Merge /conditions into the app as a Station tab

- New Station tab (top tabs, bottom nav, swipe order) carrying the old /conditions look:
  radar-ring hero, condition pill, wind compass, atmosphere/precip/solar cards, indoor
- Scoped sl-* styles and station-live.js; units follow the app's metric/imperial setting
- Empty/error states when no station is connected
- /conditions now 301-redirects to /?tab=station; removed conditions.html,
  /api/conditions/public and the old My Station drawer
- /api/ambient-config also returns the station name
- Dashboard and settings links updated; SW cache v8; manifest shortcut for Station
- Drops an indoor-temp block in applyStationOverlay that referenced an out-of-scope helper

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/server.js

@@ -1038,7 +1038,7 @@ app.post('/api/ambient-config', requireDashboardAuth, requireAdmin, (req, res) =
 // Return whether server-side keys exist (never expose the actual keys)
 app.get('/api/ambient-config', (_req, res) => {
   const hasKeys = !!(ambientServerConfig.apiKey && ambientServerConfig.appKey);
-  res.json({ configured: hasKeys });
+  res.json({ configured: hasKeys, stationName: dashAuth?.stationName || null });
 });
 
 app.get('/api/ambient', async (req, res) => {
@@ -1714,17 +1714,8 @@ app.get('/api/station/anomaly', requireDashboardAuth, (_req, res) => {
   res.json({ available: true, hourStats, anomaly: z > 2 ? 'above' : z < -2 ? 'below' : 'normal', currentTemp: last.tempf, currentHour: h, mean: stat?.mean, stddev: stat?.stddev });
 });
 
-// Public conditions page + API (no auth required)
-app.get('/conditions', (_req, res) => {
-  res.sendFile(path.join(__dirname, 'public', 'conditions.html'));
-});
-app.get('/api/conditions/public', (_req, res) => {
-  if (!ambientServerConfig.apiKey) return res.status(503).json({ error: 'Not configured' });
-  const cached = ambientCaches.get(ambientServerConfig.apiKey);
-  const data = cached?.data?.[0]?.lastData || null;
-  if (!data) return res.json(null);
-  res.json({ ...data, stationName: dashAuth?.stationName || 'Genesis 8:22' });
-});
+// The old standalone /conditions page now lives in the app as the Station tab
+app.get('/conditions', (_req, res) => res.redirect(301, '/?tab=station'));
 
 // ── Dashboard management APIs ─────────────────────────────────────────────────