[UI/UX] Improve Combat Clarity — Buffs, Enemy Intents & Ability Readability

[niyazmft]

Summary

Adds three UI clarity improvements to reduce visual noise and make critical combat information immediately parseable.

Problem

Players missed buffs, misread enemy behaviors, and couldn't distinguish action buttons quickly. The #4 community complaint was poor UI readability.

Changes

New: EnemyIntentPanel

• scripts/ui/enemy_intent_panel.gd: Top-of-screen panel showing each enemy's planned action
• When it shows: At the start of the player turn; hidden during enemy turn
• Color coding:
  • 🔴 Red: Attack (targeted)
  • 🟠 Orange: AoE attack (mage)
  • 🔵 Blue: Move (shows destination tile)
  • ⚪ Gray: Wait / Stunned
• Sorting: By threat level using actual damage calculation — lethal attacks shown first
• Display: Enemy name + action abbreviation on a colored card

EntityStatusBar badges

• Status badges now appear above the HP bar for all entities
• Badges shown:
  • STN — Stunned (purple)
  • DYING — Dying state (crimson)
  • Elite prefix — e.g. ELT (gold) for elite enemies
• update_badges(entity) called every turn start

BottomConsole color coding

• Move button: Blue accent + tooltip "Move (WASD / Arrows)"
• Attack button: Red-orange accent + tooltip "Attack (Click target)"
• End Turn button: Gold accent + tooltip "End Turn (Space)"

CombatRoom integration

• EnemyIntentPanel added as child of UIOverlay during _setup_hud()
• _on_turn_started() refreshes panel on player turn, clears on enemy turn
• _update_status_badges() called every turn to refresh all entity badges

Behavior

Situation	UI shows
Player turn starts, 3 enemies present	Intent panel shows 3 colored cards with planned actions
Enemy is stunned	Gray "STN" card instead of attack/move
Elite enemy present	Gold ELT badge above its HP bar
Player hovers move button	Blue text + tooltip with keybind

Technical Notes

• EnemyIntentPanel uses existing EnemyAIController.decide_action() — deterministic and matches actual execution
• Threat calculation uses CombatFormula.compute_damage_from_entities() with real cover data
• Panel uses mouse_filter = IGNORE so it never blocks grid clicks
• Badges are programmatically-built PanelContainers (no new .tscn files)

Testing

• 403 tests | 0 errors | 0 failures | 75/75 suites
• Headless editor scan: clean

Related Issues

Closes #601