Use active view for fallback zoom actions

[rishabhk571]

Description

What this does:
Updates the fallback ExtendScript zoom payloads so they target the active viewer view instead of always using View 1.

Why it matters:
This fixes multi-view layouts where fallback zoom actions can affect views[0] even when another view is selected.

Changes

• Replaces hardcoded app.activeViewer.views[0] usage in both fallback zoom payloads.
• Reads activeViewer.activeViewIndex and validates it before selecting a view.
• Falls back to index 0 only when the active view index is missing or invalid.
• Returns early when there is no active viewer or no view list.
• Bumps the plug-in source version to 0.3.2.

Validation

• Confirmed the updated source uses activeViewer.activeViewIndex in both fallback payloads.
• Confirmed the updated source no longer contains hardcoded fallback views[0] usage.
• Compared the supplied old and new Windows plug-ins: the old binary contains two app.activeViewer.views[0] payloads, while the new binary contains two activeViewer.activeViewIndex payloads.
• Release build was not rerun in this checkout because cmake and ninja are not available on PATH.