v3: added password change/reset feature

src/App.css

@@ -2021,6 +2021,51 @@ body.has-player .fab-new {
   margin: 0;
 }
 
+.auth-link-btn {
+  background: none;
+  border: none;
+  padding: 0;
+  cursor: pointer;
+  color: var(--color-accent);
+  font-size: inherit;
+  font-family: inherit;
+  text-decoration: underline;
+  text-underline-offset: 2px;
+}
+
+.auth-link-btn:hover {
+  opacity: 0.8;
+}
+
+.auth-reset-panel {
+  border-top: 1px solid var(--color-border-subtle);
+  padding-top: 1rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.auth-reset-form {
+  margin: 0;
+}
+
+.auth-reset-sent {
+  font-size: 0.9rem;
+  text-align: center;
+  margin: 0;
+  opacity: 0.85;
+}
+
+.auth-field-hint {
+  display: block;
+  font-size: 0.8rem;
+  margin-top: 0.25rem;
+}
+
+.auth-field-hint--error {
+  color: var(--color-error, #e53e3e);
+}
+
 /* ── Form pages (DumpCreate / DumpEdit) ── */
 @keyframes page-enter {
   from {