chore(search): drop internal issue refs and external-project names from plugin search code

- Remove "(issue #477)" internal planning references from shipped Java
  (SearchProviderRegistry, PluginSearchBridge, and the two new tests) — code
  should describe what it does, not point at issue trackers.
- Drop "openclaw" external-project attribution from the search provider
  comments (SearchProviderRegistry, SearchCache, SearchQuery), restating them
  as objective functional descriptions.

mateclaw-server/src/main/java/vip/mate/plugin/bridge/PluginSearchBridge.java

@@ -13,7 +13,7 @@ import java.util.List;
 
 /**
  * Bridge that wraps a plugin's {@link PluginSearchProvider} into the platform's
- * internal {@link SearchProvider} interface (issue #477).
+ * internal {@link SearchProvider} interface.
  * <p>
  * The platform-side {@link SystemSettingsDTO} is intentionally ignored — plugin
  * providers read their own config via {@code PluginContext#getConfig}, keeping

mateclaw-server/src/main/java/vip/mate/tool/search/SearchCache.java

@@ -8,7 +8,7 @@ import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
 /**
- * 搜索结果内存缓存 — 借鉴 openclaw 的 SEARCH_CACHE 设计
+ * 搜索结果内存缓存
  *
  * <p>避免 Agent 同一对话中多次搜索相同/相似 query 时重复调用搜索 API。
  * <ul>

mateclaw-server/src/main/java/vip/mate/tool/search/SearchProviderRegistry.java

@@ -15,7 +15,7 @@ import java.util.stream.Collectors;
 /**
  * 搜索提供商注册表 — 收集所有 {@link SearchProvider} 实现，提供优先级排序与自动探测
  *
- * <p>借鉴 openclaw 的 provider auto-detect 机制：
+ * <p>provider 自动探测机制：
  * <ol>
  *   <li>用户显式配置的 primary provider → 直接使用</li>
  *   <li>按 autoDetectOrder 遍历，优先选有 credential 的 provider</li>
@@ -45,7 +45,7 @@ public class SearchProviderRegistry {
     }
 
     /**
-     * 注册一个插件提供的 provider（issue #477）。
+     * 注册一个插件提供的 provider。
      *
      * @throws IllegalArgumentException id 为空，或与内置/已注册插件 provider 冲突
      */
@@ -95,7 +95,7 @@ public class SearchProviderRegistry {
     /**
      * 根据当前配置，解析应使用的 provider。
      *
-     * <p>解析策略（借鉴 openclaw resolveWebSearchProviderId）：
+     * <p>解析策略：
      * <ol>
      *   <li>如果用户配置了 primary provider 且该 provider 可用 → 选中</li>
      *   <li>否则按 autoDetectOrder 遍历，跳过 keyless，先找有 credential 的</li>

mateclaw-server/src/main/java/vip/mate/tool/search/SearchQuery.java

@@ -1,7 +1,7 @@
 package vip.mate.tool.search;
 
 /**
- * 搜索查询参数封装 — 借鉴 openclaw 的丰富工具参数设计
+ * 搜索查询参数封装
  *
  * @param query     搜索关键词（必须）
  * @param freshness 时间范围过滤：day / week / month / year（可选）

mateclaw-server/src/test/java/vip/mate/plugin/PluginContextImplSearchTest.java

@@ -29,7 +29,7 @@ import static org.mockito.Mockito.mock;
 /**
  * PluginContextImpl#registerSearchProvider: wraps the plugin SPI in a bridge,
  * registers it into SearchProviderRegistry, and records the id on LoadedPlugin
- * so disable/rollback can unregister it (issue #477).
+ * so disable/rollback can unregister it.
  */
 class PluginContextImplSearchTest {
 

mateclaw-server/src/test/java/vip/mate/tool/search/SearchProviderRegistryPluginTest.java

@@ -12,7 +12,7 @@ import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 /**
- * Plugin-provider mutability of {@link SearchProviderRegistry} (issue #477):
+ * Plugin-provider mutability of {@link SearchProviderRegistry}:
  * plugin JARs register/unregister providers at runtime; the registry must merge
  * them with the Spring-injected built-ins and reject id conflicts.
  */