* refactor: replace custom generation indicator with action-loader
Remove custom generation tracking (activeGenerations counter, generationToast) and replace with action-loader's non-blocking stoppable toast. Import loader from action-loader.js and use loader.show() with onStop callback in generatePicture() and generateMediaSwipe(). Remove updateGenerationIndicator(), startGenerationTracking(), and endGenerationTracking() functions. Remove manual stop button show/hide logic and generation counter updates
* Remove legacy stop button, add sentinel handler value
* fix: reassign loaderHandle in generateMediaSwipe
* feat: add data attributes to action-loader toast for easier selection
Add loaderId, title, and blocking data attributes to toast content div to enable programmatic identification and filtering of active loader toasts
* Revert "feat: add data attributes to action-loader toast for easier selection"
This reverts commit e8da27b4c94b389d5970a6bea6c7b1c94459b460.
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Co-authored-by: Cohee <18619528+Cohee1207@users.noreply.github.com>
Wolfsblvt