feat: P1 合盘/星座/问答与测测完整设计包及模拟器取证工具

落地 synastry/star/ask API 与 H5 页面，补齐 cece-frontend-re complete-design 证据文档，并加入 Android 模拟器截图抓取脚本。

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

apps/api/internal/llm/deepseek/client_test.go

@@ -0,0 +1,47 @@
+package deepseek
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/config"
+)
+
+func TestChat_success(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Header.Get("Authorization") != "Bearer test-key" {
+			t.Fatalf("auth header: %s", r.Header.Get("Authorization"))
+		}
+		var req chatRequest
+		_ = json.NewDecoder(r.Body).Decode(&req)
+		if req.Model != "deepseek-chat" {
+			t.Fatalf("model=%s", req.Model)
+		}
+		_ = json.NewEncoder(w).Encode(chatResponse{
+			Choices: []struct {
+				Message Message `json:"message"`
+			}{{Message: Message{Role: "assistant", Content: "你好，我是成长助手"}}},
+		})
+	}))
+	defer srv.Close()
+
+	c := New(config.DeepSeekConfig{
+		APIKey: "test-key", BaseURL: srv.URL, Model: "deepseek-chat", TimeoutSec: 5,
+	})
+	out, err := c.Chat(context.Background(), []Message{{Role: "user", Content: "hi"}})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if out != "你好，我是成长助手" {
+		t.Fatalf("got %q", out)
+	}
+}
+
+func TestEnabled(t *testing.T) {
+	if New(config.DeepSeekConfig{}).Enabled() {
+		t.Fatal("empty key should disable")
+	}
+}