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";

frontend/src/pages/MedicationsPage.tsx

@@ -1,3 +1,6 @@
+/* biome-ignore-all lint/a11y/noLabelWithoutControl: form uses custom inputs and display fields wrapped in label-like layout */
+/* biome-ignore-all lint/correctness/useExhaustiveDependencies: modal-history callbacks are intentionally managed outside hook deps */
+/* biome-ignore-all lint/suspicious/noArrayIndexKey: local draft intake rows do not have stable ids before persistence */
 import { Bell, Eye, Minus, Pencil, Plus, Trash2 } from "lucide-react";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { useTranslation } from "react-i18next";
@@ -7,7 +10,7 @@ import { useAuth } from "../components/Auth";
 import { useAppContext, useUnsavedChanges } from "../context";
 import { useMedicationForm, useModalHistory, useUnsavedChangesWarning } from "../hooks";
 import type { DoseUnit, Medication } from "../types";
-import { DOSE_UNITS, FIELD_LIMITS, getMedTotal, getPackageSize } from "../types";
+import { DOSE_UNITS, FIELD_LIMITS, getPackageSize } from "../types";
 import { combineDateAndTime, formatDate, formatDateTime, formatNumber } from "../utils/formatters";
 import { log } from "../utils/logger";
 
@@ -31,7 +34,6 @@ export function MedicationsPage() {
 		deleteMedImage,
 		uploadingImage,
 		existingPeople,
-		coverage,
 		coverageByMed,
 	} = useAppContext();
 

frontend/src/pages/PlannerPage.tsx

@@ -1,3 +1,4 @@
+/* biome-ignore-all lint/a11y/noLabelWithoutControl: planner uses custom DateTimeInput control wrappers */
 import { useEffect, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { DateTimeInput, MedicationAvatar } from "../components";

frontend/src/pages/SchedulePage.tsx

@@ -1,3 +1,4 @@
+/* biome-ignore-all lint/style/noNestedTernary: schedule timeline branches are intentionally explicit */
 import { Bell } from "lucide-react";
 import { useTranslation } from "react-i18next";
 import { MedicationAvatar } from "../components";

frontend/src/pages/SettingsPage.tsx

@@ -1,3 +1,4 @@
+/* biome-ignore-all lint/a11y/noLabelWithoutControl: settings rows use label-styled text with adjacent custom toggle controls */
 import { useTranslation } from "react-i18next";
 import { ConfirmModal, ExportModal } from "../components";
 import { useAppContext } from "../context";