Addresses the actual root cause behind the Denmark 2026 corrupted-coordinate bug: there was no supported way to set an entry's location to somewhere other than the current GPS position, forcing hand-typed/pasted raw coordinates through Admin2's fragile text field. Backend sanitization (cache-on-save) already guards against silent corruption; this spec adds a frontend way to avoid needing that path at all.
docs/
If you're Mischa
Doing something operational? → guides/
- Posting a journal entry
- Managing GPX files
- Switching to a new trip
- Rebuilding local dev from scratch
Checking project status? → working/
Design or architecture decisions? → reference/
If you're Claude
Always-loaded project rules → CLAUDE.md (repo root)
Active specs and plans → working/specs/ and working/plans/
Stable facts → reference/
Raw research input → research/