feat: "Me (Username)" quick-select in Author field

Daanvrrequested to merge
feat/T425874-author-me-quickselect into main

Summary

  • Author cell editor surfaces a one-click "Me (Username)" quick-select that fills the canonical Commons own-work form [[User:<username>|<username>]].
  • Same quick-insert button is wired into the column-defaults UI (Columns modal row + per-header default popover), so a whole batch can be auto-populated.
  • At publish time, an Author whose value matches the canonical self-author wikitext (or the bare username) also emits the matching SDC creator (P170) claim — somevalue mainsnak with qualifiers P2093 (author name string), P4174 (Wikimedia username), P2699 (URL to the user page). Free-text authors stay wikitext-only.

Phabricator

  • T425874 — own-work author = uploader

Forms verified against current Commons docs and real recent own-work uploads (M28633332 Tuxyso / M154373445 JJ Harrison). Research notes posted as a comment on the task.

Test plan

  • Logged-in user opens an Author cell, sees a "Me (Username)" pill below the input
  • Click → cell value becomes [[User:<your-username>|<your-username>]]
  • After publishing such an item, the resulting {{Information |author=...}} matches what Commons expects
  • After publishing, the file's M-entity has a P170 somevalue claim with P2093/P4174/P2699 qualifiers (verifiable via Special:EntityData/M<pageid>.json)
  • Columns modal Author row shows the "Me" button next to the default-value input; click → default value is set to [[User:X|X]]
  • Per-header default popover (cog icon on Author column) also shows the "Me" button
  • If the Author field already shows the canonical self form, the quick-select pill is hidden (no redundant suggestion)
  • Free-text Author values (e.g. "Acme Co.") publish without a P170 claim — only the wikitext

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