feat(flights): integrate mission-planner into Flights page

- Port mission-planner flight planning to main app (Tailwind, react-leaflet v5, react-i18next)
- Add FlightMap with click-to-add waypoints, draggable markers, polyline with arrows
- Add FlightParamsPanel with action modes, waypoint list (drag-reorder), altitude chart, wind, JSON import/export
- Add FlightListSidebar with create/delete and telemetry date
- Add collapsible left panel with quick action mode shortcuts
- Add work area / no-go zone drawing via manual mouse events (L.rectangle)
- Add AltitudeDialog and JsonEditorDialog (Tailwind modals)
- Add battery/time/distance calculations per waypoint segment
- Add satellite/classic map toggle and mini-map on point drag
- Add Camera FOV and Communication Addr fields
- Add current position display under location search
- Merge mission-planner translations under flights.planner.*
- Gitignore .superpowers session data

src/features/flights/AltitudeChart.tsx

@@ -0,0 +1,44 @@
+import { Line } from 'react-chartjs-2'
+import 'chart.js/auto'
+import { useTranslation } from 'react-i18next'
+import type { FlightPoint } from './types'
+
+interface Props {
+  points: FlightPoint[]
+}
+
+export default function AltitudeChart({ points }: Props) {
+  const { t } = useTranslation()
+
+  if (points.length === 0) return null
+
+  const data = {
+    labels: points.map((_, i) => i + 1),
+    datasets: [{
+      label: t('flights.planner.altitude'),
+      data: points.map(p => p.altitude),
+      borderColor: '#228be6',
+      backgroundColor: 'rgba(34,139,230,0.2)',
+      pointBackgroundColor: '#fd7e14',
+      pointBorderColor: '#1e1e1e',
+      pointBorderWidth: 1,
+      tension: 0.1,
+    }],
+  }
+
+  const options = {
+    responsive: true,
+    maintainAspectRatio: false,
+    plugins: { legend: { display: false } },
+    scales: {
+      x: { ticks: { font: { size: 10 }, color: '#6c757d' }, grid: { color: '#495057' } },
+      y: { ticks: { font: { size: 10 }, color: '#6c757d' }, grid: { color: '#495057' } },
+    },
+  }
+
+  return (
+    <div className="h-16">
+      <Line data={data} options={options} />
+    </div>
+  )
+}