refactor(css): global.css (871 Zeilen Monolith) in 15 Dateien aufgeteilt

Nach Zuständigkeit getrennt (tokens/base/layout/cards/forms/badges/theme-
toggle/command-palette/alert/utilities/scanner/table/split-layout/akte-grid/
responsive) unter frontend/src/styles/global/, größte Datei jetzt 135 statt
871 Zeilen. tailwind.css importiert alle in ursprünglicher Reihenfolge im
selben Layer (global-css) - Cascade-Layer-Reihenfolge unverändert, im
gebauten CSS verifiziert.

Dabei toten Code entfernt: .badge-ready/-limited/-not-ready/-unknown und
.card-grid/.stat-number (Reste von vor der Tailwind-Migration, nirgends
mehr im Code referenziert).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CVgbozhYmuEhiEJHffRXCV

frontend/src/styles/global/forms.css

@@ -0,0 +1,102 @@
+/* -- Forms ------------------------------------------------------------ */
+
+.field {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+  margin-bottom: 1rem;
+}
+
+.field label {
+  font-size: 0.88rem;
+  color: var(--color-text-muted);
+  font-weight: 600;
+}
+
+.input:not([type="checkbox"]):not([type="radio"]),
+select.input,
+textarea.input {
+  width: 100%;
+  font-size: 0.98rem;
+  padding: 0.6rem 0.75rem;
+  min-height: 44px;
+  border: 1px solid var(--color-border-strong);
+  border-radius: var(--radius-sm);
+  background: var(--color-surface);
+  color: var(--color-text);
+  font-family: inherit;
+  transition: border-color 0.15s ease, box-shadow 0.15s ease;
+}
+
+.input:focus,
+select.input:focus {
+  outline: none;
+  border-color: var(--color-primary);
+  box-shadow: 0 0 0 3px var(--color-primary-soft);
+}
+
+.input-search {
+  font-size: 1.02rem;
+  padding: 0.8rem 1rem;
+}
+
+/* -- Buttons ------------------------------------------------------------ */
+
+.btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.4rem;
+  font-size: 0.95rem;
+  font-weight: 600;
+  padding: 0.6rem 1.05rem;
+  /* Mindestens 44x44px Touch-Ziel (WCAG 2.5.5) - im Feld/Lager oft mit
+     Handschuhen bedient. */
+  min-height: 44px;
+  border-radius: var(--radius-sm);
+  border: 1px solid transparent;
+  cursor: pointer;
+  transition: background-color 0.15s ease, border-color 0.15s ease, opacity 0.15s ease, box-shadow 0.15s ease;
+  font-family: inherit;
+}
+
+.btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.btn-primary {
+  background: var(--color-primary);
+  color: #fff;
+  box-shadow: var(--shadow-sm);
+}
+
+.btn-primary:hover:not(:disabled) {
+  background: var(--color-primary-hover);
+}
+
+.btn-secondary {
+  background: var(--color-surface);
+  color: var(--color-text);
+  border-color: var(--color-border-strong);
+}
+
+.btn-secondary:hover:not(:disabled) {
+  background: var(--color-surface-sunken);
+  border-color: var(--color-text-muted);
+}
+
+.btn-danger {
+  background: var(--color-surface);
+  color: var(--color-danger);
+  border-color: var(--color-danger);
+}
+
+.btn-danger:hover:not(:disabled) {
+  background: var(--color-danger-bg);
+}
+
+.btn-block {
+  width: 100%;
+}
+