feat: V2 microservices stack — backend services, gateway, JWT auth

Add full V2 architecture: identity, content, studio (.NET 10) and file,
render, notification, gateway (Go) services with vendored deps, plus DB
migrations, event/API contracts, and an init-db script.

Wire the Next.js frontend to the gateway: server-side JWT auth routes
(login/register/refresh/logout/me), gateway fetch helper, and session/
cookie/jwt helpers under src/lib.

Containerize the stack via docker-compose.v2.yml and per-service
Dockerfiles. Base images resolve through a Nexus mirror (Docker Hub) and
MCR directly; npm/NuGet pull from Nexus groups. Self-host fonts via
next/font/local to avoid Google Fonts (geo-blocked).

Add CI workflow and ignore .env.v2, *.stackdump, and .NET bin/obj.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

services/studio/FlatRender.StudioSvc/Domain/Entities/Studio.cs

@@ -0,0 +1,289 @@
+using FlatRender.StudioSvc.Domain.Enums;
+
+namespace FlatRender.StudioSvc.Domain.Entities;
+
+public class SavedProject
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+    public Guid TenantId { get; set; }
+    public Guid UserId { get; set; }
+
+    // Source template snapshot
+    public Guid OriginalProjectId { get; set; }
+    public string OriginalProjectName { get; set; } = default!;
+    public Guid? OriginalContainerId { get; set; }
+    public string? OriginalContainerSlug { get; set; }
+
+    // Identity
+    public string Name { get; set; } = default!;
+    public string? Image { get; set; }
+    public SavedProjectType Type { get; set; } = SavedProjectType.Draft;
+
+    // Project metadata snapshot
+    public int FrameRate { get; set; } = 30;
+    public decimal ProjectDurationSec { get; set; }
+    public string Resolution { get; set; } = "FullHD";
+    public string ChooseMode { get; set; } = "FLEXIBLE";
+    public decimal VipFactor { get; set; } = 1.0m;
+
+    // Audio
+    public Guid? MusicFileId { get; set; }
+    public Guid? MusicTrackId { get; set; }
+    public decimal MusicVolume { get; set; } = 0.7m;
+    public Guid? VoiceoverFileId { get; set; }
+    public decimal VoiceoverVolume { get; set; } = 1.0m;
+    public bool VoiceoverRecordedInBrowser { get; set; }
+    public decimal SfxVolume { get; set; } = 1.0m;
+    public bool SfxEnabled { get; set; } = true;
+    public string? AudioVisualizerMusicUrl { get; set; }
+    public decimal? AudioVisualizerDurationSec { get; set; }
+
+    // Customization
+    public bool ManualColorPicker { get; set; }
+    public Guid? SelectedPresetStoryId { get; set; }
+
+    // State
+    public string? LastEditStep { get; set; }
+    public string EditState { get; set; } = "{}";
+
+    public DateTime CreateDate { get; set; } = DateTime.UtcNow;
+    public DateTime LastEditDate { get; set; } = DateTime.UtcNow;
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime? DeletedAt { get; set; }
+
+    public ICollection<SavedScene> Scenes { get; set; } = [];
+    public ICollection<SavedSharedColor> SharedColors { get; set; } = [];
+    public ICollection<SavedSharedColorPreset> SharedColorPresets { get; set; } = [];
+    public ICollection<SavedSharedLayer> SharedLayers { get; set; } = [];
+}
+
+public class SavedScene
+{
+    public long Id { get; set; }
+    public Guid SavedProjectId { get; set; }
+    public SavedProject SavedProject { get; set; } = default!;
+
+    public Guid? OriginalSceneId { get; set; }
+    public string Key { get; set; } = default!;
+    public string? Title { get; set; }
+    public string? Image { get; set; }
+    public string? Demo { get; set; }
+    public string? SceneColorSvg { get; set; }
+    public string SceneType { get; set; } = "Normal";
+
+    // Timing
+    public int Sort { get; set; }
+    public decimal SceneLengthSec { get; set; }
+    public decimal? MinDurationSec { get; set; }
+    public decimal? MaxDurationSec { get; set; }
+    public decimal OverlapAtEndSec { get; set; }
+    public bool CanHandleDuration { get; set; } = true;
+
+    // Customization
+    public bool ManualColorSelection { get; set; }
+    public long? SelectedColorPresetId { get; set; }
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+
+    public ICollection<SavedSceneContent> Contents { get; set; } = [];
+    public ICollection<SavedSceneColor> Colors { get; set; } = [];
+    public ICollection<SavedSceneColorPreset> ColorPresets { get; set; } = [];
+    public ICollection<SavedSceneCharacter> Characters { get; set; } = [];
+}
+
+public class SavedSceneContent
+{
+    public long Id { get; set; }
+    public long SavedSceneId { get; set; }
+    public SavedScene SavedScene { get; set; } = default!;
+
+    public string Key { get; set; } = default!;
+    public string? Title { get; set; }
+    public string? LocalizedTitle { get; set; }
+    public string? Hint { get; set; }
+    public string Type { get; set; } = default!;
+
+    // Value
+    public string? Value { get; set; }
+    public Guid? ValueFileId { get; set; }
+    public string? InsertedFileType { get; set; }
+    public string? FileUrlCached { get; set; }
+    public DateTime? FileUrlCachedAt { get; set; }
+
+    // Text styling
+    public string? FontFace { get; set; }
+    public string? FontFaceName { get; set; }
+    public int? FontSize { get; set; }
+    public int? DefaultFontSize { get; set; }
+    public string? DefaultFontFace { get; set; }
+    public string? Justify { get; set; }
+    public int PositionInContainer { get; set; }
+    public int DirectionLayerValue { get; set; }
+    public bool IsTextBox { get; set; }
+
+    // AI
+    public string? AiInputType { get; set; }
+
+    // Design pattern
+    public int? SelectedDp { get; set; }
+
+    // Repeater
+    public string? RepeaterItemKey { get; set; }
+    public int? RepeaterIndex { get; set; }
+
+    // State
+    public bool IsFocused { get; set; }
+    public string? Status { get; set; }
+    public string? MappedList { get; set; }
+    public string? Thumbnail { get; set; }
+
+    public int Sort { get; set; }
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}
+
+public class SavedSceneColor
+{
+    public long Id { get; set; }
+    public long SavedSceneId { get; set; }
+    public SavedScene SavedScene { get; set; } = default!;
+
+    public string ElementKey { get; set; } = default!;
+    public string? Title { get; set; }
+    public string? Icon { get; set; }
+    public string AttrValue { get; set; } = "fill";
+    public string Value { get; set; } = default!;
+    public bool IsSelected { get; set; } = true;
+    public int Sort { get; set; }
+}
+
+public class SavedSceneColorPreset
+{
+    public long Id { get; set; }
+    public long SavedSceneId { get; set; }
+    public SavedScene SavedScene { get; set; } = default!;
+    public bool IsSelected { get; set; }
+    public int Sort { get; set; }
+
+    public ICollection<SavedSceneColorPresetItem> Items { get; set; } = [];
+}
+
+public class SavedSceneColorPresetItem
+{
+    public long Id { get; set; }
+    public long PresetId { get; set; }
+    public SavedSceneColorPreset Preset { get; set; } = default!;
+    public string ElementKey { get; set; } = default!;
+    public string Value { get; set; } = default!;
+    public int Sort { get; set; }
+}
+
+public class SavedSceneCharacter
+{
+    public long Id { get; set; }
+    public long SavedSceneId { get; set; }
+    public SavedScene SavedScene { get; set; } = default!;
+
+    public Guid Key { get; set; }
+    public string? Name { get; set; }
+    public string? Icon { get; set; }
+
+    public ICollection<SavedSceneCharacterController> Controllers { get; set; } = [];
+}
+
+public class SavedSceneCharacterController
+{
+    public long Id { get; set; }
+    public long SavedSceneCharacterId { get; set; }
+    public SavedSceneCharacter Character { get; set; } = default!;
+
+    public string? Name { get; set; }
+    public string Key { get; set; } = default!;
+    public string Value { get; set; } = default!;
+    public int Sort { get; set; }
+}
+
+public class SavedSharedColor
+{
+    public long Id { get; set; }
+    public Guid SavedProjectId { get; set; }
+    public SavedProject SavedProject { get; set; } = default!;
+
+    public string ElementKey { get; set; } = default!;
+    public string? Title { get; set; }
+    public string? Icon { get; set; }
+    public string AttrValue { get; set; } = "fill";
+    public string Value { get; set; } = default!;
+    public bool IsSelected { get; set; } = true;
+    public int Sort { get; set; }
+}
+
+public class SavedSharedColorPreset
+{
+    public long Id { get; set; }
+    public Guid SavedProjectId { get; set; }
+    public SavedProject SavedProject { get; set; } = default!;
+    public string? Name { get; set; }
+    public bool IsSelected { get; set; }
+    public int Sort { get; set; }
+
+    public ICollection<SavedSharedColorPresetItem> Items { get; set; } = [];
+}
+
+public class SavedSharedColorPresetItem
+{
+    public long Id { get; set; }
+    public long PresetId { get; set; }
+    public SavedSharedColorPreset Preset { get; set; } = default!;
+    public string ElementKey { get; set; } = default!;
+    public string Value { get; set; } = default!;
+    public int Sort { get; set; }
+}
+
+public class SavedSharedLayer
+{
+    public long Id { get; set; }
+    public Guid SavedProjectId { get; set; }
+    public SavedProject SavedProject { get; set; } = default!;
+
+    public string Key { get; set; } = default!;
+    public string? Title { get; set; }
+    public string? LocalizedTitle { get; set; }
+    public string? Hint { get; set; }
+    public string Type { get; set; } = default!;
+
+    public string? Value { get; set; }
+    public Guid? ValueFileId { get; set; }
+    public string? FileUrlCached { get; set; }
+    public DateTime? FileUrlCachedAt { get; set; }
+
+    public string? FontFace { get; set; }
+    public string? FontFaceName { get; set; }
+    public int? FontSize { get; set; }
+    public int? DefaultFontSize { get; set; }
+    public string? DefaultFontFace { get; set; }
+    public string? Justify { get; set; }
+    public int PositionInContainer { get; set; }
+    public int DirectionLayerValue { get; set; }
+    public bool IsTextBox { get; set; }
+
+    public string? AiInputType { get; set; }
+    public string? MappedList { get; set; }
+    public string? Thumbnail { get; set; }
+
+    public int? Width { get; set; }
+    public int? Height { get; set; }
+    public decimal? MinDurationSec { get; set; }
+    public decimal? MaxDurationSec { get; set; }
+
+    public bool IsFocused { get; set; }
+    public bool IsFontChangeable { get; set; } = true;
+    public bool IsFontSizeChangeable { get; set; } = true;
+    public string? Status { get; set; }
+
+    public int Sort { get; set; }
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+    public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
+}