[Feature] Import system metadata from TTRPG Wiki or DriveThruRPG

[hunter-read]

What problem does this solve?

Filling in system metadata by hand (description, publisher, genre, year, license, cover, and the new fields proposed in the metadata-expansion issue) is tedious and error-prone. Much of this data already exists on public sources.

What would you like to see?

A "fetch metadata" action on a game system that looks the system up on an external source and pre-fills its fields, letting the user review/edit before saving. Two proposed sources:

• TTRPG Wiki — community-maintained system data.
• DriveThruRPG — product/publisher data and cover art.

Flow: pick a source → search/match the system → preview fetched fields → apply selectively.

Notes / open questions

• Feasibility depends on each source's API/terms — DriveThruRPG in particular may have no public API and would need scraping (respect ToS) or a manual paste-a-URL approach. Needs a research spike per source.
• Pairs with [Feature] Expand system metadata: dice/materials, system family, license, year #202 (expanded system metadata fields) — this is the auto-population path for those fields.
• Should be non-destructive: never silently overwrite user-entered values; surface a diff/merge step.

Filed for tracking.