website: fix nine review findings (generator coverage, loader facts, mode semantics)

Generator (all four structural gaps):
- harness service pages now render public properties/accessors, not just
  methods (ctx.codeRuntime.language/isolation were missing);
- the class page merges the same-named interface half, so ctx.root/baseUrl/
  events/logger/reflect/registry appear on Context (vendor root JSDoc gains
  prose alongside @experimental);
- Pick<…> heritage on a Context merge resolves to the picked class members,
  giving ctx.effect a documented signature on the Fiber page;
- {@link} tags normalize to code spans; merge sections get their own h2 so
  reflect members no longer nest under 'Static members'.

verify-website-yaml: reject the unloadable 'group:' pseudo-name (tree.import
only special-cases 'cordis:'; no builtin is registered here) and recurse into
@cordisjs/plugin-group nested entry lists instead.

Prose corrected against loader/cordis source: service.md isolation example
uses the real group plugin + group: true + the required isolate map;
config.md documents concurrent entry startup (Promise.all; order via inject)
and the real hmr defaults (root ['.'], base/ignored/debounce); events.md
fixes emit (synchronous, not parallel), bail (null/false also delegate), and
serial (stops at the first bail value).

website/zh-CN/develop/framework/service.md

@@ -132,11 +132,14 @@ export function apply(ctx: Context) {
 
 ## 服务隔离
 
-`cordis.yml` 支持服务隔离——同一个服务可以有多个实例，不同插件组看到不同实例：
+`cordis.yml` 支持服务隔离——同一个服务可以有多个实例，不同插件组看到不同实例。用 `@cordisjs/plugin-group` 建组（`group: true` 标记组条目），并在组上声明 `isolate`，把该服务隔离进组内作用域：
 
 ```yaml
 - id: group-a
-  name: 'group:'
+  name: '@cordisjs/plugin-group'
+  group: true
+  isolate:
+    bash: true
   config:
     - name: '@deepseek-ai/dsh-bash-local'
       config:
@@ -144,7 +147,10 @@ export function apply(ctx: Context) {
     - name: './src/plugin-a.ts'
 
 - id: group-b
-  name: 'group:'
+  name: '@cordisjs/plugin-group'
+  group: true
+  isolate:
+    bash: true
   config:
     - name: '@deepseek-ai/dsh-bash-local'
       config:
@@ -152,7 +158,7 @@ export function apply(ctx: Context) {
     - name: './src/plugin-b.ts'
 ```
 
-`plugin-a` 和 `plugin-b` 各自看到自己组内的 bash 实例，互不影响。
+`plugin-a` 和 `plugin-b` 各自看到自己组内的 bash 实例，互不影响。`isolate: { bash: true }` 是必需的：不隔离的话，两个组在同一作用域注册同名服务，第二个会直接报重复注册错误。
 
 ## Harness 内置服务一览