feat: add SFX volume control and improve audio feedback

- Implemented separate sound effects volume control in settings.
- Updated backend to handle new `sfx_volume` parameter.
- Enhanced UI to include sound effects volume slider in admin panel.
- Integrated sound effects for various user interactions (clicks, navigation, alerts).
- Added a new global sound engine to manage audio synthesis without external files.
- Updated documentation for Docker deployment and Windows packaging.
- Refactored audio context management to ensure sound effects are available post user interaction.

src-tauri/src/lib.rs

@@ -1,5 +1,43 @@
 // 说明：早期 Rust 内嵌后端（server/storage/models/events，axum :10801）已随架构迁移到
-// Python 后端（FastAPI :10085）而移除；当前 Rust 侧仅负责窗口与生命周期。
+// Python 后端（FastAPI :10085）而移除；当前 Rust 侧仅负责窗口与生命周期，
+// 外加一个「运行时配置读取」命令（供前端读取 exe 旁 config.json，部署免重打包改地址）。
+
+use std::fs;
+use std::path::PathBuf;
+use tauri::{AppHandle, Manager};
+
+/// 读取运行时配置（部署用，免重新打包）：
+///   1) exe 同目录 config.json / dpm.config.json（最高优先）
+///   2) 应用配置目录 config.json
+/// 内容示例：
+///   { "api_base": "http://192.168.1.9:10085",
+///     "mqtt_url": "ws://192.168.1.3:8083/mqtt",
+///     "mqtt_username": "dpm", "mqtt_password": "123456" }
+/// 返回 JSON 字符串；未配置返回 null。
+#[tauri::command]
+fn read_runtime_config(app: AppHandle) -> Option<String> {
+    let mut candidates: Vec<PathBuf> = Vec::new();
+    if let Ok(exe) = std::env::current_exe() {
+        if let Some(dir) = exe.parent() {
+            candidates.push(dir.join("config.json"));
+            candidates.push(dir.join("dpm.config.json"));
+        }
+    }
+    if let Ok(dir) = app.path().app_config_dir() {
+        candidates.push(dir.join("config.json"));
+    }
+    for p in candidates {
+        if p.exists() {
+            if let Ok(s) = fs::read_to_string(&p) {
+                let t = s.trim();
+                if t.starts_with('{') {
+                    return Some(t.to_string());
+                }
+            }
+        }
+    }
+    None
+}
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
@@ -9,6 +47,7 @@ pub fn run() {
             tauri_plugin_autostart::MacosLauncher::LaunchAgent,
             Some(vec![]),
         ))
+        .invoke_handler(tauri::generate_handler![read_runtime_config])
         .on_window_event(|window, event| {
             if let tauri::WindowEvent::CloseRequested { api, .. } = event {
                 api.prevent_close();