docs: log the dashboard UI work in the changelog

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VAyr8d7HuAdUGB6aA5xmDD

CHANGELOG.md

@@ -14,6 +14,7 @@ Format based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/); versio
 - **Zeek `dns.log` ingestion:** Daily Hive Parquet partitioning for DNS queries with deterministic column mapping by TSV header.
 - **Parquet storage schema (v1.2):** 15-column schema for `conn.log` supporting `conn_state`, `history`, `orig_pkts`, `resp_pkts`, `orig_ip_bytes`, `resp_ip_bytes`.
 - **In-memory alert reporting:** Web daemon `/api/alerts` route now serves alerts from the most recent analysis run.
+- **Real dashboard UI:** Sidebar navigation now switches panels instead of a no-op scroll. New Hosts panel ranks observed hosts by fusion score with per-pillar (P1/P2/P3) drill-down. Alerts panel is filterable/sortable by pillar and score, with full evidence rendered as a formatted table. Overview panel adds KPI tiles and two interactive SVG charts (top hosts by fusion score, alert distribution by pillar).
 
 ### Changed
 - **Breaking (0.x):** Pillar 1 formula v1.2 modifies scores and changes `Alert.id` generation to reflect the corrected bounded grid and session-based aggregation.