[AllTerrainDeveloper]

Form authors can now insert references by typing { and reuse complete conditions instead of rebuilding nearly identical rules. For example, copy an opinion-scale condition from another field, then change “less than 6” to “at least 6”.

• Open a searchable value picker from merge-tag and calculation inputs, preserving the insertion point and edits across autosaves. Capture picker navigation before OpenStation desktop shortcuts so arrow keys cannot switch desktops or toggle Overview/Show Desktop. Notification previews describe references as {the value of Question label}.
• Add a compact Conditional button to field headers. Its dialog edits a draft with Save/Cancel and a source-only Copy condition chooser. Copying includes every rule, enabled state, show/hide and all/any matching, with independent rule objects.
• Make the bottom condition strip fully editable, including source, comparison, value, Add rule, Delete and Clear. Keep the Copy action stable on hover.
• Use os-select for predefined answers, including choices, opinion scales, ratings, toggles, countries and manageable slider ranges. Preserve obsolete stored values visibly as disabled options. Both selectors and free-text condition inputs have a 100px minimum width.
• Widen the form canvas by 100px, update builder documentation and rebuild all affected distributable bundles. Saved schema and runtime evaluation remain unchanged.

Validation: npm run typecheck, npm test (405 tests) and npm run build:bundles passed; node bin/package.mjs produced the plugin zip; git diff --check passed. Manually tested on Docker at localhost:8889: brace insertion, all four arrow keys and Enter with OpenStation active, preview text, copying, dialog save/cancel, inline rule editing, discrete selectors and minimum input widths. PHP is unchanged; the PR's CI runs the PHP checks.