feat(compute): 新增 Claude Opus 5 + 补齐 Claude 系列 effort 档位，presetDataVersion → 85 (#71)

Opus 5 是 Anthropic Opus 系列当前旗舰（1M 上下文 / 128K 输出 / $5·$25 per MTok，
与 Opus 4.8 同价），此前 config-center 完全缺失，用户在模型选择器里看不到它。

变更：
- compute/providers/anthropic.json：新增 claude-opus-5（排在 fable-5 之后、
  opus-4-8 之前）；serverSideWebSearch.fallbackPriority 顺延重排
- compute/providers/anthropic-claude.json：Claude 订阅 provider 同步新增 claude-opus-5
- compute/model-specs/anthropic.json：补 claude-opus-5 与 claude-sonnet-5 规格
  （sonnet-5 此前只有 provider 条目、没有规格）
- 补 extra.reasoning.supportedEfforts：客户端 parseReasoningEffortConfig 只读
  extra.reasoning，原有的顶层 extra.defaultEffort 不被消费，导致 Claude 模型的
  effort 档位在 UI 上始终不可选。按各模型实际支持声明档位（sonnet-4-6 无 xhigh）
- __tests__/validate.test.mjs：WebSearch 允许名单登记 claude-opus-5
- manifest.json：presetDataVersion 84 → 85

compute/model-specs/anthropic.json

@@ -15,6 +15,20 @@
         "description": "Anthropic 最强模型，基于 Mythos 架构，支持自主知识工作"
       }
     },
+    {
+      "id": "claude-opus-5",
+      "displayName": "Claude Opus 5",
+      "family": "claude-opus",
+      "match": { "patterns": ["claude-opus-5*"] },
+      "spec": {
+        "contextWindow": 1000000,
+        "maxOutputTokens": 128000,
+        "capabilities": ["chat", "reasoning", "code", "vision", "tool_use", "long_context"],
+        "serviceType": ["chat"],
+        "supportsReasoning": true,
+        "description": "Claude Opus 5，Anthropic Opus 系列当前旗舰；思考默认开启，effort 支持到 max"
+      }
+    },
     {
       "id": "claude-opus-4-8",
       "displayName": "Claude Opus 4.8",
@@ -44,6 +58,20 @@
         "description": "Anthropic 当前最强通用模型，适合复杂推理和智能体编码任务"
       }
     },
+    {
+      "id": "claude-sonnet-5",
+      "displayName": "Claude Sonnet 5",
+      "family": "claude-sonnet",
+      "match": { "patterns": ["claude-sonnet-5*"] },
+      "spec": {
+        "contextWindow": 1000000,
+        "maxOutputTokens": 128000,
+        "capabilities": ["chat", "reasoning", "code", "vision", "tool_use", "computer_use", "long_context"],
+        "serviceType": ["chat"],
+        "supportsReasoning": true,
+        "description": "Claude Sonnet 5，速度与智能平衡；思考默认开启，effort 支持到 max"
+      }
+    },
     {
       "id": "claude-sonnet-4-6",
       "displayName": "Claude Sonnet 4.6",