refactor(HAI-116): rename kb to hai across all packages, CLI, and docs

- Rename npm packages from @kb/* to @hai/* and update all workspace references
- Rename CLI binary from kb to hai and config directory from .kb to .hai
- Update dashboard UI branding, titles, and references from kb to hai
- Update all test files, CI workflows, and documentation to reflect new naming
- Run comprehensive grep verification to ensure no stale kb references remain

packages/dashboard/app/components/TaskDetailModal.tsx

@@ -1,8 +1,8 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import ReactMarkdown from "react-markdown";
 import remarkGfm from "remark-gfm";
-import type { Task, TaskDetail, TaskAttachment, Column, MergeResult } from "@hai/core";
-import { COLUMN_LABELS, VALID_TRANSITIONS } from "@hai/core";
+import type { Task, TaskDetail, TaskAttachment, Column, MergeResult } from "@kb/core";
+import { COLUMN_LABELS, VALID_TRANSITIONS } from "@kb/core";
 import { uploadAttachment, deleteAttachment, updateTask, pauseTask, unpauseTask } from "../api";
 import type { ToastType } from "../hooks/useToast";
 import { useAgentLogs } from "../hooks/useAgentLogs";