M3: chat widget, owner dashboard, super-admin panel

- Embeddable vanilla-JS chat widget (one script tag + tenant public key):
  WebSocket, resumable sessions (24h localStorage token), honeypot + per-IP
  and per-message rate limits, Bosnian UI (§7)
- Session auth (bcrypt + signed cookies), owner accounts + super-admins,
  admin impersonation ('otvori kao salon', §11)
- Owner dashboard (§10, Bosnian): requests with same actions as email,
  call/chat history with transcripts, usage bar; settings for profile,
  working hours (manual + LLM paste-to-parse), services CRUD + 'Zalijepi
  cjenovnik' LLM import with review step, scheduling (Google OAuth free/busy
  read-only + calendar mappings + buffers, partner status), telephony
  (forwarding MMI codes per operator, ring group, worker SIP creds + QR),
  agent voice/price-mode/notes + widget snippet, notifications/SMS templates
- Super-admin panel (§11): tenant CRUD incl. plan/minutes/paid-until,
  partner API config (encrypted secrets), number/SIM registry + assignment,
  connectivity test (live availability + dry-run push), versioned prompt
  template editor with publish/rollback, playground, usage overview, health
- Fixes: WAL + busy_timeout for sqlite tests, no awaits in WS disconnect
  path (deadlock), template publish autoflush bug
- 76 tests green (incl. widget WS e2e booking flow); dashboard, widget and
  admin verified live in a browser against Postgres

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

gogo/templates/dashboard/agent.html

@@ -0,0 +1,50 @@
+{% extends "base.html" %}
+{% block title %}Asistent — {{ owner.tenant.name }}{% endblock %}
+{% block nav %}{% include "dashboard/_nav.html" %}{% endblock %}
+{% block content %}
+<h1>Virtuelni asistent</h1>
+
+<form method="post" action="/dash/agent">
+<div class="grid2">
+  <div class="card">
+    <h2>Glas i cijene</h2>
+    <label>Glas asistenta</label>
+    <select name="tts_voice">
+      {% for v in voices %}
+      <option value="{{ v.id }}" {{ 'selected' if t.tts_voice==v.id }}>{{ v.label }}</option>
+      {% endfor %}
+    </select>
+    <label>Kako asistent odgovara na pitanja o cijenama</label>
+    <select name="price_mode">
+      <option value="exact" {{ 'selected' if t.price_mode=='exact' }}>Kaže tačnu cijenu</option>
+      <option value="range" {{ 'selected' if t.price_mode=='range' }}>Kaže raspon (od–do)</option>
+      <option value="on_request" {{ 'selected' if t.price_mode=='on_request' }}>„Cijene na upit"</option>
+    </select>
+  </div>
+  <div class="card">
+    <h2>Napomene za asistenta</h2>
+    <p class="muted">Činjenice o salonu koje asistent smije reći klijentima
+    (npr. „parking iza zgrade", „ne primamo djecu ispod 7 godina").</p>
+    <textarea name="agent_notes" style="min-height:120px">{{ t.agent_notes }}</textarea>
+  </div>
+</div>
+<button>Sačuvaj</button>
+</form>
+
+<div class="card" style="margin-top:20px">
+  <h2>Chat widget za vašu web stranicu</h2>
+  <p class="muted">Zalijepite ovaj red koda pred kraj <code>&lt;body&gt;</code> taga vaše
+  stranice (ili ga pošaljite onome ko vam održava web):</p>
+  <pre>&lt;script src="{{ base_url }}/widget.js" data-gogo-key="{{ t.widget_public_key }}" async&gt;&lt;/script&gt;</pre>
+  <p class="muted">Isprobajte razgovor na <a href="/widget-demo/{{ t.widget_public_key }}" target="_blank">demo stranici</a>.</p>
+</div>
+
+<div class="card">
+  <h2>Pozdravna poruka</h2>
+  <p class="muted">Pozdrav i ponašanje asistenta održava Gogo tim centralno — uvijek uključuje
+  obavještenje o snimanju razgovora. Trenutni pozdrav:</p>
+  <blockquote style="border-left:3px solid var(--brand);margin:8px 0;padding:4px 14px;color:var(--muted)">
+    {{ greeting }}
+  </blockquote>
+</div>
+{% endblock %}