chore: fix all Biome lint warnings and MedDetail intake bell icons (#265)

- Backend: refactor nested ternaries, remove unused imports/any types
- Frontend: fix exhaustive deps, a11y label associations, array index keys,
  empty CSS blocks, unused vars, type annotations
- MedDetail modal: fix intake schedule bell icons not rendering (use unified
  intake source with fallback), place bell inline after person name
- MedDetail modal: revert schedule rows from grid to flexbox layout

Closes #264

frontend/src/pages/DashboardPage.tsx

@@ -1,3 +1,4 @@
+/* biome-ignore-all lint/style/noNestedTernary: timeline rendering uses explicit UI-state branching */
 import { Bell, NotebookPen, Share2 } from "lucide-react";
 import { useState } from "react";
 import { useTranslation } from "react-i18next";