feat(model): 按 provider 形状独立适配推理开关 + per-persona 提供商链真接线（裁决 03.4.2/08.4.1/03.4.1 余项）

- 新增 reasoning_shape.go：**每个 provider 形状一个 resolver，只发自己形状的字段**
  · deepseek：thinking{type} + reasoning_effort（依据 DevDocs/reference/deepseek 官方本地副本）
  · vllm：chat_template_kwargs.enable_thinking　· dashscope：顶层 enable_thinking（**只允许显式声明**）
  · openai：仅 reasoning_effort　· anthropic：自己的 thinking{budget_tokens}（未改）
  · 未知 kind → WARN 且一个字段都不发（不许静默失效）
- 形状载体：models.json 组级 `reasoning.kind`（可热更新，未声明则不写该键）+ env `LLM_REASONING_KIND`
- 红线：`effort:none` 在只有布尔开关的形状上翻成**显式关思考**，绝不降成任何强度档
- 03.4.1 余项：`Request.PersonaID` + `RuntimeLLM.ForPersona(pid)` 视图；
  每 persona 协议一条链并消费 `RouteProviderForPersona`；`agent/request.go` 非流式路径同一钩子
- **生产装配（主会话补）**：默认 agent 与 personaAgentPool 都改用 `ForPersona(pid)` 视图——
  否则角色级模型/提供商路由在生产里永不被选中（形同虚设）
- 复核：build/vet 绿 + model/agent/config/cmd 包测试绿；5 条变异反证先红后还原
  （其中一条「红但没钉住」已改用例：通道读取加 2s 超时，避免整包 panic 掩盖信号）
- 未落：DashScope 的 auto 推断（缺官方依据，只允许显式声明）；Qwen `/think` 前导消息
  （design/01 §2.1 与 design/11 §3 口径冲突，停手报告）

internal/runtime/model/anthropic.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/config/runtimeconfig"
 )
 
 // Anthropic Messages (/v1/messages) wire protocol constants.
@@ -163,6 +164,13 @@ func NewAnthropicChat(cfg config.LLMConfig, opts ...AnthropicOption) *AnthropicC
 		},
 		log: discardLogger("runtime/model/anthropic"),
 	}
+	if kind := strings.TrimSpace(cfg.ReasoningKind); kind != "" && kind != runtimeconfig.ReasoningKindAuto {
+		// The anthropic protocol defines its own thinking shape, so an
+		// openai-shape declaration is inert here. Report it rather than letting a
+		// configured option be silently ineffective (裁决 03.4.2: 禁止静默无效).
+		a.log.Warn("reasoning.kind ignored: the anthropic protocol defines its own thinking shape",
+			"provider", ProviderAnthropic, "field", "reasoning.kind", "kind", kind)
+	}
 	for _, o := range opts {
 		o(a)
 	}
@@ -311,7 +319,7 @@ func (a *AnthropicChatAdapter) buildRequest(req Request, stream bool) ([]byte, e
 		// provider actually applies. Strength goes through output_config.effort
 		// instead (design/04 §3.2 fact 6).
 		thinking, output = anthropicDeepSeekReasoning(a.log, req.Model, req.Thinking, req.ReasoningEffort)
-		reportForcedToolChoiceWithThinking(a.log, req.Model, req.ToolChoice, anthropicThinkingOn(thinking))
+		reportForcedToolChoiceWithThinking(a.log, string(vendorDeepSeek), req.Model, req.ToolChoice, anthropicThinkingOn(thinking))
 	} else {
 		// Extended thinking shares max_tokens with the visible answer, so on the
 		// Anthropic endpoint the budget is resolved together with the limit it