Add Typed Display Settings Administration

Implements admin-only Display settings with generation-checked
Apply, Save, Load, Defaults, and Reset operations across the web UI,
CLI, SSH dispatcher, and local UI owner. Adds bounded HTTP handling,
session-isolated operation results, browser lifecycle support, and
comprehensive host tests and documentation.

src/admin_ssh_console.c

@@ -19,6 +19,7 @@
 #include "web_serial_settings.h"
 #include "web_account_settings.h"
 #include "web_network_settings.h"
+#include "web_display_settings.h"
 
 #define ADMIN_SSH_CONSOLE_MAX_SESSIONS 2U
 #define ADMIN_SSH_CONSOLE_OUTPUT_CAPACITY 4096U
@@ -87,6 +88,7 @@ typedef enum {
     ADMIN_REQUEST_SERIAL_SETTINGS,
     ADMIN_REQUEST_ACCOUNT_SETTINGS,
     ADMIN_REQUEST_NETWORK_SETTINGS,
+    ADMIN_REQUEST_DISPLAY_SETTINGS,
 } admin_request_origin_t;
 
 typedef struct {
@@ -100,6 +102,7 @@ typedef struct {
         uint32_t serial_settings_id;
         uint32_t account_settings_id;
         uint32_t network_settings_id;
+        uint32_t display_settings_id;
     };
 } admin_request_t;
 
@@ -685,6 +688,16 @@ esp_err_t admin_ssh_console_submit_network_settings(uint32_t id)
     return xQueueSend(s_request_queue, &request, 0U) == pdTRUE ? ESP_OK : ESP_ERR_TIMEOUT;
 }
 
+esp_err_t admin_ssh_console_submit_display_settings(uint32_t id)
+{
+    taskENTER_CRITICAL(&s_lock);
+    bool ready = s_dispatch_ready;
+    taskEXIT_CRITICAL(&s_lock);
+    if (!ready || !id) return ESP_ERR_INVALID_STATE;
+    admin_request_t request = {.origin = ADMIN_REQUEST_DISPLAY_SETTINGS, .display_settings_id = id};
+    return xQueueSend(s_request_queue, &request, 0U) == pdTRUE ? ESP_OK : ESP_ERR_TIMEOUT;
+}
+
 static void worker_task(void *context)
 {
     (void)context;
@@ -694,10 +707,11 @@ static void worker_task(void *context)
             continue;
         }
         if (request.origin == ADMIN_REQUEST_SERIAL_SETTINGS || request.origin == ADMIN_REQUEST_ACCOUNT_SETTINGS ||
-            request.origin == ADMIN_REQUEST_NETWORK_SETTINGS) {
+            request.origin == ADMIN_REQUEST_NETWORK_SETTINGS || request.origin == ADMIN_REQUEST_DISPLAY_SETTINGS) {
             if (request.origin == ADMIN_REQUEST_SERIAL_SETTINGS) web_serial_settings_execute(request.serial_settings_id);
             else if (request.origin == ADMIN_REQUEST_ACCOUNT_SETTINGS) web_account_settings_execute(request.account_settings_id);
-            else web_network_settings_execute(request.network_settings_id);
+            else if (request.origin == ADMIN_REQUEST_NETWORK_SETTINGS) web_network_settings_execute(request.network_settings_id);
+            else web_display_settings_execute(request.display_settings_id);
             secure_wipe(&request, sizeof(request));
             continue;
         }