feat(corpus): add save-to-corpus + private corpus search scope

- POST /api/save-to-corpus.php — saves tool output text to user's default CaveauAI corpus via ClientRagPipeline
- api/case/upload.php — dual-writes uploaded PDFs to CaveauAI client_documents (best-effort)
- assets/js/corpus-save.js — shared <dialog> handler for .js-save-corpus buttons on all tool pages
- includes/layout_footer.php — injects corpus-save.js + shared save dialog markup
- korrespond/deep-research/barnevernet/discrepancy JS — save-to-corpus buttons on output sections
- api/search.php + LegalTools::search() — corpus_scope param ('shared'|'private'|'both'), merges personal CaveauAI corpus with shared legal library when 'both'
- includes/tool_form.php + assets/js/tools.js — corpus scope radio toggle shown on search tab
- api/user-docs.php — add POST upload method for non-SSO authenticated users

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

assets/js/barnevernet.js

@@ -813,6 +813,21 @@
       els.results.appendChild(finalContainer.firstChild);
     }
 
+    // Save-to-corpus button
+    const briefEl = els.results.querySelector('.dr-brief');
+    if (briefEl) {
+      briefEl.id = 'bvjBriefText';
+      const saveBtn = document.createElement('button');
+      saveBtn.type = 'button';
+      saveBtn.className = 'js-save-corpus secondary-button';
+      saveBtn.dataset.tool = 'barnevernet';
+      saveBtn.dataset.contentId = 'bvjBriefText';
+      saveBtn.dataset.suggestedTitle = 'BVJ analyse: ' + (document.getElementById('bvjQuestion')?.value?.slice(0, 80) ?? 'Svar');
+      saveBtn.textContent = 'Save to corpus';
+      saveBtn.style.marginTop = '12px';
+      briefEl.insertAdjacentElement('afterend', saveBtn);
+    }
+
     // Bind source card clicks
     els.results.querySelectorAll('.dr-source-card[data-source-n]').forEach((node) => {
       node.addEventListener('click', (e) => {

assets/js/corpus-save.js

@@ -0,0 +1,106 @@
+/**
+ * corpus-save.js — "Save to corpus" shared handler for all DBN tool pages.
+ *
+ * Buttons that trigger a save must have:
+ *   class="js-save-corpus"
+ *   data-content-id="<id of element containing the text to save>"
+ *   data-tool="<source_tool slug, e.g. korrespond>"
+ *   data-suggested-title="<pre-filled title string>"  (optional)
+ */
+
+(function () {
+  'use strict';
+
+  const dlg      = document.getElementById('save-corpus-dialog');
+  const form     = document.getElementById('save-corpus-form');
+  const titleIn  = document.getElementById('save-corpus-title');
+  const tagsIn   = document.getElementById('save-corpus-tags');
+  const cancelBtn = document.getElementById('save-corpus-cancel');
+
+  if (!dlg || !form) return; // dialog not present (e.g. not logged in)
+
+  cancelBtn?.addEventListener('click', () => dlg.close());
+
+  let _pendingBtn  = null;
+  let _pendingContent = '';
+  let _pendingTool = '';
+
+  // Delegated click — catches buttons added dynamically by tool JS
+  document.addEventListener('click', (e) => {
+    const btn = e.target.closest('.js-save-corpus');
+    if (!btn) return;
+
+    const contentId = btn.dataset.contentId;
+    const el = contentId ? document.getElementById(contentId) : null;
+    const content = (el ? (el.value ?? el.textContent) : '').trim();
+
+    if (!content || content.length < 30) {
+      btn.textContent = 'Nothing to save';
+      setTimeout(() => { btn.textContent = 'Save to corpus'; }, 2000);
+      return;
+    }
+
+    _pendingBtn     = btn;
+    _pendingContent = content;
+    _pendingTool    = btn.dataset.tool ?? '';
+
+    titleIn.value = btn.dataset.suggestedTitle ?? '';
+    tagsIn.value  = '';
+    dlg.showModal();
+    titleIn.focus();
+    titleIn.select();
+  });
+
+  // Form submit inside dialog
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    dlg.close();
+
+    const btn     = _pendingBtn;
+    const content = _pendingContent;
+    const title   = titleIn.value.trim();
+    const tags    = tagsIn.value.trim();
+    const tool    = _pendingTool;
+
+    if (!title || !content) return;
+
+    if (btn) {
+      btn.disabled    = true;
+      btn.textContent = 'Saving…';
+    }
+
+    try {
+      const resp = await fetch('api/save-to-corpus.php', {
+        method:  'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body:    JSON.stringify({ title, content, source_tool: tool, tags }),
+      });
+
+      const data = await resp.json().catch(() => ({}));
+
+      if (resp.ok && data.ok) {
+        if (btn) {
+          btn.textContent = '✓ Saved to corpus';
+          btn.classList.add('js-save-corpus--saved');
+        }
+      } else {
+        const msg = data.error ?? `Error ${resp.status}`;
+        if (btn) {
+          btn.textContent = 'Save failed';
+          btn.disabled    = false;
+          btn.title       = msg;
+        }
+        console.error('[corpus-save] Save failed:', msg);
+      }
+    } catch (err) {
+      if (btn) {
+        btn.textContent = 'Network error';
+        btn.disabled    = false;
+      }
+      console.error('[corpus-save] Network error:', err);
+    }
+
+    _pendingBtn     = null;
+    _pendingContent = '';
+  });
+}());

assets/js/deep-research.js

@@ -563,6 +563,21 @@
       ${nextHtml}
     `;
 
+    // Save-to-corpus button (inject after brief block)
+    const briefEl = els.results.querySelector('.dr-brief');
+    if (briefEl) {
+      briefEl.id = 'drBriefText';
+      const saveBtn = document.createElement('button');
+      saveBtn.type = 'button';
+      saveBtn.className = 'js-save-corpus secondary-button';
+      saveBtn.dataset.tool = 'deep-research';
+      saveBtn.dataset.contentId = 'drBriefText';
+      saveBtn.dataset.suggestedTitle = 'Research: ' + (document.getElementById('drQuery')?.value?.slice(0, 80) ?? 'Report');
+      saveBtn.textContent = 'Save to corpus';
+      saveBtn.style.marginTop = '12px';
+      briefEl.insertAdjacentElement('afterend', saveBtn);
+    }
+
     // Bind source-card click handlers (open modal) — but ignore clicks on inner <a>
     els.results.querySelectorAll('.dr-source-card[data-source-n]').forEach((node) => {
       node.addEventListener('click', (e) => {

assets/js/discrepancy.js

@@ -551,6 +551,17 @@
       els.results.appendChild(finalContainer.firstChild);
     }
 
+    // Save-to-corpus button (appended after final results)
+    const saveBtn = document.createElement('button');
+    saveBtn.type = 'button';
+    saveBtn.className = 'js-save-corpus secondary-button';
+    saveBtn.dataset.tool = 'discrepancy';
+    saveBtn.dataset.contentId = 'dcResults';
+    saveBtn.dataset.suggestedTitle = 'Discrepancy report';
+    saveBtn.textContent = 'Save to corpus';
+    saveBtn.style.marginTop = '16px';
+    els.results.appendChild(saveBtn);
+
     // Bind tabs
     els.results.querySelectorAll('.dc-tab').forEach((btn) => {
       btn.addEventListener('click', () => {

assets/js/korrespond.js

@@ -543,6 +543,12 @@
             </div>
           </div>
           <pre class="korr-draft-body" id="korrDraftNo">${esc(draftNo)}</pre>
+          <button type="button" class="js-save-corpus secondary-button"
+            data-tool="korrespond"
+            data-content-id="korrDraftNo"
+            data-suggested-title="${esc((data.output_type || 'Brev') + ' — ' + (data.recipient_body || ''))}">
+            Save to corpus
+          </button>
         </div>
         ${isSameLang ? '' : `
         <div class="korr-draft-col">
@@ -554,6 +560,12 @@
             </div>
           </div>
           <pre class="korr-draft-body" id="korrDraftUser">${esc(draftUser)}</pre>
+          <button type="button" class="js-save-corpus secondary-button"
+            data-tool="korrespond"
+            data-content-id="korrDraftUser"
+            data-suggested-title="${esc((data.output_type || 'Brev') + ' — ' + (data.recipient_body || '') + ' (translation)')}">
+            Save to corpus
+          </button>
         </div>`}
       </div>
 

assets/js/tools.js

@@ -910,6 +910,7 @@ document.addEventListener('DOMContentLoaded', () => {
     uploadFileList: document.querySelector('#uploadFileList'),
     uploadClear: document.querySelector('#uploadClear'),
     aliasSection: document.querySelector('#aliasSection'),
+    corpusScopeControl: document.querySelector('#corpusScopeControl'),
     addAliasRow: document.querySelector('#addAliasRow'),
     aliasRows: document.querySelector('#aliasRows'),
     audioZone: document.querySelector('#audioZone'),
@@ -1013,6 +1014,7 @@ function setTool(toolName) {
     els.input.placeholder = tool.placeholder;
   }
   els.languageControl.classList.toggle('is-hidden', !tool.usesLanguage);
+  els.corpusScopeControl?.classList.toggle('is-hidden', toolName !== 'search');
   els.redactionControl.classList.toggle('is-hidden', toolName !== 'redact');
   els.uploadZone.classList.toggle('is-hidden', toolName !== 'redact' && toolName !== 'timeline');
   els.aliasSection.classList.toggle('is-hidden', toolName !== 'redact');
@@ -1080,6 +1082,7 @@ async function runTool(event) {
   }
   if (state.activeTool === 'search') {
     payload.limit = 7;
+    payload.corpus_scope = currentCorpusScope();
   }
   if (state.activeTool === 'redact') {
     lastOriginalText = text;
@@ -1329,6 +1332,10 @@ function currentLanguage() {
   return document.querySelector('input[name="language"]:checked')?.value || 'en';
 }
 
+function currentCorpusScope() {
+  return document.querySelector('input[name="corpusScope"]:checked')?.value || 'both';
+}
+
 function currentRedactionMode() {
   return document.querySelector('input[name="redactionMode"]:checked')?.value || 'standard';
 }