Symbolleiste professioneller gestaltet: echte SVG-Icons statt Unicode/Emoji

Neue ToolbarIcon.vue (hand-gezeichnete Strich-Icons: Einstellungen, Rückgängig/
Wiederholen, Tabelle/Diagramm/Text einfügen, Benannte Bereiche) ersetzt die
bisherigen ⚙ ↶ ↷ ▦ ▤ ¶ 🏷 Glyphen. Buttons sind jetzt in dezente,
segmentierte Gruppen ("Pills") statt einzeln umrandeter Kästchen mit dünnen
Trennstrichen gefasst, mit Ghost-Stil in Ruhe und Hover-/Aktiv-Zuständen.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/components/ToolbarIcon.vue

@@ -0,0 +1,88 @@
+<script setup lang="ts">
+/**
+ * Small hand-drawn line-icon set for the toolbar (no icon library/font —
+ * consistent with this project's "nothing off the shelf" approach). One
+ * shared <svg> shell (24x24, stroke-only) with a name-keyed set of shapes,
+ * since every icon needs the exact same viewBox/stroke setup and only the
+ * inner geometry differs.
+ */
+export type ToolbarIconName =
+  | 'settings'
+  | 'undo'
+  | 'redo'
+  | 'table'
+  | 'chart'
+  | 'text'
+  | 'tag';
+
+defineProps<{ name: ToolbarIconName }>();
+</script>
+
+<template>
+  <svg
+    class="ti"
+    viewBox="0 0 24 24"
+    fill="none"
+    stroke="currentColor"
+    stroke-width="1.75"
+    stroke-linecap="round"
+    stroke-linejoin="round"
+    aria-hidden="true"
+  >
+    <template v-if="name === 'settings'">
+      <line x1="3" y1="6" x2="21" y2="6" />
+      <circle cx="9" cy="6" r="2" fill="currentColor" />
+      <line x1="3" y1="12" x2="21" y2="12" />
+      <circle cx="15" cy="12" r="2" fill="currentColor" />
+      <line x1="3" y1="18" x2="21" y2="18" />
+      <circle cx="7" cy="18" r="2" fill="currentColor" />
+    </template>
+
+    <template v-else-if="name === 'undo'">
+      <path d="M7 10 H15 a4 4 0 0 1 0 8 h-3" />
+      <polyline points="7 10 11 6" />
+      <polyline points="7 10 11 14" />
+    </template>
+
+    <template v-else-if="name === 'redo'">
+      <path d="M17 10 H9 a4 4 0 0 0 0 8 h3" />
+      <polyline points="17 10 13 6" />
+      <polyline points="17 10 13 14" />
+    </template>
+
+    <template v-else-if="name === 'table'">
+      <rect x="3" y="4" width="18" height="16" rx="2" />
+      <line x1="3" y1="10" x2="21" y2="10" />
+      <line x1="3" y1="16" x2="21" y2="16" />
+      <line x1="9" y1="4" x2="9" y2="20" />
+      <line x1="15" y1="4" x2="15" y2="20" />
+    </template>
+
+    <template v-else-if="name === 'chart'">
+      <line x1="4" y1="20" x2="20" y2="20" />
+      <rect x="6" y="13" width="3" height="7" />
+      <rect x="11" y="9" width="3" height="11" />
+      <rect x="16" y="5" width="3" height="15" />
+    </template>
+
+    <template v-else-if="name === 'text'">
+      <rect x="4" y="4" width="16" height="16" rx="2" />
+      <line x1="7" y1="9" x2="17" y2="9" />
+      <line x1="7" y1="13" x2="17" y2="13" />
+      <line x1="7" y1="17" x2="13" y2="17" />
+    </template>
+
+    <template v-else-if="name === 'tag'">
+      <polygon points="4,5 14,5 20,11 14,17 4,17" />
+      <circle cx="9" cy="9" r="1.6" fill="currentColor" />
+    </template>
+  </svg>
+</template>
+
+<style scoped>
+.ti {
+  width: 17px;
+  height: 17px;
+  display: block;
+}
+</style>