TP-03 — Add `QueryaThemeManifest` model

[ZhuchkaTriplesix]

Epic: A
Depends on: TP-02

Source: docs/theme-parser-github-issues.md

Goal

Create an immutable model for Querya custom theme manifests without converting colors to Flutter Color yet.

Files

• lib/core/theme/parser/querya_theme_manifest.dart
• test/core/theme/parser/querya_theme_manifest_test.dart

Implementation

Add:

enum QueryaThemeType { dark, light }

class QueryaThemeManifest {
  const QueryaThemeManifest({
    required this.schema,
    required this.id,
    required this.name,
    required this.type,
    required this.shadcnColors,
    required this.editorColors,
    this.tokenColors = const [],
    this.description,
    this.author,
    this.version,
  });
}

class QueryaThemeManifestParseException implements Exception {
  const QueryaThemeManifestParseException(this.message);
  final String message;
}

Fields:

• schema: String
• id: String
• name: String
• type: QueryaThemeType
• shadcnColors: Map<String, String>
• editorColors: Map<String, String>
• tokenColors: List<TokenColorRule>
• optional metadata fields.

Add QueryaThemeManifest.fromJsonString(String raw).

Use existing:

• stripJsonc
• TokenColorRule / existing token color parser path where possible.

Performance Notes

• Do not create Color, QueryaTheme, or ThemeData here.
• Keep maps unmodifiable.
• Parsing should be pure and synchronous for a single file; async belongs in services.

Acceptance Criteria

• Valid dark/light fixtures parse.
• JSONC fixture parses.
• Missing required fields throw QueryaThemeManifestParseException.
• Unknown fields are ignored.
• Returned maps are immutable or safely copied.

Tests

Cover:

• valid full dark;
• valid full light;
• minimal manifest;
• JSONC comments/trailing commas;
• missing id;
• invalid type;
• empty shadcn_colors / editor_colors behavior according to docs.

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