Add My Documents panel to workbench + user-docs API

- api/user-docs.php: GET/DELETE shared dbn_user_docs table (SSO users only)
  connects to dobetternorge DB via DBN_DB_* env vars
- workbench.php: My Documents panel (section 05) for SSO/free-tier users;
  shows docs uploaded from either AI chat or tools, links to AI Chat for upload
- workbench.js: fetch + render doc list, delete with Qdrant cleanup
- tools.css: workbench-docs panel + item styles
- i18n.php: my_docs_* strings in all 4 languages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

assets/css/tools.css

@@ -6196,10 +6196,83 @@ body.lt-landing {
 }
 
 .workbench-panel--flow,
-.workbench-panel--outputs {
+.workbench-panel--outputs,
+.workbench-panel--docs {
   grid-column: 1 / -1;
 }
 
+.workbench-docs__desc {
+  font-size: 0.875rem;
+  color: var(--dbn-text-2, #555);
+  margin-bottom: 16px;
+}
+
+.workbench-docs__list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  margin-bottom: 16px;
+  min-height: 40px;
+}
+
+.workbench-docs__item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 8px 12px;
+  border-radius: 8px;
+  border: 1px solid var(--dbn-line, #e0ddd8);
+  background: rgba(255,255,255,0.9);
+  font-size: 0.875rem;
+}
+
+.workbench-docs__icon { flex-shrink: 0; font-size: 1rem; }
+
+.workbench-docs__name {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-weight: 500;
+}
+
+.workbench-docs__meta {
+  font-size: 0.75rem;
+  color: var(--dbn-text-2, #888);
+  white-space: nowrap;
+  flex-shrink: 0;
+}
+
+.workbench-docs__remove {
+  flex-shrink: 0;
+  background: none;
+  border: 1px solid var(--dbn-line, #e0ddd8);
+  border-radius: 6px;
+  padding: 3px 10px;
+  font-size: 0.75rem;
+  cursor: pointer;
+  color: var(--dbn-text-2, #777);
+  transition: background 0.15s, color 0.15s;
+}
+
+.workbench-docs__remove:hover {
+  background: #fee2e2;
+  color: #b91c1c;
+  border-color: #fca5a5;
+}
+
+.workbench-docs__empty,
+.workbench-docs__loading {
+  font-size: 0.875rem;
+  color: var(--dbn-text-2, #888);
+  font-style: italic;
+}
+
+.workbench-docs__cta {
+  display: inline-block;
+  font-size: 0.875rem;
+}
+
 .workbench-section-head {
   display: flex;
   align-items: baseline;

assets/js/workbench.js

@@ -94,3 +94,80 @@
     });
   }
 }());
+
+// ── My Documents panel ────────────────────────────────────────────────────────
+(function () {
+  'use strict';
+
+  var panel = document.querySelector('[data-my-docs="true"]');
+  var list  = document.getElementById('myDocsList');
+  if (!panel || !list) return;
+
+  var lang = (window.DBN_TOOLS_LANG || 'en');
+
+  var i18n = {
+    empty:  { en: 'No documents uploaded yet. Upload PDFs, DOCX, or TXT files in the AI Chat sidebar.', no: 'Ingen dokumenter lastet opp ennå. Last opp PDF, DOCX eller TXT i AI-chattens sidepanel.', uk: 'Документів ще немає. Завантажте файли у бічній панелі AI-чату.', pl: 'Brak dokumentów. Prześlij pliki w panelu bocznym czatu AI.' },
+    remove: { en: 'Remove', no: 'Fjern', uk: 'Видалити', pl: 'Usuń' },
+    ai:     { en: 'AI Chat', no: 'AI-chat', uk: 'AI-чат', pl: 'Czat AI' },
+    tools:  { en: 'Tools', no: 'Verktøy', uk: 'Інструменти', pl: 'Narzędzia' },
+    error:  { en: 'Could not load documents.', no: 'Kunne ikke laste dokumenter.', uk: 'Не вдалося завантажити документи.', pl: 'Nie można załadować dokumentów.' },
+  };
+
+  function t(key) {
+    return (i18n[key] && i18n[key][lang]) || (i18n[key] && i18n[key]['en']) || key;
+  }
+
+  function formatDate(str) {
+    if (!str) return '';
+    try { return new Date(str).toLocaleDateString(); } catch (e) { return str; }
+  }
+
+  function renderDocs(docs) {
+    if (!docs.length) {
+      list.innerHTML = '<p class="workbench-docs__empty">' + t('empty') + '</p>';
+      return;
+    }
+    list.innerHTML = docs.map(function (doc) {
+      return '<div class="workbench-docs__item" role="listitem" data-doc-id="' + esc(doc.doc_id) + '">'
+        + '<span class="workbench-docs__icon">📄</span>'
+        + '<span class="workbench-docs__name" title="' + esc(doc.filename) + '">' + esc(doc.filename) + '</span>'
+        + '<span class="workbench-docs__meta">' + esc(formatDate(doc.created_at)) + ' · ' + (doc.source === 'ai_chat' ? t('ai') : t('tools')) + '</span>'
+        + '<button class="workbench-docs__remove" type="button" data-doc-id="' + esc(doc.doc_id) + '" aria-label="' + t('remove') + ' ' + esc(doc.filename) + '">' + t('remove') + '</button>'
+        + '</div>';
+    }).join('');
+
+    list.querySelectorAll('.workbench-docs__remove').forEach(function (btn) {
+      btn.addEventListener('click', function () {
+        var docId = btn.getAttribute('data-doc-id');
+        if (!docId) return;
+        btn.disabled = true;
+        fetch('/api/user-docs.php?id=' + encodeURIComponent(docId), { method: 'DELETE', credentials: 'include' })
+          .then(function () {
+            var item = list.querySelector('[data-doc-id="' + docId + '"]');
+            if (item) item.remove();
+            if (!list.querySelector('.workbench-docs__item')) {
+              list.innerHTML = '<p class="workbench-docs__empty">' + t('empty') + '</p>';
+            }
+          })
+          .catch(function () { btn.disabled = false; });
+      });
+    });
+  }
+
+  function esc(str) {
+    return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
+  }
+
+  fetch('/api/user-docs.php', { credentials: 'include' })
+    .then(function (r) { return r.json(); })
+    .then(function (data) {
+      if (data.ok) {
+        renderDocs(data.docs || []);
+      } else {
+        list.innerHTML = '<p class="workbench-docs__empty">' + t('error') + '</p>';
+      }
+    })
+    .catch(function () {
+      list.innerHTML = '<p class="workbench-docs__empty">' + t('error') + '</p>';
+    });
+}());