feat(ssa): Complete V11 UI development and frontend-backend integration - Pixel-perfect V11 UI, multi-task support, Word export, input overlay fix, code cleanup. MVP Phase 1 core 95% complete.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/modules/ssa/routes/analysis.routes.ts

@@ -155,8 +155,9 @@ export default async function analysisRoutes(app: FastifyInstance) {
     });
     
     // 返回前端期望的 AnalysisPlan 格式（camelCase）
+    const planId = `plan_${Date.now()}`;
     const mockPlan = {
-      id: `plan_${Date.now()}`,
+      id: planId,
       toolCode: 'ST_T_TEST_IND',
       toolName: '独立样本 T 检验',
       description: `根据您的数据特征和分析需求"${query}"，推荐使用独立样本 T 检验，比较 ${groupVar} 分组下 ${valueVar} 的差异。`,
@@ -171,7 +172,27 @@ export default async function analysisRoutes(app: FastifyInstance) {
       confidence: 0.85
     };
     
-    logger.info('[SSA:Analysis] Plan generated', { sessionId: id, query, toolCode: mockPlan.toolCode, params: mockPlan.parameters });
+    // 保存用户查询消息
+    await prisma.ssaMessage.create({
+      data: {
+        sessionId: id,
+        role: 'user',
+        contentType: 'text',
+        content: { text: query }
+      }
+    });
+    
+    // 保存 plan 消息（支持多任务历史）
+    await prisma.ssaMessage.create({
+      data: {
+        sessionId: id,
+        role: 'assistant',
+        contentType: 'plan',
+        content: { ...mockPlan, query }  // 保存原始查询以便后续关联
+      }
+    });
+    
+    logger.info('[SSA:Analysis] Plan generated and saved', { sessionId: id, planId, query, toolCode: mockPlan.toolCode, params: mockPlan.parameters });
     
     return reply.send(mockPlan);
   });
@@ -265,7 +286,34 @@ export default async function analysisRoutes(app: FastifyInstance) {
         }
       });
       
-      return reply.send(result);
+      // 转换 R 服务返回的 snake_case 为前端期望的 camelCase
+      const transformedResult = {
+        status: result.status,
+        message: result.message,
+        warnings: result.warnings,
+        results: result.results ? {
+          method: result.results.method,
+          statistic: result.results.statistic,
+          df: result.results.df,
+          pValue: result.results.p_value,
+          pValueFmt: result.results.p_value_fmt,
+          confInt: result.results.conf_int,
+          estimate: result.results.estimate,
+          groupStats: result.results.group_stats,
+          effectSize: result.results.effect_size,
+        } : null,
+        plots: result.plots?.map((p: any) => 
+          typeof p === 'string' 
+            ? { type: 'chart', title: '统计图表', imageBase64: p }
+            : p
+        ),
+        traceLog: result.trace_log,
+        reproducibleCode: result.reproducible_code,
+        guardrailResults: result.guardrail_results,
+        executionMs: result.executionMs,
+      };
+      
+      return reply.send(transformedResult);
       
     } catch (error: any) {
       logger.error('[SSA:Analysis] Execute failed', {