Root cause: onchange on native <select> passes a DOM Event.
The parent handler used e.detail, which is always 0 for native events.
Sequence:
1. bind:value sets environmentId correctly
2. onchange fires -> handleEnvChange(0) overwrites to falsy
3. <select> re-renders showing 'Select environment...'
Fix:
- ConfigTabForm: onchange now passes e.target.value (the actual envId)
- +page.svelte: callback receives the envId string directly, not e.detail
@RATIONALE bind:value on <select> fires on the same change event.
The handler must not re-set the same bindable to a stale value.
Verification: browser reconfirmed — ss-dev stays selected after click.
busya
a697ff2c3d