Teams integration: webhook messaging + configuración en Settings + plugin-http

- @tauri-apps/plugin-http instalado (npm + Cargo.toml + capabilities)
- src-tauri/src/main.rs: registrado tauri_plugin_http::init()
- services/teams.ts: servicio para enviar mensajes Teams via webhook
  soporta Tauri plugin y browser fetch con fallback automático
  incluye notifyHUCreated, notifyBlockerLogged, sendTestMessage
- SettingsView: nueva sección Teams con input de webhook URL + botón test
- ChartAreaInteractive.vue: removido import no usado (@unovis/vue)

src-tauri/Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 tauri = { version = "2", features = [] }
 tauri-plugin-opener = "2"
+tauri-plugin-http = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 libsql = "0.9"