[Sprint 4] Create ThemeSelector, ThemeBrightnessToggle, and ThemeColorDropdown components

[mpaulosky]

Goal

Implement the three user-facing theme switcher sub-components used in NavMenu or a dedicated theme panel: ThemeSelector, ThemeBrightnessToggleComponent, and ThemeColorDropdownComponent.

Acceptance Criteria

• ThemeSelector.razor — parent container that composes the two sub-components below
• ThemeBrightnessToggleComponent.razor — toggle button (Light / Dark) that calls ThemeProvider.SetBrightness()
• ThemeColorDropdownComponent.razor — dropdown/picker for 4 colors (blue, red, green, yellow) that calls ThemeProvider.SetColor()
• All components receive ThemeProvider state via CascadingParameter or EventCallback pattern
• Selected color/brightness is visually highlighted in the UI
• Components accessible via keyboard (tab, space, enter)
• .razor files do NOT have copyright headers per charter rule chore: remove Weather and Counter template leftovers #6

Dependencies

• Issue [Sprint 4] Create ThemeProvider Blazor component with localStorage JS interop #82 (ThemeProvider) must be merged first

Owner

Legolas (Frontend / Blazor)

[github-actions]

📋 Assigned to Legolas (Frontend / Blazor)

Issue: #83 — [Sprint 4] Create ThemeSelector, ThemeBrightnessToggle, and ThemeColorDropdown components

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[github-actions]

🏗️ Squad Triage — Aragorn (Lead / Architect)

Issue: #83 — [Sprint 4] Create ThemeSelector, ThemeBrightnessToggle, and ThemeColorDropdown components
Assigned to: Legolas (Frontend / Blazor)
Reason: Issue relates to frontend/UI work

Team roster:

• Aragorn (Lead / Architect) → label: squad:aragorn
• Sam (Backend / .NET) → label: squad:sam
• Legolas (Frontend / Blazor) → label: squad:legolas
• Gimli (Tester) → label: squad:gimli
• Boromir (DevOps / Infra) → label: squad:boromir
• Gandalf (Security / Auth) → label: squad:gandalf
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