Add Tool Management panel with per-platform toggle switches

New Tools section in the Manage group:
- Platform tabs parsed from config.yaml (CLI, Telegram, Discord, etc.)
- Lists all toolsets with emoji icon, name, description, and toggle
- Toggle switches call hermes tools enable/disable under the hood
- Shows enabled count vs total
- MCP server status section at bottom
- Optimistic UI update on toggle with CLI fallback

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scarf/scarf/Navigation/AppCoordinator.swift

@@ -8,6 +8,7 @@ enum SidebarSection: String, CaseIterable, Identifiable {
     case chat = "Chat"
     case memory = "Memory"
     case skills = "Skills"
+    case tools = "Tools"
     case cron = "Cron"
     case logs = "Logs"
     case settings = "Settings"
@@ -23,6 +24,7 @@ enum SidebarSection: String, CaseIterable, Identifiable {
         case .chat: return "text.bubble"
         case .memory: return "brain"
         case .skills: return "lightbulb"
+        case .tools: return "wrench.and.screwdriver"
         case .cron: return "clock.arrow.2.circlepath"
         case .logs: return "doc.text"
         case .settings: return "gearshape"