some ai generated code from claude that does not work

assets/css/app.css

@@ -1056,6 +1056,159 @@ html, body {
   .mx-compose-wrapper { display: none; }
 }
 
+/* ── Avatar image ── */
+.mx-avatar-img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  border-radius: inherit;
+  display: block;
+}
+
+/* ── Tweet sub-handle (@username) ── */
+.mx-tweet-subhandle {
+  font-size: 0.78rem;
+  color: var(--mx-muted);
+  font-weight: 400;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  max-width: 120px;
+}
+
+/* ── Profile editor ── */
+.mx-profile-editor {
+  padding: 1.5rem 1.25rem;
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+  max-width: 480px;
+}
+
+.mx-profile-avatar-section {
+  display: flex;
+  flex-direction: column;
+  align-items: flex-start;
+  gap: 0.5rem;
+}
+
+.mx-profile-avatar-wrap {
+  position: relative;
+  width: 80px;
+  height: 80px;
+}
+
+.mx-profile-avatar-img {
+  width: 80px;
+  height: 80px;
+  border-radius: 50%;
+  object-fit: cover;
+  display: block;
+  border: 2px solid var(--mx-border2);
+}
+
+.mx-profile-avatar-placeholder {
+  width: 80px;
+  height: 80px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, var(--mx-accent) 0%, var(--mx-accent2) 100%);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 2rem;
+  font-weight: 700;
+  color: white;
+  user-select: none;
+}
+
+.mx-profile-avatar-edit-btn {
+  position: absolute;
+  bottom: 0;
+  right: 0;
+  width: 26px;
+  height: 26px;
+  border-radius: 50%;
+  background: var(--mx-accent);
+  border: 2px solid var(--mx-bg);
+  color: white;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  transition: background 0.15s;
+}
+.mx-profile-avatar-edit-btn:hover { background: var(--mx-accent2); }
+.mx-profile-avatar-edit-btn:disabled { opacity: 0.6; cursor: not-allowed; }
+
+.mx-profile-stats {
+  display: flex;
+  gap: 1.25rem;
+  font-size: 0.875rem;
+  color: var(--mx-muted);
+}
+.mx-profile-stats strong { color: var(--mx-fg); }
+
+.mx-profile-field {
+  display: flex;
+  flex-direction: column;
+  gap: 0.375rem;
+}
+
+.mx-profile-label {
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: var(--mx-fg2);
+  letter-spacing: 0.04em;
+  text-transform: uppercase;
+}
+
+.mx-profile-input {
+  background: var(--mx-surface);
+  border: 1px solid var(--mx-border2);
+  border-radius: var(--mx-radius-sm);
+  padding: 0.5rem 0.75rem;
+  color: var(--mx-fg);
+  font-family: inherit;
+  font-size: 0.9375rem;
+  width: 100%;
+  transition: border-color 0.15s;
+  outline: none;
+}
+.mx-profile-input:focus { border-color: var(--mx-accent); }
+.mx-profile-input--readonly { color: var(--mx-muted); cursor: not-allowed; }
+
+.mx-profile-input-wrap {
+  display: flex;
+  align-items: center;
+  background: var(--mx-surface);
+  border: 1px solid var(--mx-border2);
+  border-radius: var(--mx-radius-sm);
+  padding: 0 0.75rem;
+  transition: border-color 0.15s;
+}
+.mx-profile-input-wrap:focus-within { border-color: var(--mx-accent); }
+
+.mx-profile-at {
+  color: var(--mx-muted);
+  font-size: 0.9375rem;
+  pointer-events: none;
+  user-select: none;
+}
+
+.mx-profile-input--handle {
+  border: none;
+  border-radius: 0;
+  padding-left: 0.25rem;
+  background: transparent;
+}
+.mx-profile-input--handle:focus { border-color: transparent; }
+
+.mx-profile-hint {
+  font-size: 0.72rem;
+  color: var(--mx-muted);
+  margin-top: 0.125rem;
+}
+
 /* Narrow phones (≤ 640 px): tighten spacing */
 @media (max-width: 640px) {
   .mx-feed  { padding: 0.625rem; gap: 0.5rem; }