Add Hytale config editor and Prometheus integration

- Add Node Exporter target for Hytale server (10.0.30.204:9100)
- Add Hytale config read/write functions to ssh.js
- Add GET/PUT /hytale/config API routes
- Create HytaleConfigEditor.jsx with JSON syntax highlighting
- Add Hytale config tab to ServerDetail.jsx
- Add stopCmd and port to Hytale server config

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

gsm-backend/routes/servers.js

@@ -4,7 +4,7 @@ import { dirname, join } from 'path';
 import { fileURLToPath } from 'url';
 import { EmbedBuilder } from 'discord.js';
 import { authenticateToken, optionalAuth, requireRole, rejectGuest } from '../middleware/auth.js';
-import { getServerStatus, startServer, stopServer, restartServer, getConsoleLog, getProcessUptime, listFactorioSaves, createFactorioWorld, deleteFactorioSave, getFactorioCurrentSave, isHostFailed, listZomboidConfigs, readZomboidConfig, writeZomboidConfig, listPalworldConfigs, readPalworldConfig, writePalworldConfig, readTerrariaConfig, writeTerrariaConfig, readOpenTTDConfig, writeOpenTTDConfig } from '../services/ssh.js';
+import { getServerStatus, startServer, stopServer, restartServer, getConsoleLog, getProcessUptime, listFactorioSaves, createFactorioWorld, deleteFactorioSave, getFactorioCurrentSave, isHostFailed, listZomboidConfigs, readZomboidConfig, writeZomboidConfig, listPalworldConfigs, readPalworldConfig, writePalworldConfig, readTerrariaConfig, writeTerrariaConfig, readOpenTTDConfig, writeOpenTTDConfig, readHytaleConfig, writeHytaleConfig } from '../services/ssh.js';
 import { sendRconCommand, getPlayers, getPlayerList } from '../services/rcon.js';
 import { getServerMetricsHistory, getCurrentMetrics } from '../services/prometheus.js';
 import { initWhitelistCache, getCachedWhitelist, setCachedWhitelist, initFactorioTemplates, getFactorioTemplates, createFactorioTemplate, deleteFactorioTemplate, initFactorioWorldSettings, getFactorioWorldSettings, saveFactorioWorldSettings, deleteFactorioWorldSettings, initAutoShutdownSettings, getAutoShutdownSettings, setAutoShutdownSettings, initActivityLog, logActivity, getActivityLog, initServerDisplaySettings, getServerDisplaySettings, getAllServerDisplaySettings, setServerDisplaySettings, initGuildSettings } from '../db/init.js';
@@ -502,6 +502,47 @@ router.put("/openttd/config", authenticateToken, requireRole("moderator"), async
   }
 });
 
+// ============ HYTALE ROUTES ============
+
+// Get Hytale config
+router.get("/hytale/config", authenticateToken, requireRole("moderator"), async (req, res) => {
+  try {
+    const config = loadConfig();
+    const server = config.servers.find(s => s.id === "hytale");
+    if (!server) return res.status(404).json({ error: "Server not found" });
+
+    if (isHostFailed(server.host, server.sshUser)) {
+      return res.status(503).json({ error: "Server host is unreachable", unreachable: true });
+    }
+
+    const content = await readHytaleConfig(server);
+    res.json({ content });
+  } catch (error) {
+    console.error("Error reading Hytale config:", error);
+    if (error.message.includes('unreachable') || error.message.includes('ECONNREFUSED') || error.message.includes('ETIMEDOUT')) {
+      return res.status(503).json({ error: 'Server host is unreachable', unreachable: true });
+    }
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Save Hytale config
+router.put("/hytale/config", authenticateToken, requireRole("moderator"), async (req, res) => {
+  try {
+    const config = loadConfig();
+    const server = config.servers.find(s => s.id === "hytale");
+    if (!server) return res.status(404).json({ error: "Server not found" });
+    const { content } = req.body;
+    if (!content) return res.status(400).json({ error: "Content required" });
+    await writeHytaleConfig(server, content);
+    logActivity(req.user.id, req.user.username, "hytale_config", "hytale", "config.json", req.user.discordId, req.user.avatar);
+    res.json({ success: true });
+  } catch (error) {
+    console.error("Error writing Hytale config:", error);
+    res.status(500).json({ error: error.message });
+  }
+});
+
 
 // Get single server (guests not allowed)
 router.get('/:id', authenticateToken, rejectGuest, async (req, res) => {