feat: add license popup with terms and conditions, including UI integration and translations

js/i18n.js

@@ -124,6 +124,15 @@ export const TRANSLATIONS = {
     'progress.done':                 'Done!',
     'progress.processing':           'Processing\u2026',
 
+    // License popup
+    'license.btn':    'License & Terms',
+    'license.title':  'License & Terms',
+    'license.item1':  'This tool is <strong>open-source</strong> \u2014 <a href="https://github.com/CNCKitchen/stlTexturizer" target="_blank" rel="noopener">view &amp; contribute on GitHub</a>.',
+    'license.item2':  'Free to use for any purpose, including <strong>commercial work</strong> (e.g., texturing STLs for clients or products).',
+    'license.item3':  'Attribution is <strong>appreciated</strong> but <strong>not required</strong> when using this tool as-is.',
+    'license.item4':  'You may <strong>not</strong> sell or commercially redistribute this tool itself.',
+    'license.item5':  'Forks or derivative works must credit <strong>CNC Kitchen</strong> by name and link to <a href="https://cnckitchen.store" target="_blank" rel="noopener">cnckitchen.store</a>.',
+
     // Sponsor modal
     'sponsor.title':           'Thanks for using CNC Kitchen STL Texturizer!',
     'sponsor.body':            'This tool is provided <strong>completely free</strong> by CNC Kitchen.<br>While your STL is being processed, why not check out the store that helps us keep making cool stuff for you?',
@@ -262,6 +271,15 @@ export const TRANSLATIONS = {
     'progress.done':                 'Fertig!',
     'progress.processing':           'Verarbeitung\u2026',
 
+    // License popup
+    'license.btn':    'Lizenz & Nutzung',
+    'license.title':  'Lizenz & Nutzungsbedingungen',
+    'license.item1':  'Dieses Tool ist <strong>Open Source</strong> \u2014 <a href="https://github.com/CNCKitchen/stlTexturizer" target="_blank" rel="noopener">auf GitHub ansehen &amp; beitragen</a>.',
+    'license.item2':  'Kostenlos nutzbar f\u00fcr jeden Zweck, auch f\u00fcr <strong>kommerzielle Arbeit</strong> (z.B. Texturierung von STLs f\u00fcr Kunden oder Produkte).',
+    'license.item3':  'Namensnennung wird <strong>gesch\u00e4tzt</strong>, ist aber bei der Nutzung dieses Tools <strong>nicht erforderlich</strong>.',
+    'license.item4':  'Das Tool selbst darf <strong>nicht</strong> verkauft oder kommerziell weitervertrieben werden.',
+    'license.item5':  'Forks oder abgeleitete Werke m\u00fcssen <strong>CNC Kitchen</strong> namentlich nennen und auf <a href="https://cnckitchen.store" target="_blank" rel="noopener">cnckitchen.store</a> verlinken.',
+
     // Sponsor modal
     'sponsor.title':           'Danke f\u00fcr die Nutzung des CNC Kitchen STL Texturizers!',
     'sponsor.body':            'Dieses Tool wird von CNC Kitchen <strong>komplett kostenlos</strong> bereitgestellt.<br>W\u00e4hrend dein STL verarbeitet wird, schau doch mal im Shop vorbei, der uns hilft, coole Sachen f\u00fcr dich zu machen!',

js/main.js

@@ -131,6 +131,11 @@ const exclModeIncludeBtn  = document.getElementById('excl-mode-include');
 const exclSectionHeading  = document.getElementById('excl-section-heading');
 const exclHint            = document.getElementById('excl-hint');
 
+// ── License panel DOM refs ────────────────────────────────────────────────────
+const licenseLink    = document.getElementById('license-link');
+const licenseOverlay = document.getElementById('license-overlay');
+const licenseClose   = document.getElementById('license-close');
+
 // ── Scale slider log helpers ──────────────────────────────────────────────────
 // Slider stores 0–1000; actual scale spans 0.05–10 on a log axis.
 // Middle position 500 → scale ~0.71 (log midpoint between 0.05 and 10).
@@ -332,6 +337,13 @@ function wireEvents() {
     toggleDisplacementPreview(dispPreviewToggle.checked);
   });
 
+  // ── License ──
+  licenseLink.addEventListener('click', () => licenseOverlay.classList.remove('hidden'));
+  licenseClose.addEventListener('click', () => licenseOverlay.classList.add('hidden'));
+  licenseOverlay.addEventListener('click', (e) => {
+    if (e.target === licenseOverlay) licenseOverlay.classList.add('hidden');
+  });
+
   // ── Export ──
   exportBtn.addEventListener('click', () => {
     if (sessionStorage.getItem('stlt-no-sponsor') === '1') {
@@ -469,8 +481,9 @@ function wireEvents() {
   });
 
   document.addEventListener('keydown', (e) => {
-    if (e.key === 'Escape' && exclusionTool) {
-      setExclusionTool(null);
+    if (e.key === 'Escape') {
+      if (exclusionTool) setExclusionTool(null);
+      licenseOverlay.classList.add('hidden');
     }
   });
 }