fix: FilePreview fileType case + Tailwind v4 gradient transparent bug

- FilePreview.vue: add normalizedFileType computed to handle backend
  returning uppercase HTML/MD/PPTX (fixes preview/download buttons)
- FilePreview.vue: bg-gradient-to-r from-orange-500 -> bg-orange-500
  (Tailwind v4 gradient + CSS variable = transparent)
- ReportCard.vue: bg-gradient-to-r -> bg-orange-600 for selected state
- Add .opencode/, node_modules/, dist/ to .gitignore
- Initial git setup for publish project

src/main/java/com/reportdist/dto/ProjectRequest.java

@@ -0,0 +1,29 @@
+package com.reportdist.dto;
+
+import jakarta.validation.constraints.NotBlank;
+
+public class ProjectRequest {
+
+    @NotBlank(message = "Project name is required")
+    private String name;
+
+    private String description;
+
+    private String coverImage;
+
+    public ProjectRequest() {}
+
+    public ProjectRequest(String name, String description) {
+        this.name = name;
+        this.description = description;
+    }
+
+    public String getName() { return name; }
+    public void setName(String name) { this.name = name; }
+
+    public String getDescription() { return description; }
+    public void setDescription(String description) { this.description = description; }
+
+    public String getCoverImage() { return coverImage; }
+    public void setCoverImage(String coverImage) { this.coverImage = coverImage; }
+}