feat(today): focus du jour — le rituel des 3 cartes (issue #5)

Table today_picks; POST /api/today/pin (max 3, idempotent) et
/unpin; page /today (picks en direct, candidates de l'encours,
reprises d'hier, récap du jour depuis le journal); bouton 📌 sur
les cartes (délégation capture dans today.js, fragments live
compris); sections dédiées dans le briefing du matin.

app/templates/board.html

@@ -20,11 +20,13 @@
         <nav class="nav-pills">
             <a href="/" class="nav-pill">🏠 Projets</a>
             <a href="/focus" class="nav-pill">🎯 Focus</a>
+            <a href="/today" class="nav-pill">🌅 Aujourd'hui</a>
             <a href="/my" class="nav-pill">👤 Mes issues</a>
             <a href="/activity" class="nav-pill">📰 Activité</a>
             <a href="/search" class="nav-pill">🔍 Recherche</a>
             <a href="/capture" class="nav-pill">⚡ Capture</a>
             <a href="/digest" class="nav-pill">🧠 Digest</a>
+            <a href="/forecast" class="nav-pill">🔮 Prévisions</a>
             <a href="/wall" class="nav-pill">🖥️ Wallboard</a>
             <button type="button" class="nav-pill palette-trigger" title="Palette de commandes (Ctrl+K)">⌨️ Ctrl K</button>
             {% if repo_info.html_url %}
@@ -51,6 +53,10 @@
             <span class="milestone-due">📅 échéance {{ milestone_progress.due_on[:10] }}</span>
             {% endif %}
             <span class="milestone-count">{{ milestone_progress.closed }}/{{ milestone_progress.total }} issues terminées</span>
+            {% if milestone_forecast %}
+            <span class="milestone-forecast">🔮 {{ milestone_forecast }}</span>
+            {% endif %}
+            <a class="milestone-sprint" href="/sprint/{{ full_name }}?milestone={{ milestone_param|urlencode }}">📖 Récit de sprint</a>
         </div>
         <div class="progress progress-lg"><span style="width: {{ milestone_progress.pct }}%"></span></div>
         <span class="milestone-pct">{{ milestone_progress.pct }}%</span>
@@ -176,6 +182,7 @@
         {% endif %}
     </footer>
     <script src="/static/js/board-live.js" defer></script>
+<script src="/static/js/today.js" defer></script>
 {% include "_palette.html" %}
 <script src="/static/js/palette.js" defer></script>
 </body>