// -----------------------------
// Projektübersicht — Icon-System
// -----------------------------
// Zentrale Bibliothek von Inline-SVG-Icons (Line-Icons, 1.75px Stroke,
// currentColor -> erbt automatisch die Textfarbe inkl. Dark Mode, keine
// eigene Farbdefinition nötig). Ersetzt alle bisherigen Emoji-Icons in der
// App. Wird als globale Funktion `icon(name, extraClass)` bereitgestellt,
// geladen früh (nach js/utils.js, vor js/ui.js und allen Renderern, die sie
// nutzen). Rückgabe: HTML-String eines <span class="icon ..."> mit dem SVG
// darin, oder leerer String bei unbekanntem Namen.
const ICONS = {
  menu: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"><line x1="4" y1="7" x2="20" y2="7"/><line x1="4" y1="12" x2="20" y2="12"/><line x1="4" y1="17" x2="20" y2="17"/></svg>',
  close: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"><line x1="6" y1="6" x2="18" y2="18"/><line x1="18" y1="6" x2="6" y2="18"/></svg>',
  sun: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"><circle cx="12" cy="12" r="4"/><line x1="12" y1="2" x2="12" y2="4.5"/><line x1="12" y1="19.5" x2="12" y2="22"/><line x1="2" y1="12" x2="4.5" y2="12"/><line x1="19.5" y1="12" x2="22" y2="12"/><line x1="4.9" y1="4.9" x2="6.6" y2="6.6"/><line x1="17.4" y1="17.4" x2="19.1" y2="19.1"/><line x1="4.9" y1="19.1" x2="6.6" y2="17.4"/><line x1="17.4" y1="6.6" x2="19.1" y2="4.9"/></svg>',
  moon: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M20.5 14.5A8.5 8.5 0 1 1 9.5 3.5a7 7 0 0 0 11 11Z"/></svg>',
  chevronLeft: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><polyline points="15 5 8 12 15 19"/></svg>',
  chevronRight: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><polyline points="9 5 16 12 9 19"/></svg>',
  chevronDown: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><polyline points="5 9 12 16 19 9"/></svg>',
  grip: '<svg viewBox="0 0 24 24" fill="currentColor" stroke="none"><circle cx="9" cy="6" r="1.4"/><circle cx="9" cy="12" r="1.4"/><circle cx="9" cy="18" r="1.4"/><circle cx="15" cy="6" r="1.4"/><circle cx="15" cy="12" r="1.4"/><circle cx="15" cy="18" r="1.4"/></svg>',
  flag: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><line x1="5" y1="3" x2="5" y2="21"/><path d="M5 4h11l-3 4.5L16 13H5"/></svg>',
  checklist: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="4" width="7" height="7" rx="1.5"/><path d="m4.5 7.5 1.3 1.3L8.5 6"/><line x1="13" y1="6" x2="21" y2="6"/><rect x="3" y="14" width="7" height="7" rx="1.5"/><path d="m4.5 17.5 1.3 1.3 2.7-2.8"/><line x1="13" y1="16" x2="21" y2="16"/></svg>',
  board: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2.5"/><line x1="9" y1="3" x2="9" y2="21"/><line x1="15" y1="3" x2="15" y2="21"/></svg>',
  chart: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><line x1="5" y1="21" x2="5" y2="10"/><line x1="12" y1="21" x2="12" y2="5"/><line x1="19" y1="21" x2="19" y2="14"/><line x1="3" y1="21" x2="21" y2="21"/></svg>',
  folder: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M3 6.5A1.5 1.5 0 0 1 4.5 5H9l2 2.5h8.5A1.5 1.5 0 0 1 21 9v8.5A1.5 1.5 0 0 1 19.5 19h-15A1.5 1.5 0 0 1 3 17.5Z"/></svg>',
  people: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><circle cx="9" cy="8" r="3"/><path d="M3.5 19c0-3 2.5-5 5.5-5s5.5 2 5.5 5"/><circle cx="17.5" cy="9" r="2.3"/><path d="M15.8 13.2c2.4.2 4.2 2 4.2 4.6"/></svg>',
  plus: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>',
  copy: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="8" y="8" width="13" height="13" rx="2"/><path d="M16 8V5.5A1.5 1.5 0 0 0 14.5 4H5.5A1.5 1.5 0 0 0 4 5.5v9A1.5 1.5 0 0 0 5.5 16H8"/></svg>',
  trash: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><line x1="4" y1="7" x2="20" y2="7"/><path d="M6 7V5a2 2 0 0 1 2-2h8a2 2 0 0 1 2 2v2"/><path d="M18.5 7 17.7 19.5A2 2 0 0 1 15.7 21H8.3a2 2 0 0 1-2-1.9L5.5 7"/><line x1="10" y1="11" x2="10" y2="17"/><line x1="14" y1="11" x2="14" y2="17"/></svg>',
  fileText: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M6.5 3.5h7l4 4v12a1 1 0 0 1-1 1h-10a1 1 0 0 1-1-1v-15a1 1 0 0 1 1-1Z"/><path d="M13.5 3.5V7a1 1 0 0 0 1 1h4"/><line x1="8.5" y1="12.5" x2="15.5" y2="12.5"/><line x1="8.5" y1="16" x2="13.5" y2="16"/></svg>',
  play: '<svg viewBox="0 0 24 24" fill="currentColor" stroke="none"><path d="M7.5 5.2a1 1 0 0 1 1.53-.85l10 6.8a1 1 0 0 1 0 1.7l-10 6.8A1 1 0 0 1 7.5 18.8Z"/></svg>',
  table: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="3.5" y="4.5" width="17" height="15" rx="1.5"/><line x1="3.5" y1="9.5" x2="20.5" y2="9.5"/><line x1="3.5" y1="14.5" x2="20.5" y2="14.5"/><line x1="9.5" y1="4.5" x2="9.5" y2="19.5"/></svg>',
  download: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M12 3.5v11"/><path d="m7.5 10.5 4.5 4.5 4.5-4.5"/><path d="M4.5 17.5v2a1 1 0 0 0 1 1h13a1 1 0 0 0 1-1v-2"/></svg>',
  upload: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M12 15.5v-11"/><path d="m7.5 8.5 4.5-4.5 4.5 4.5"/><path d="M4.5 17.5v2a1 1 0 0 0 1 1h13a1 1 0 0 0 1-1v-2"/></svg>',
  user: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="8.5" r="3.5"/><path d="M4.5 20c0-4 3.5-6.5 7.5-6.5s7.5 2.5 7.5 6.5"/></svg>',
  logout: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M9 21H5.5A1.5 1.5 0 0 1 4 19.5v-15A1.5 1.5 0 0 1 5.5 3H9"/><path d="M16 17l5-5-5-5"/><line x1="21" y1="12" x2="9" y2="12"/></svg>',
  settings: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="3.2"/><path d="M12 3.5v2.4M12 18.1v2.4M20.5 12h-2.4M5.9 12H3.5M17.7 6.3l-1.7 1.7M8 15.7l-1.7 1.7M17.7 17.7 16 16M8 8 6.3 6.3"/></svg>',
  shield: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M12 3.5 5.5 6v5.3c0 4.4 2.9 7.4 6.5 8.7 3.6-1.3 6.5-4.3 6.5-8.7V6Z"/><path d="m9 12 2.1 2.1L15.5 9.5"/></svg>',
  mail: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><rect x="3.5" y="5.5" width="17" height="13" rx="2"/><path d="m4 6.5 8 6.5 8-6.5"/></svg>',
  warning: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.9" stroke-linecap="round" stroke-linejoin="round"><path d="M12 4.5 21 19.5H3Z"/><line x1="12" y1="10" x2="12" y2="14.2"/><circle cx="12" cy="16.9" r=".7" fill="currentColor"/></svg>',
  history: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.75" stroke-linecap="round" stroke-linejoin="round"><path d="M4 12a8 8 0 1 0 2.5-5.8"/><polyline points="4 4 4 8.5 8.5 8.5"/><polyline points="12 7.5 12 12.4 15.5 14.3"/></svg>',
};

// icon: liefert das benannte Icon als <span class="icon">-Wrapper (Größe wird
// per CSS über `.icon svg { width/height: 1em; }` gesteuert, siehe
// styles.css) — dadurch skaliert das Icon automatisch mit font-size wie ein
// Zeichen. `extraClass` (optional) wird zusätzlich auf den <span> gesetzt.
function icon(name, extraClass){
  const svg = ICONS[name];
  if(!svg) return '';
  return `<span class="icon${extraClass ? ' ' + extraClass : ''}">${svg}</span>`;
}