scp81: RAM install over HTTP OTA (v2.1.8)

- shared _cap_apdu_sequence helper (INSTALL [for load] -> 240-byte LOAD
  blocks -> INSTALL [for install]); the SCP80 /api/ram-install path now uses
  it too (one source of truth; byte-level tests pin the APDUs)
- POST /api/scp81/ram-install: parses the .cap server-side and queues the
  APDU sequence as the SCP81 command script (one C-APDU per POST, runs on the
  card's next push); refused while a script is mid-run unless force
- /api/scp81/script reports the script kind (explore/none/custom/ram-install)
- tab: RAM install row (CAP file + SD AID + Queue button); RU strings
- docs: api.md, findings, AGENTS; service worker v145

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pysim-otaman-server"
-version = "2.1.7"
+version = "2.1.8"
 description = "HTTP REST server wrapping pysim for the OTAMan PWA"
 requires-python = ">=3.8"
 # pysim is a git-only dependency installed explicitly by setup.bat/setup.sh.