Add Wi-Fi scan details display and MQTT publish

- HTML: Add Wi-Fi scan results container to network.html
- Rust: Implement `wifi_scan_details()` with RSSI, channel, auth method
- API & UI: Fetch and display scan results in table format
- MQTT: Publish top 10 networks sorted by RSSI to `/wifi_scan`

Software/MainBoard/rust/src/webserver/mod.rs

@@ -12,6 +12,7 @@ use crate::webserver::backup_manager::{backup_config, backup_info, get_backup_co
 use crate::webserver::get_json::{
     delete_save, get_battery_state, get_config, get_live_moisture, get_log_localization_config,
     get_firmware_info_web, get_solar_state, get_time, get_timezones, list_saves, tank_info,
+    get_wifi_details,
 };
 use crate::webserver::get_log::{get_live_log, get_log};
 use crate::webserver::get_static::{serve_bundle, serve_favicon, serve_index};
@@ -83,6 +84,7 @@ impl Handler for HTTPRequestRouter {
                             "/timezones" => Some(get_timezones().await),
                             "/moisture" => Some(get_live_moisture(conn).await),
                             "/list_saves" => Some(list_saves(conn).await),
+                            "/wifi_details" => Some(get_wifi_details(conn).await),
                             // /live_log accepts an optional ?after=N query parameter
                             p if p == "/live_log" || p.starts_with("/live_log?") => {
                                 let after: Option<u64> = p