Adds a "Tags" section to /settings between Collectives and Account. Lists
every tag in the active collective with:
* inline rename — tap the chip, edit, Enter / blur to save
* recolor swatch row (8 preset dots, current colour outlined)
* delete button per tag (cascades item attachments via FK)
Uses the tagsStore which is already subscribed to item_tags realtime, so
edits from another tab / device update this view live without a reload.
No new screens; everything is inline in the existing settings layout.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Oier Bravo Urtasun
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