feat: Gezeiten im Logbuch per Open-Meteo Marine

HW/NW-Felder im Reisetag und Live-Journal mit Server-Proxy auf Basis von
Open-Meteo Marine am GPS-Standort; neueste Position und frischer DB-Stand
vor dem Abruf, Bestätigung nach Übernehmen, Accordion-Layout bereinigt.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/src/routes/tides.ts

@@ -0,0 +1,60 @@
+import { Router } from 'express'
+import { requireUser } from '../middleware/auth.js'
+import {
+  fetchTidesForCoordinates,
+  fetchTidesForPlace
+} from '../utils/openMeteoTides.js'
+
+const router = Router()
+
+function parseLatLon(lat: unknown, lon: unknown): { lat: number; lon: number } | null {
+  const latNum = Number(lat)
+  const lonNum = Number(lon)
+  if (Number.isNaN(latNum) || Number.isNaN(lonNum)) return null
+  if (latNum < -90 || latNum > 90 || lonNum < -180 || lonNum > 180) return null
+  return { lat: latNum, lon: lonNum }
+}
+
+router.get('/nearby', requireUser, async (req, res) => {
+  try {
+    const coords = parseLatLon(req.query.lat, req.query.lon)
+    if (!coords) {
+      return res.status(400).json({ error: 'lat and lon are required' })
+    }
+
+    const data = await fetchTidesForCoordinates(coords.lat, coords.lon)
+    return res.json(data)
+  } catch (error: unknown) {
+    const message = error instanceof Error ? error.message : 'Tide lookup failed'
+    if (message === 'no_tide_data') {
+      return res.status(404).json({ error: 'no_tide_data' })
+    }
+    console.error('Error fetching nearby tides:', error)
+    return res.status(502).json({ error: message })
+  }
+})
+
+router.get('/by-place', requireUser, async (req, res) => {
+  try {
+    const query = typeof req.query.q === 'string' ? req.query.q.trim() : ''
+    if (!query) {
+      return res.status(400).json({ error: 'q is required' })
+    }
+
+    const data = await fetchTidesForPlace(query)
+    return res.json(data)
+  } catch (error: unknown) {
+    const status = (error as { status?: number }).status
+    const message = error instanceof Error ? error.message : 'Tide lookup failed'
+    if (status === 404 || message === 'place_not_found') {
+      return res.status(404).json({ error: 'place_not_found' })
+    }
+    if (message === 'no_tide_data') {
+      return res.status(404).json({ error: 'no_tide_data' })
+    }
+    console.error('Error fetching place tides:', error)
+    return res.status(502).json({ error: message })
+  }
+})
+
+export default router