Changelog

Update test files to match current struct definitions:

• StsCredentials: add missing `prefix` and `endpoint` fields
• CloudSyncStatus: add `is_rate_limited`, `rate_limit_remaining_secs`,

`synced_entity_count`, `total_entity_count` fields

• PendingChanges: rename `entities` → `pending` field
• PendingEntity: rename `current_cursor` → `latest_cursor`, remove `batches`

Add CloudError::is_transient() to detect 503s, connection resets, dispatch

failures, and timeouts. The sync engine now logs these at debug level with

a "(transient, will retry next cycle)" note instead of error/warn, reducing

log noise from normal S3 hiccups. Genuine failures remain at error/warn.

Checkboxes and radio buttons were crammed into side-by-side *,* grid

columns and overflowing into each other. Replaced with full-width

stacked rows — each control type (inputs, checkboxes, radios, toggle,

progress bars) gets its own row with no overlap.

Restructured Form Elements preview section from mismatched two-column

stacks (text inputs + checkboxes vs radio buttons + toggle + progress)

into row-aligned pairs: text inputs side-by-side, checkboxes next to

radio buttons, toggle switch next to progress bars. Each row now has

visually related controls at the same vertical position. Added disabled

input state preview, renamed radio labels to "Option A/B" to avoid

confusion with checkbox "Checked/Unchecked" labels.

Left color column: 420px → 540px so labels like "Surface Elevated",

"Input Background", "Primary Hover" stop truncating. Dialog MinWidth

set to 960px, outer margins reduced from 48,36 to 40,28.