feat(tools): persona selector across standalone tools + dashboard chat

Wire the legal-domain persona picker into corpus, deep-research, korrespond and
the dashboard chat. Each endpoint reads the chosen profile, resolves its packages
against client 57, and scopes retrieval via package_ids (falling back to family
when omitted). New dashboard tenants now subscribe to all DBN domain packages so
persona switching survives the subscription intersection.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

assets/js/korrespond.js

@@ -12,6 +12,7 @@
   let lastClassify = null;
   let lastFinal = null;
   let pendingClarifications = {};
+  let persona = '';
 
   const LANG_LABELS = { en: 'English', no: 'Norsk', uk: 'Українська', pl: 'Polski' };
 
@@ -116,6 +117,8 @@
       clarifyList:    document.getElementById('korrClarifyList'),
       clarifyContinue:document.getElementById('korrClarifyContinue'),
       clarifyForce:   document.getElementById('korrClarifyForce'),
+      personaControl: document.getElementById('korrPersonaControl'),
+      personaSelect:  document.getElementById('korrPersonaSelect'),
     });
 
     if (!els.form) return;
@@ -124,6 +127,7 @@
     bindGoalChips();
     bindUpload();
     bindClarify();
+    loadPersonas();
     applyStaticI18n();
     els.form.addEventListener('submit', (e) => { e.preventDefault(); runRequest(false); });
   });
@@ -279,9 +283,37 @@
       engine:         (document.querySelector('[name="korrEngine"]:checked')?.value ?? 'azure_mini'),
     };
     if (korrDocIds.length) payload.doc_ids = korrDocIds;
+    if (persona) payload.profile = persona;
     return payload;
   }
 
+  async function loadPersonas() {
+    if (!els.personaSelect) return;
+    try {
+      const r = await fetch('api/personas.php', { credentials: 'same-origin', headers: { Accept: 'application/json' } });
+      const data = await r.json().catch(() => ({}));
+      if (!r.ok || data.ok !== true || !Array.isArray(data.personas) || !data.personas.length) return;
+      const fallback = data.default_persona || 'family';
+      els.personaSelect.innerHTML = '';
+      data.personas.forEach((p) => {
+        const opt = document.createElement('option');
+        opt.value = p.slug;
+        opt.textContent = p.name || p.slug;
+        els.personaSelect.appendChild(opt);
+      });
+      const saved = sessionStorage.getItem('dbnPersona');
+      const initial = (saved && data.personas.some((p) => p.slug === saved)) ? saved
+        : (data.personas.some((p) => p.slug === fallback) ? fallback : data.personas[0].slug);
+      persona = initial;
+      els.personaSelect.value = initial;
+      els.personaSelect.addEventListener('change', () => {
+        persona = els.personaSelect.value;
+        sessionStorage.setItem('dbnPersona', persona);
+      });
+      els.personaControl?.classList.remove('is-hidden');
+    } catch (_) { /* personas are optional UI sugar; ignore failures */ }
+  }
+
   async function runRequest(forceDraft) {
     const payload = buildPayload(forceDraft);
     if (!payload.recipient_body) {