feat(ai): AI 健康管家 V2 基础设施 — 功能开关 + 角色沙箱准备 + 体征页 AI 趋势分析

- 迁移 000153: 新增 ai_feature_flags / ai_usage_daily / ai_suggestion_feedback 三张表,
  ai_tenant_configs 增加 billing_enabled 列, seed 12 个功能开关 + 2 个管理权限码
- 新增 FeatureFlagService: 5 分钟缓存 + DB 回退 + 即时更新
- VitalSignsTab 添加 AI 趋势分析按钮 (SSE 流式)
- 新增 3 个 Entity (ai_feature_flags / ai_usage_daily / ai_suggestion_feedback)
- AiState 扩展 feature_flags 字段
- 设计规格 + 讨论记录文档

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

crates/erp-ai/src/service/analysis.rs

@@ -13,11 +13,11 @@ use crate::entity::ai_analysis;
 use crate::error::{AiError, AiResult};
 use crate::knowledge::KnowledgeSource;
 use crate::prompt::PromptRenderer;
-use crate::provider::AiProvider;
+use crate::provider::registry::ProviderRegistry;
 use crate::sanitization::SanitizationService;
 
 pub struct AnalysisService {
-    pub provider: Box<dyn AiProvider>,
+    pub provider_registry: std::sync::Arc<ProviderRegistry>,
     pub sanitizer: SanitizationService,
     pub renderer: PromptRenderer,
     pub db: sea_orm::DatabaseConnection,
@@ -25,9 +25,12 @@ pub struct AnalysisService {
 }
 
 impl AnalysisService {
-    pub fn new(provider: Box<dyn AiProvider>, db: sea_orm::DatabaseConnection) -> Self {
+    pub fn new(
+        provider_registry: std::sync::Arc<ProviderRegistry>,
+        db: sea_orm::DatabaseConnection,
+    ) -> Self {
         Self {
-            provider,
+            provider_registry,
             sanitizer: SanitizationService::new(),
             renderer: PromptRenderer::new(),
             db,
@@ -62,7 +65,20 @@ impl AnalysisService {
     )> {
         let analysis_id = Uuid::now_v7();
         let input_hash = self.compute_hash(&sanitized_data);
-        let provider_name = self.provider.name().to_string();
+
+        // 从 config_resolver 获取 default_provider，然后从 registry 解析
+        let default_provider_name = crate::config_resolver::load_ai_config(tenant_id, &self.db)
+            .await
+            .default_provider;
+        let resolved = self
+            .provider_registry
+            .resolve(&default_provider_name)
+            .await
+            .map_err(|e| {
+                tracing::error!(error = %e, "无法解析 AI Provider");
+                AiError::ProviderUnavailable(default_provider_name.clone())
+            })?;
+        let provider_name = resolved.provider_name().to_string();
 
         // 0. 缓存命中检查（相同输入 + prompt 版本 → 复用已有结果）
         if let Some(cached) = self.find_cached(tenant_id, &input_hash, 1).await? {
@@ -133,7 +149,7 @@ impl AnalysisService {
             temperature,
             max_tokens,
         };
-        let stream = self.provider.stream_generate(req).await?;
+        let stream = resolved.provider().stream_generate(req).await?;
 
         Ok((stream, analysis_id, provider_name))
     }