SeekQuote Web v0.1.3

Mobile layout fix:
- Prevents horizontal page overflow/cropping in iPhone Safari/Chrome.
- Keeps the preview and all editor controls inside the phone viewport.
- Makes the header/logo/action buttons fit without clipping.
- Constrains the slide strip and canvas correctly.
- Improves narrow-phone sizing and bottom-sheet modals.
- Renderer/export logic is unchanged.
- Existing noindex protection remains in place.
