✨ add Nisse info panel with work log (Issue #9)

Clicking a Nisse opens a top-left panel showing name, AI status,
energy bar, active job, job priority buttons, and a live work log
(last 10 of 20 runtime-only entries). Closes via ESC, ✕, or clicking
another Nisse. Dynamic parts (status/energy/job/log) refresh each
frame without rebuilding the full group.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -8,8 +8,10 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## [Unreleased]
 
 ### Added
-- **ESC Menu**: pressing ESC when no overlay is open shows a pause menu with Save Game, Load Game, Settings (placeholder), and New Game; New Game requires confirmation before wiping the save
-- ESC key now follows a priority stack: confirmation dialog → context menu → build menu → villager panel → ESC menu → (build/farm mode handled by their systems) → open ESC menu
+- **Nisse Info Panel** (Issue #9): clicking a Nisse opens a top-left panel with name, AI status, energy bar, active job, job priority buttons, and a live work log (last 10 of 20 runtime entries); closes with ESC, ✕ button, or by clicking another Nisse
+- Work log tracks: walking to job, hauling to stockpile, going to sleep, waking up, chopped/mined/farmed results, deposited at stockpile
+- **ESC Menu** (Issue #7): pressing ESC when no overlay is open shows a pause menu with Save Game, Load Game, Settings (placeholder), and New Game; New Game requires confirmation before wiping the save
+- ESC key now follows a priority stack: confirmation dialog → context menu → build menu → villager panel → Nisse info panel → ESC menu → (build/farm mode handled by their systems) → open ESC menu
 
 ### Added
 - **F3 Debug View**: toggleable overlay showing FPS, tile type and contents under the cursor, Nisse count by AI state, active jobs by type, and pathfinding visualization (cyan lines in world space)