Web: fix SSH, SFTP and all other sessions failing over plain http:// (crypto.randomUUID only exists in secure contexts), add a clipboard fallback without HTTPS

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/web/public/web-api.js

@@ -67,8 +67,17 @@
 
   // Kanäle, die im Browser selbst erledigt werden
   const local = {
-    'clipboard:write': (t) => navigator.clipboard.writeText(String(t)),
-    'clipboard:read': () => navigator.clipboard.readText(),
+    // Ohne HTTPS gibt es navigator.clipboard nicht: Kopieren per execCommand, Einfügen dann nur per Strg+V
+    'clipboard:write': (t) => {
+      if (navigator.clipboard && window.isSecureContext) return navigator.clipboard.writeText(String(t));
+      const ta = Object.assign(document.createElement('textarea'), { value: String(t) });
+      ta.style.cssText = 'position:fixed;opacity:0';
+      document.body.append(ta); ta.select(); document.execCommand('copy'); ta.remove();
+    },
+    'clipboard:read': () => {
+      if (navigator.clipboard && window.isSecureContext) return navigator.clipboard.readText();
+      throw new Error('Pasting from the menu needs HTTPS. Use Ctrl+Shift+V or Ctrl+V instead.');
+    },
     'shell:open': (url) => { if (/^https?:\/\//i.test(url)) window.open(url, '_blank', 'noopener'); },
     'vault:export': async () => { downloadText('mrterm-backup.json', JSON.stringify(await remote('vault:exportData', []), null, 2)); return 'mrterm-backup.json'; },
     'vault:import': async () => { const f = await pickFile('.json,application/json'); if (!f) return false; return remote('vault:importData', [JSON.parse(f.content)]); },