feat: 实现动态插件系统 (6阶段完成)

- 阶段1: 消息类型序列化 (Serialize/Deserialize, &'static str → String)
- 阶段2: FFI 边界类型 + Plugin SDK (plugin_abi, showen-plugin-sdk crate)
- 阶段3: PluginLoader + DynamicPlugin (libloading 动态加载 .so)
- 阶段4: 版本管理 + 错误策略 (VersionManager, PluginState, 自动回退)
- 阶段5: 远程仓库客户端 (HTTP 下载 + tar.gz 安装)
- 阶段6: 示例插件 + HTTP 管理 API + 全目录 README 文档

54/54 测试通过，0 warnings。

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/core/tests.rs

@@ -77,14 +77,18 @@ fn message_label(message: &Message) -> String {
 }
 
 struct TestPlugin {
-    id: &'static str,
-    deps: Vec<&'static str>,
+    id: String,
+    deps: Vec<String>,
     events: Arc<Mutex<Vec<String>>>,
 }
 
 impl TestPlugin {
-    fn new(id: &'static str, deps: Vec<&'static str>, events: Arc<Mutex<Vec<String>>>) -> Self {
-        Self { id, deps, events }
+    fn new(id: &str, deps: Vec<&str>, events: Arc<Mutex<Vec<String>>>) -> Self {
+        Self {
+            id: id.to_string(),
+            deps: deps.into_iter().map(|s| s.to_string()).collect(),
+            events,
+        }
     }
 
     fn record(&self, entry: impl Into<String>) {
@@ -93,20 +97,20 @@ impl TestPlugin {
 }
 
 impl Plugin for TestPlugin {
-    fn id(&self) -> &'static str {
-        self.id
+    fn id(&self) -> &str {
+        &self.id
     }
 
     fn info(&self) -> PluginInfo {
         PluginInfo {
-            name: self.id,
-            version: "test",
-            description: "test plugin",
+            name: self.id.clone(),
+            version: "test".to_string(),
+            description: "test plugin".to_string(),
             platform: Platform::Any,
         }
     }
 
-    fn dependencies(&self) -> Vec<&'static str> {
+    fn dependencies(&self) -> Vec<String> {
         self.deps.clone()
     }
 
@@ -168,8 +172,8 @@ fn routes_plugin_broadcast_and_manager_messages() {
 
     sender
         .send(Envelope {
-            from: "alpha",
-            to: Destination::Plugin("beta"),
+            from: "alpha".to_string(),
+            to: Destination::Plugin("beta".to_string()),
             message: Message::Custom {
                 kind: "direct".to_string(),
                 payload: "hello".to_string(),
@@ -178,7 +182,7 @@ fn routes_plugin_broadcast_and_manager_messages() {
         .expect("direct message should send");
     sender
         .send(Envelope {
-            from: "alpha",
+            from: "alpha".to_string(),
             to: Destination::Broadcast,
             message: Message::Custom {
                 kind: "broadcast".to_string(),
@@ -188,14 +192,14 @@ fn routes_plugin_broadcast_and_manager_messages() {
         .expect("broadcast message should send");
     sender
         .send(Envelope {
-            from: "alpha",
+            from: "alpha".to_string(),
             to: Destination::Manager,
-            message: Message::PluginReady("alpha"),
+            message: Message::PluginReady("alpha".to_string()),
         })
         .expect("manager message should send");
     sender
         .send(Envelope {
-            from: "test",
+            from: "test".to_string(),
             to: Destination::Manager,
             message: Message::Shutdown,
         })
@@ -301,14 +305,14 @@ fn wifi_result_sent_to_manager_is_broadcast_to_plugins() {
 
     sender
         .send(Envelope {
-            from: "wifi",
+            from: "wifi".to_string(),
             to: Destination::Manager,
             message: Message::WifiResult("connected".to_string()),
         })
         .expect("wifi result should send");
     sender
         .send(Envelope {
-            from: "test",
+            from: "test".to_string(),
             to: Destination::Manager,
             message: Message::Shutdown,
         })
@@ -379,8 +383,8 @@ fn all_plugin_ids_must_be_unique() {
 
     let mut ids = HashSet::new();
     for plugin in plugins {
-        let id = plugin.id();
-        assert!(ids.insert(id), "duplicate plugin id detected: '{}'", id);
+        let id = plugin.id().to_string();
+        assert!(ids.insert(id.clone()), "duplicate plugin id detected: '{}'", id);
     }
 }