The decoder/encoder lookup now takes an optional DF context and resolves
DF-first, then name, then FID (the spec keys files by FID within their
DF; the name is a display label). efDfFromPath derives the parent DF
segment of a canonical path.
EF.ECC is split into its two DF-specific decoders: DF.GSM (7F20)
transparent 3n (existing) and ADF.USIM linear-fixed X+4 - the new
efDecEccUsim reads the 3-byte Emergency Call Code, the Annex A alpha and
the Emergency Service Category (decoded per TS 24.008 Table 10.5.135d).
EF.AD is registered as DF-keyed entries (7F20 / ADF.USIM / ADF.ISIM),
reusing the existing encoder.
The df is threaded through the file-manager decoded-view/edit/save and
the snapshot/compare decode. No ECC editor yet (read-only).
Frontend 1081 + Python 1090 tests green.
catarrh
8e0a97f025
