feat(opencode): Phase 6 - Tauri command extensions for OpenCode

- Add import_opencode_providers_from_live command to provider.rs
- Register new command in lib.rs invoke_handler
- Update commands/mcp.rs: include OpenCode in sync_other_side logic
- Add McpService::import_from_opencode to import_mcp_from_apps
- Implement MCP sync/remove for OpenCode in services/mcp.rs
  - sync_server_to_app_no_config now calls sync_single_server_to_opencode
  - remove_server_from_app now calls remove_server_from_opencode

src-tauri/src/services/mcp.rs

@@ -114,9 +114,7 @@ impl McpService {
                 mcp::sync_single_server_to_gemini(&Default::default(), &server.id, &server.server)?;
             }
             AppType::OpenCode => {
-                // OpenCode MCP sync will be implemented in Phase 4
-                // For now, skip silently
-                log::debug!("OpenCode MCP sync not yet implemented, skipping");
+                mcp::sync_single_server_to_opencode(&Default::default(), &server.id, &server.server)?;
             }
         }
         Ok(())
@@ -141,8 +139,7 @@ impl McpService {
             AppType::Codex => mcp::remove_server_from_codex(id)?,
             AppType::Gemini => mcp::remove_server_from_gemini(id)?,
             AppType::OpenCode => {
-                // OpenCode MCP removal will be implemented in Phase 4
-                log::debug!("OpenCode MCP removal not yet implemented, skipping");
+                mcp::remove_server_from_opencode(id)?;
             }
         }
         Ok(())
@@ -320,4 +317,42 @@ impl McpService {
 
         Ok(new_count)
     }
+
+    /// 从 OpenCode 导入 MCP（v3.9.2+ 新增）
+    pub fn import_from_opencode(state: &AppState) -> Result<usize, AppError> {
+        // 创建临时 MultiAppConfig 用于导入
+        let mut temp_config = crate::app_config::MultiAppConfig::default();
+
+        // 调用原有的导入逻辑（从 mcp/opencode.rs）
+        let count = crate::mcp::import_from_opencode(&mut temp_config)?;
+
+        let mut new_count = 0;
+
+        // 如果有导入的服务器，保存到数据库
+        if count > 0 {
+            if let Some(servers) = &temp_config.mcp.servers {
+                let mut existing = state.db.get_all_mcp_servers()?;
+                for server in servers.values() {
+                    // 已存在：仅启用 OpenCode，不覆盖其他字段（与导入模块语义保持一致）
+                    let to_save = if let Some(existing_server) = existing.get(&server.id) {
+                        let mut merged = existing_server.clone();
+                        merged.apps.opencode = true;
+                        merged
+                    } else {
+                        // 真正的新服务器
+                        new_count += 1;
+                        server.clone()
+                    };
+
+                    state.db.save_mcp_server(&to_save)?;
+                    existing.insert(to_save.id.clone(), to_save.clone());
+
+                    // 同步到对应应用 live 配置
+                    Self::sync_server_to_apps(state, &to_save)?;
+                }
+            }
+        }
+
+        Ok(new_count)
+    }
 }