89d64f64b3
New documentation/controller/import-and-data-paths.md: the canonical import root (and why it is NOT a registered StoragePath), the three data_paths roles, the Fork-3 validation asymmetry, the class-driven copy rule, and the seven invariants a future change must not break. Capability map "File access via browser" — status DELIBERATELY UNCHANGED. The drop-zone now has its own FileBrowser source and the app page carries a deep link, both verified live, but nothing drove the FileBrowser HTTP UI (no browser on DooPlex), so the row's standing "browse is exercised in no doc" caveat still holds and PROVEN-LIVE remains unearned. R-75 collapsed to its shipped one-liner. R-76 left open — this task does not fix it, and nothing built here assumes an import/* directory stays 2775.