Migrate menus and votes to Panorama UI Kit

.editorconfig

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+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{csproj,props,targets,xml,json,yml}]
+indent_style = space
+indent_size = 2
+
+[*.cs]
+indent_style = space
+indent_size = 4
+
+# See CODING_CONVENTIONS.md
+
+# Explicit types, never var
+csharp_style_var_for_built_in_types = false:warning
+csharp_style_var_when_type_is_apparent = false:warning
+csharp_style_var_elsewhere = false:warning
+dotnet_diagnostic.IDE0007.severity = none
+dotnet_diagnostic.IDE0008.severity = warning
+
+# Braces always, no single-line if
+csharp_prefer_braces = true:warning
+dotnet_diagnostic.IDE0011.severity = warning
+
+# No ternary
+dotnet_style_prefer_conditional_expression_over_assignment = false:silent
+dotnet_style_prefer_conditional_expression_over_return = false:silent
+dotnet_diagnostic.IDE0045.severity = none
+dotnet_diagnostic.IDE0046.severity = none
+
+# Usings
+dotnet_sort_system_directives_first = true
+dotnet_separate_import_directive_groups = false
+csharp_using_directive_placement = outside_namespace:warning
+dotnet_diagnostic.IDE0005.severity = warning
+
+# Namespaces
+csharp_style_namespace_declarations = file_scoped:suggestion
+
+# Allman braces
+csharp_new_line_before_open_brace = all
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+
+# Modifiers / this.
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:suggestion
+dotnet_style_qualification_for_field = false:suggestion
+dotnet_style_qualification_for_property = false:suggestion
+dotnet_style_qualification_for_method = false:suggestion
+dotnet_style_qualification_for_event = false:suggestion
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+
+# Unused
+dotnet_diagnostic.IDE0059.severity = suggestion
+dotnet_diagnostic.IDE0060.severity = suggestion

CODING_CONVENTIONS.md

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+# Coding conventions
+
+Rules for all C# in this repository. `.editorconfig` enforces most of them: run
+`dotnet format CS2-SimpleAdmin.sln` before committing.
+
+## Types
+
+- Always write the explicit type. No `var`.
+  ```csharp
+  List<CCSPlayerController> players = Helper.GetValidPlayers();
+  foreach (CCSPlayerController player in players) { ... }
+  ```
+- The only exception is an anonymous type, which has no name (Dapper parameters): `var parameters = new { ... };`.
+- Target-typed `new()` and collection expressions (`[]`) are fine: the type is already written on the left.
+
+## Conditions
+
+- No ternary operator (`c ? a : b`). Write an `if`, or extract a small helper that returns.
+  ```csharp
+  string status = "OFF";
+  if (loaded)
+  {
+      status = "ON";
+  }
+  ```
+- Always use braces, even for one statement. No single-line `if (x) return;`.
+- `switch` expressions on a value are fine (`penaltyType switch { ... }`).
+- `??` and `?.` are fine.
+
+## Layout
+
+- Allman braces, 4 spaces, LF line endings.
+- File-scoped namespaces.
+- `using` directives outside the namespace, `System` first, no unused ones.
+- Early return to keep nesting shallow.
+
+## Naming
+
+- PascalCase for types, methods, properties, constants. camelCase for locals and parameters. `_camelCase` for private fields.
+- A lambda parameter you do not use is `_`. Never assign to a discard (`_ = ...`) inside a lambda whose parameter is `_`: the assignment goes to the parameter.
+
+## Duplication
+
+- When the same expression shows up in several commands, add a helper in `Helper` (see `GetCallerName`,
+  `GetReasonOrUnknown`, `GetArgsReason`, `GetAdminInfo`, `GetLogName`, `Truncate`, `HasCommandPermission`).
+
+## Comments
+
+- Comment why, not what. No commented-out code: git keeps the history.
+- XML `<summary>` on public members and on anything non-obvious.
+
+## UI
+
+- All UI goes through the Panorama UI Kit (`Menus/UiKit.cs`). Never call CounterStrikeSharp chat/center menus directly.
+- Menus are built with `MenuBuilder`. A sub-menu returns `builder.WithBackButton()`; the kit draws the back button.
+- An option closes the menu after its action, unless it passes `keepOpen: true` or its action opens another menu.
+- Panorama does not render chat color tags (`{red}`, `ChatColors`): keep them out of UI text.
+- Native calls are not thread-safe: after an `await`, come back with `Server.NextWorldUpdateAsync` before touching the UI.