplayableText(completion.choices?.[0]?.message),
+    model: completion.model,
+    createdTime: new Date(completion.created * 1000).toLocaleString(),
+    detailPath: `/logs/chat-completions/${completion.id}`,
+  };
+}
+
+export function ChatCompletionsTable({
+  paginationOptions,
+}: ChatCompletionsTableProps) {
+  const fetchFunction = async (
+    client: ReturnType<typeof import("@/hooks/use-auth-client").useAuthClient>,
+    params: {
+      after?: string;
+      limit: number;
+      model?: string;
+      order?: string;
+    }
+  ) => {
+    const response = await client.chat.completions.list({
+      after: params.after,
+      limit: params.limit,
+      ...(params.model && { model: params.model }),
+      ...(params.order && { order: params.order }),
+    } as ListChatCompletionsParams);
+
+    return response as ListChatCompletionsResponse;
+  };
+
+  const { data, status, hasMore, error, loadMore } = usePagination({
+    ...paginationOptions,
+    fetchFunction,
+    errorMessagePrefix: "chat completions",
+  });
+
+  const formattedData = data.map(formatChatCompletionToRow);
+
+  return (
+    <LogsTable
+      data={formattedData}
+      status={status}
+      hasMore={hasMore}
+      error={error}
+      onLoadMore={loadMore}
+      caption="A list of your recent chat completions."
+      emptyMessage="No chat completions found."
+    />
+  );
+}