test(cache): 修复CacheConfigTest边界值测试

- 修改 shouldVerifyCacheManager_withMaximumIntegerTtl 为 shouldVerifyCacheManager_withMaximumAllowedTtl
- 使用正确的最大TTL值（10080分钟，7天）而不是 Integer.MAX_VALUE
- 新增 shouldThrowException_whenTtlExceedsMaximum 测试验证边界检查
- 所有1266个测试用例通过
- 覆盖率: 指令81.89%, 行88.48%, 分支51.55%

docs: 添加项目状态报告
- 生成 PROJECT_STATUS_REPORT.md 详细记录项目当前状态
- 包含质量指标、已完成功能、待办事项和技术债务

src/test/java/com/mosquito/project/service/PosterRenderServiceTest.java

@@ -0,0 +1,97 @@
+package com.mosquito.project.service;
+
+import com.mosquito.project.config.PosterConfig;
+import com.mosquito.project.persistence.entity.ShortLinkEntity;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.when;
+
+class PosterRenderServiceTest {
+
+    @BeforeAll
+    static void enableHeadlessMode() {
+        System.setProperty("java.awt.headless", "true");
+    }
+
+    @Test
+    void renderPosterHtml_includesElementsAndShortUrl() {
+        ShortLinkService shortLinkService = Mockito.mock(ShortLinkService.class);
+        ShortLinkEntity shortLink = new ShortLinkEntity();
+        shortLink.setCode("short123");
+        when(shortLinkService.create(anyString())).thenReturn(shortLink);
+
+        PosterConfig posterConfig = buildPosterConfig(buildHtmlElements());
+        PosterRenderService service = new PosterRenderService(posterConfig, shortLinkService);
+
+        String html = service.renderPosterHtml(10L, 20L, "custom");
+
+        assertTrue(html.contains("/r/short123"));
+        assertTrue(html.contains("data=%2Fr%2Fshort123"));
+        assertTrue(html.contains("Hello 10"));
+        assertTrue(html.contains("https://example.com/image.png"));
+        assertTrue(html.contains("立即加入"));
+    }
+
+    @Test
+    void renderPoster_generatesPngBytes() {
+        ShortLinkService shortLinkService = Mockito.mock(ShortLinkService.class);
+        PosterConfig posterConfig = buildPosterConfig(buildImageElements());
+        PosterRenderService service = new PosterRenderService(posterConfig, shortLinkService);
+
+        byte[] bytes = service.renderPoster(11L, 22L, "custom");
+
+        assertTrue(bytes.length > 0);
+    }
+
+    private PosterConfig buildPosterConfig(Map<String, PosterConfig.PosterElement> elements) {
+        PosterConfig posterConfig = new PosterConfig();
+        posterConfig.setDefaultTemplate("default");
+
+        PosterConfig.PosterTemplate template = new PosterConfig.PosterTemplate();
+        template.setWidth(300);
+        template.setHeight(400);
+        template.setBackgroundColor("#ffffff");
+        template.setElements(elements);
+
+        Map<String, PosterConfig.PosterTemplate> templates = new HashMap<>();
+        templates.put("default", template);
+        templates.put("custom", template);
+        posterConfig.setTemplates(templates);
+        return posterConfig;
+    }
+
+    private Map<String, PosterConfig.PosterElement> buildHtmlElements() {
+        Map<String, PosterConfig.PosterElement> elements = new HashMap<>();
+        elements.put("text", element("text", 10, 10, 200, 30, "Hello {{activityId}}"));
+        elements.put("qrcode", element("qrcode", 10, 50, 120, 120, "{{shortUrl}}"));
+        elements.put("image", element("image", 10, 200, 80, 80, "https://example.com/image.png"));
+        elements.put("button", element("button", 10, 300, 120, 40, "立即加入"));
+        return elements;
+    }
+
+    private Map<String, PosterConfig.PosterElement> buildImageElements() {
+        Map<String, PosterConfig.PosterElement> elements = new HashMap<>();
+        elements.put("text", element("text", 10, 10, 200, 30, "Poster {{activityId}}"));
+        elements.put("qrcode", element("qrcode", 10, 60, 120, 120, "{{shortUrl}}"));
+        elements.put("rect", element("rect", 10, 200, 80, 40, ""));
+        return elements;
+    }
+
+    private PosterConfig.PosterElement element(String type, int x, int y, int width, int height, String content) {
+        PosterConfig.PosterElement element = new PosterConfig.PosterElement();
+        element.setType(type);
+        element.setX(x);
+        element.setY(y);
+        element.setWidth(width);
+        element.setHeight(height);
+        element.setContent(content);
+        return element;
+    }
+}