feat: multi-OpenClaw CLI detection/binding + i18n infrastructure

Multi-OpenClaw Detection & Binding:
- Add resolve_openclaw_cli_path() and classify_cli_source() in utils.rs
- Support openclawCliPath binding in clawpanel.json (user selects CLI)
- VersionInfo now includes cli_path, cli_source, all_installations
- scan_all_installations() detects all OpenClaw installs on system
- Dashboard shows CLI source label + multi-install warning
- Settings page: CLI binding UI with auto-detect and manual selection
- dev-api.js synced with cli_path/cli_source fields for Web mode

i18n Infrastructure:
- Create src/lib/i18n.js core module (t(), setLang(), initI18n())
- Create src/locales/zh-CN.json and src/locales/en.json
- Sidebar fully i18n-ized (nav labels, sections, instance switcher)
- Dashboard stat cards fully i18n-ized
- Settings page: language switcher UI (live reload)
- initI18n() called in main.js on startup

src-tauri/src/utils.rs

@@ -1,11 +1,30 @@
 #[cfg(target_os = "windows")]
 use std::os::windows::process::CommandExt;
 
+/// 读取 clawpanel.json 中用户绑定的 CLI 路径
+fn bound_cli_path() -> Option<std::path::PathBuf> {
+    let config = crate::commands::read_panel_config_value()?;
+    let raw = config.get("openclawCliPath")?.as_str()?;
+    if raw.is_empty() {
+        return None;
+    }
+    let p = std::path::PathBuf::from(raw);
+    if p.exists() {
+        Some(p)
+    } else {
+        None
+    }
+}
+
 /// Windows: 在 PATH 中查找 openclaw.cmd 的完整路径
 /// 避免通过 `cmd /c openclaw` 调用时 npm .cmd shim 中的引号导致
 /// "\"node\"" is not recognized 错误
 #[cfg(target_os = "windows")]
 fn find_openclaw_cmd() -> Option<std::path::PathBuf> {
+    // 优先使用用户绑定的路径
+    if let Some(bound) = bound_cli_path() {
+        return Some(bound);
+    }
     let path = crate::commands::enhanced_path();
     for dir in path.split(';') {
         let candidate = std::path::Path::new(dir).join("openclaw.cmd");
@@ -16,6 +35,62 @@ fn find_openclaw_cmd() -> Option<std::path::PathBuf> {
     None
 }
 
+/// 解析当前实际使用的 openclaw CLI 完整路径（跨平台）
+pub fn resolve_openclaw_cli_path() -> Option<String> {
+    // 优先使用用户绑定的路径
+    if let Some(bound) = bound_cli_path() {
+        return Some(bound.to_string_lossy().to_string());
+    }
+    #[cfg(target_os = "windows")]
+    {
+        let path = crate::commands::enhanced_path();
+        for dir in path.split(';') {
+            let candidate = std::path::Path::new(dir).join("openclaw.cmd");
+            if candidate.exists() {
+                return Some(candidate.to_string_lossy().to_string());
+            }
+        }
+        None
+    }
+    #[cfg(not(target_os = "windows"))]
+    {
+        let path = crate::commands::enhanced_path();
+        let sep = ':';
+        for dir in path.split(sep) {
+            let candidate = std::path::Path::new(dir).join("openclaw");
+            if candidate.exists() {
+                return Some(candidate.to_string_lossy().to_string());
+            }
+        }
+        None
+    }
+}
+
+/// 根据 CLI 路径判断安装来源
+pub fn classify_cli_source(cli_path: &str) -> String {
+    let lower = cli_path.replace('\\', "/").to_lowercase();
+    // standalone 安装
+    if lower.contains("/programs/openclaw/")
+        || lower.contains("/openclaw-bin/")
+        || lower.contains("/opt/openclaw/")
+    {
+        return "standalone".into();
+    }
+    // npm 汉化版
+    if lower.contains("openclaw-zh") || lower.contains("@qingchencloud") {
+        return "npm-zh".into();
+    }
+    // npm 全局（大概率官方版）
+    if lower.contains("/npm/") || lower.contains("/node_modules/") {
+        return "npm-official".into();
+    }
+    // Homebrew
+    if lower.contains("/homebrew/") || lower.contains("/usr/local/bin") {
+        return "npm-global".into();
+    }
+    "unknown".into()
+}
+
 /// 跨平台获取 openclaw 命令的方法（同步版本）
 #[allow(dead_code)]
 pub fn openclaw_command() -> std::process::Command {
@@ -42,7 +117,10 @@ pub fn openclaw_command() -> std::process::Command {
     }
     #[cfg(not(target_os = "windows"))]
     {
-        let mut cmd = std::process::Command::new("openclaw");
+        let bin = bound_cli_path()
+            .map(|p| p.to_string_lossy().to_string())
+            .unwrap_or_else(|| "openclaw".into());
+        let mut cmd = std::process::Command::new(bin);
         cmd.env("PATH", crate::commands::enhanced_path());
         crate::commands::apply_proxy_env(&mut cmd);
         cmd
@@ -74,7 +152,10 @@ pub fn openclaw_command_async() -> tokio::process::Command {
     }
     #[cfg(not(target_os = "windows"))]
     {
-        let mut cmd = tokio::process::Command::new("openclaw");
+        let bin = bound_cli_path()
+            .map(|p| p.to_string_lossy().to_string())
+            .unwrap_or_else(|| "openclaw".into());
+        let mut cmd = tokio::process::Command::new(bin);
         cmd.env("PATH", crate::commands::enhanced_path());
         crate::commands::apply_proxy_env_tokio(&mut cmd);
         cmd