There was an issue w/ the calculation causing an infinite loop but the fixed algorithm wasn't correct bc it doesn't take into account the grid gap correctly. This then breaks arrow key navigation.
- Restore the previous calculation
- Bail out if the gallery elements don't have any width, which causes the infinite loop - this part was missed when copying the logic from GalleryImageGrid
- Allow `uploadImage` util to accept `metadata` to embed in the image
- Update compositor to support `metadata` field when uploading rasterized composite layer
- Add async zod refiner to `zImageWithDims` which fetches the image as part of validation
- Add `zServerValidatedModelIdentifierField`, a zod-refined version of `zModelIdentifierField` which fetches the model as part of validation
- Add `zCanvasMetadata` zod schema, which contains only canvas entities - no bbox, and no `isHidden` flags
- Renamed "Send to Canvas" -> "New Layer from Image"
- Added "New Canvas from Image"
This clarifies the purpose of the menu items and gives tablet users a way to easily add images tot he canvas.
Also update the verbiage for the alerts:
- "Sending to Canvas" -> "Staging Generations on Canvas"
- "Sending to Gallery" -> "Sending Generations to Gallery"
- Add buttons to zoom in/out
- Update hotkeys for fit & 100% to match affinity (e.g. ctrl+0, ctrl+1)
- Add hotkeys for 200%, 400%, 800%
- Update tooltips
This mirrors affinity/photoshop's default `d` hotkey, which sets the fg/bg to white/black. We don't have a concept of "background color", and white is more useful for control images, so it sets to white.
- Rework hotkey data to include the keys for each hotkey action.
- Add wrapper for `useHotkeys` that accepts a hotkey category and id. Automatically selects the key from the hotkey data.
- Add handling for macOS (cmd vs ctrl, option vs alt).
- Redo all hotkey descriptions, deleting nonexistant ones.
- Some `esc` hotkeys that just close whatever you are currently in are omitted due to their relative simplicity and intuitiveness.
