style: remove hyphens from compound adjectives in comments and messages

Remove hyphens from compound adjectives such as "logged-in", "one-time", "password-protected", "full-height", "multi-file", and "S3-compatible" in comments, test error messages, and UI labels to improve readability and consistency.

backend/templates/pages/download.html

@@ -111,7 +111,7 @@
                     <small>{{.Size}} · {{if .Failed}}Failed{{else if .Processing}}Processing{{else}}{{.ContentType}}{{end}}</small>
                     {{if .Failed}}<small class="file-error">{{.Error}}</small>{{end}}
                   </span>
-                  <span class="file-type">{{if .Failed}}Failed{{else if .Processing}}Processing{{else}}{{.ContentType}}{{end}}</span>
+                  <span class="file type">{{if .Failed}}Failed{{else if .Processing}}Processing{{else}}{{.ContentType}}{{end}}</span>
                   <span class="file-size">{{.Size}}</span>
                 {{if or .Processing .Failed}}</div>{{else}}</a>{{end}}
                 {{if not $.Data.Locked}}