feat: add per-plot axis overrides

[nmrtist]

Context

Axis labels and numeric ranges were derived entirely from dataset metadata. Users could zoom a plot, but could not persist publication-specific axis titles or exact full-range bounds across figure rebuilds.

Changes

• Add per-plot X/Y title and numeric range overrides while retaining automatic defaults.
• Apply overrides after figure reconstruction and before viewport projection, so they survive chart and data rebuilds.
• Keep viewport zoom and pan inside the overridden full range, with predictable reset and auto-Y behavior.
• Integrate override changes with undo/redo and coalesce inspector editing gestures into single actions.
• Persist overrides through the versioned project DTO with defaults for existing projects.
• Add an Axes section to the object inspector, including clearable inactive ranges for categorical or hidden axes.
• Keep inspector rendering safe during canvas and selection transition frames.
• Document axis controls in the English and Simplified Chinese user guides.

Testing

• cargo pr-check
• npm run build in docs/
• cargo release-build
• Loaded and rendered a representative 16 x 40,960 JEOL DOSY JDF file in the release application.