release: v1.4.0

[kriss145]

Minor Changes

• 2b1669d: Add plan and workout structure navigation in the admin panel and fix exercise catalog selection in the structure editor.
• 2d3214f: Allow workout exercises to use either repetition or duration targets.
• 4d7378b: Record left and right weights and repetitions separately for strength sets and exercise defaults.
• 8adc18d: Show group protocol details above exercises in workout tracking.

Patch Changes

• 420d6b9: Support multiple CORS / CSRF-trusted origins via the optional PAYLOAD_CORS env var (comma-separated). Defaults to serverURL, so existing single-origin deployments are unaffected. Useful for permitting an extra origin (e.g. a www. variant) without code changes.
• fd08425: Reorganize training and sharing code into domain-oriented business modules. Move frontend components, server queries, and Payload Admin extensions behind explicit module boundaries without changing user-facing behavior.
• 66d61f7: Standardize rest duration labels as Rest(s) in workout group configuration.