Add comprehensive UI system with action bar, unit frame, and character sheet

- Created UI system in level/ui/ folder
  - Action bar with 12 ability slots (Attack, Block, Dash, Jump + 8 expansion slots)
  - Unit frame showing player portrait with health bar
  - Character sheet/spellbook (toggle with Tab) displaying stats, weapons, and abilities
  - Tab hint indicator showing how to open character sheet
  - Custom theme with golden borders and dark backgrounds

- UI Components:
  - HUD Manager autoload handles all UI initialization and player connections
  - Ability buttons with cooldown overlay and keybind display
  - Real-time health and cooldown tracking via signals
  - Scrollable character sheet with two-page layout

- Player Integration:
  - Added UI signals: dash_cooldown_updated, attack_cooldown_updated, weapon_equipped_changed
  - Mouse capture system (Escape to toggle, click to recapture)
  - Synced attack cooldown from weapons to player for UI tracking

- Updated level.gd to connect local player to HUD Manager
- Updated CLAUDE.md with git commit guidelines

level/ui/scenes/character_sheet.tscn

@@ -0,0 +1,129 @@
+[gd_scene load_steps=4 format=3 uid="uid://cu2vkr5h5b8hb"]
+
+[ext_resource type="Script" path="res://level/ui/scripts/character_sheet.gd" id="1_script"]
+[ext_resource type="Theme" uid="uid://dvsh7tuhulnfm" path="res://level/ui/theme/wow_style.tres" id="2_theme"]
+
+[sub_resource type="StyleBoxFlat" id="StyleBoxFlat_book"]
+bg_color = Color(0.12, 0.1, 0.08, 0.95)
+border_width_left = 4
+border_width_top = 4
+border_width_right = 4
+border_width_bottom = 4
+border_color = Color(0.6, 0.5, 0.2, 1)
+corner_radius_top_left = 8
+corner_radius_top_right = 8
+corner_radius_bottom_right = 8
+corner_radius_bottom_left = 8
+
+[node name="CharacterSheet" type="Control"]
+layout_mode = 3
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+theme = ExtResource("2_theme")
+script = ExtResource("1_script")
+
+[node name="DarkBackground" type="ColorRect" parent="."]
+layout_mode = 1
+anchors_preset = 15
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 2
+grow_vertical = 2
+color = Color(0, 0, 0, 0.7)
+
+[node name="Panel" type="PanelContainer" parent="."]
+layout_mode = 1
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -450.0
+offset_top = -300.0
+offset_right = 450.0
+offset_bottom = 300.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_styles/panel = SubResource("StyleBoxFlat_book")
+
+[node name="MarginContainer" type="MarginContainer" parent="Panel"]
+layout_mode = 2
+theme_override_constants/margin_left = 20
+theme_override_constants/margin_top = 20
+theme_override_constants/margin_right = 20
+theme_override_constants/margin_bottom = 20
+
+[node name="VBoxContainer" type="VBoxContainer" parent="Panel/MarginContainer"]
+layout_mode = 2
+theme_override_constants/separation = 10
+
+[node name="TitleLabel" type="Label" parent="Panel/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme_override_colors/font_color = Color(1, 0.8, 0, 1)
+theme_override_colors/font_outline_color = Color(0, 0, 0, 1)
+theme_override_constants/outline_size = 3
+theme_override_font_sizes/font_size = 28
+text = "CHARACTER SHEET"
+horizontal_alignment = 1
+
+[node name="HSeparator" type="HSeparator" parent="Panel/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme_override_constants/separation = 5
+
+[node name="HBoxContainer" type="HBoxContainer" parent="Panel/MarginContainer/VBoxContainer"]
+layout_mode = 2
+size_flags_vertical = 3
+theme_override_constants/separation = 20
+
+[node name="LeftPage" type="PanelContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="ScrollContainer" type="ScrollContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/LeftPage"]
+layout_mode = 2
+horizontal_scroll_mode = 0
+
+[node name="StatsContainer" type="VBoxContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/LeftPage/ScrollContainer"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_constants/separation = 2
+
+[node name="Divider" type="VSeparator" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer"]
+layout_mode = 2
+
+[node name="RightPage" type="PanelContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer"]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="ScrollContainer" type="ScrollContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/RightPage"]
+layout_mode = 2
+horizontal_scroll_mode = 0
+
+[node name="ContentContainer" type="VBoxContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/RightPage/ScrollContainer"]
+layout_mode = 2
+size_flags_horizontal = 3
+theme_override_constants/separation = 10
+
+[node name="WeaponsContainer" type="VBoxContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/RightPage/ScrollContainer/ContentContainer"]
+layout_mode = 2
+theme_override_constants/separation = 2
+
+[node name="Spacer" type="Control" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/RightPage/ScrollContainer/ContentContainer"]
+custom_minimum_size = Vector2(0, 15)
+layout_mode = 2
+
+[node name="AbilitiesContainer" type="VBoxContainer" parent="Panel/MarginContainer/VBoxContainer/HBoxContainer/RightPage/ScrollContainer/ContentContainer"]
+layout_mode = 2
+theme_override_constants/separation = 2
+
+[node name="CloseHint" type="Label" parent="Panel/MarginContainer/VBoxContainer"]
+layout_mode = 2
+theme_override_colors/font_color = Color(0.7, 0.7, 0.7, 1)
+theme_override_colors/font_outline_color = Color(0, 0, 0, 1)
+theme_override_constants/outline_size = 1
+theme_override_font_sizes/font_size = 14
+text = "Press TAB to close"
+horizontal_alignment = 2