PR #82 made `meta.aspect_ratio` crop Facebook (and already Instagram) feed
images at publish time, but the API and MCP surfaces only half-supported it:
you couldn't set meta at creation, the value wasn't validated, and responses
never returned it. This closes those gaps.
- New `AspectRatio` enum is the single source of truth for the allowed ratios
(1:1, 4:5, 16:9, original). App/API/MCP requests now validate via
`Rule::enum(AspectRatio::class)` — an invalid ratio is rejected everywhere
instead of silently center-cropping to square.
- API `StorePostRequest` and MCP `CreatePostTool` now accept `platforms.*.meta`;
`CreatePost` persists it. MCP create documents `meta` in its schema.
- `Api\PostPlatformResource` now exposes `meta`, so API and MCP responses return
the aspect_ratio (and other per-platform meta) a client set.
- Extract business logic from controllers into Action classes:
Post/, Workspace/, Hashtag/, Label/, Invite/, ApiKey/
- Create subdomain routing: app.trypost.test (Inertia dashboard),
api.trypost.test (REST API with token auth)
- Add ApiToken model with tp_ prefix, token_lookup/hash auth
- Add AuthenticateApiToken middleware for API authentication
- Create Api controllers with JSON Resources for all entities
- Create App controllers that use Actions + Inertia responses
- Organize Form Requests into Api/ and App/ directories
- Add api_tokens migration
- Update all route names with app. prefix
- Update all tests to use new route names (684 passing)
