feat(orchestrator): W2 Kanban board with swimlanes and forecast

Tasks gain a Kanban board: columns Waiting, Running and Done, swimlanes P1 to P4+ and Unpinned by WSJF, after-dependency arrows and the dashed queue line; drag and drop stages status, pin and dependency moves that apply with one passkey. The burn chart gets the trend and a forecast. Committed below the bar on the operator's word 2026-11-12 (no further per-bundle tests, one gate after the merge): the W2 e2e never ran.

🎯 Fix: 80 %
💥 Break: 10 %
💸 Cost: 100 %
⏱️ Time: 100 %
🛡️ Security: 100 %
🏆 Score: 72
🚦 Gate: ⛔ fix 80 % < 90, break 10 % > 5

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

orchestrator/templates/index.html.j2

@@ -412,6 +412,8 @@ pre.notes { margin: 0; padding: 8px 10px; background: var(--sunken); border-radi
 
 {% include "style-tasks.css" %}
 
+{% include "style-kanban.css" %}
+
 {% include "style-bubbles.css" %}
 </style>
 </head>
@@ -462,6 +464,8 @@ pre.notes { margin: 0; padding: 8px 10px; background: var(--sunken); border-radi
 {% include "faces.js" %}
 
 {% include "plan.js" %}
+
+{% include "kanban.js" %}
 </script>
 <script nonce="{{ nonce }}">
 {# Jinja drops each file's last newline and trim_blocks the one after the tag: the blank lines keep consecutive modules on separate lines #}
@@ -536,6 +540,8 @@ pre.notes { margin: 0; padding: 8px 10px; background: var(--sunken); border-radi
 
 {% include "page-tasks-gantt.js" %}
 
+{% include "page-kanban.js" %}
+
 {% include "page-choices.js" %}
 
 {% include "page-time.js" %}