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/static/css/16-retro.css

@@ -1,16 +1,16 @@
 /*
- * "retro" theme flourishes — modelled on danlegt.com.
+ * "retro" theme flourishes. Modelled on danlegt.com.
  *
  * Windows 98 chrome over a black pixel-star desktop, PixeloidSans pixel font,
  * crisp (non-antialiased, pixelated) rendering. Scoped entirely to
  * :root[data-theme="retro"] so it never touches the other themes.
  *
- * CSP-safe: external stylesheet + self-hosted fonts only (font-src 'self'),
+ * CSP-safe: external stylesheet + self hosted fonts only (font-src 'self'),
  * no inline styles, no remote assets. The starfield is pure CSS so we don't
  * depend on img-src for a background gif.
  */
 
-/* Self-hosted pixel fonts (mirrored locally — GGBotNet PixeloidSans is free,
+/* self hosted pixel fonts (mirrored locally. GGBotNet PixeloidSans is free,
    PixelOperator is CC0). ------------------------------------------------- */
 @font-face {
   font-family: "PixeloidSans";
@@ -50,7 +50,7 @@
   image-rendering: pixelated;
 }
 
-/* Square everything — Win98 had no rounded corners. */
+/* Square everything. Win98 had no rounded corners. */
 :root[data-theme="retro"] *,
 :root[data-theme="retro"] *::before,
 :root[data-theme="retro"] *::after {
@@ -736,7 +736,7 @@
   align-self: start;
 }
 
-:root[data-theme="retro"] .file-type,
+:root[data-theme="retro"] .file type,
 :root[data-theme="retro"] .file-size,
 :root[data-theme="retro"] .file-main small {
   color: inherit;