[FacuM]

M3 acceptance: three code fixes and the lab acceptance record

Carries the M3 acceptance outcome end to end: the three defects the lab runs confirmed, the acceptance
record that documents what the lab verified, and the XP floor-list lines the fixes need.

Code fixes

• Property sheet buttons are localized (5f6f16c). The wizard and the profile editor are comctl32
  property sheets, so their own OK/Cancel/Back/Next/Finish buttons came from the comctl32 resources, in
  the language of Windows rather than ours. PSH_USECALLBACK plus the new ui_win_sheet_callback gives
  them the catalog texts on PSCB_INITIALIZED; the five new SD_MSG_UI_SHEET_* strings land in all six
  locales.
• The profile editor fits a 1080 px screen at 150 % DPI (3f95100). The sheet is as tall as its
  tallest page (Connection), which pushed the sheet's own OK and Cancel off the screen. The page-template
  height is now capped to the work area minus the sheet chrome, and a page whose content is taller gets a
  vertical scroll bar (ScrollWindowEx moves the children; the bar, the mouse wheel, Tab and the error
  box of a failed apply scroll the hidden controls into view). Pages that fit are untouched.
• The Explorer context menu follows SHELLDRIVE_LANG (269ae73, found in lab run 9). The shell
  extension passed a NULL override to sd_l10n_init and never read the variable, so with
  SHELLDRIVE_LANG=es the menus stayed English while the tray followed Spanish. 03 §9.3 ranks
  SHELLDRIVE_LANG above the user UI language for every catalog-loaded binary, and a shell extension has
  no command line; it now reads the variable like the CLI and the tray app do.
• XP floor lists (4af9caf): the editor fix imports GetWindow, ScrollWindowEx and
  SetScrollInfo; all three are documented from Windows 2000 and are added to the XP SP2/SP3 lists in the
  established round style.

Acceptance record

9c953aa replaces the placeholder in docs/dev/m3-acceptance.md with the Hyper-V lab record
(runs 6–9, 2026-10-30, Windows 10 LTSC 2021 VM, Spanish and German at 150 % DPI):

Verified: wizard driven to the end in Spanish and German; profile "Laboratorio SFTP" created in the
editor and visible under "Ubicaciones de red"; This PC ▸ "Mount with ShellDrive" mounted the drive (tray
"Desmontar Z: (Laboratorio SFTP)", main window "1 unidad montada.", dark mode at 150 %); offline
disconnect/reconnect cycle; unmount from the drive menu. Host-key prompt: no TM-R03 violation — the
agent parked the handshake and stored the key only after the scripted "Confiar y conectar" click, and
later connections verify against the stored fingerprint. Accessibility evidence from the UIA/tab dumps
(names, control ids, tab order, mnemonics, no traps).

Not verified: the host-key prompt dialog itself (self-closes unanswered, see (a)); the Explorer menu
language fix needs a lab re-verification; the WOW64 file-dialog step cannot pass (see (c)).

Open defects (follow-ups):

• (a) The host-key prompt dialog can vanish unanswered ~2 s after appearing (run 8). Agent behaviour
  is correct; the UI-side cause is unidentified and needs a no-answer probe run.
• (b) Status mismatch: tray and main-window status bar reported "1 unidad montada." /
  "Desmontar Z:" while the agent mount state was failed (run 8); the DataGrid row showed "Falló"
  correctly.
• (c) WOW64: the 32-bit common Open dialog reaches This PC, but the Z: drive item is not found by UIA
  in that view (reproduced twice in run 9).

The doc also records the doc skew the harness found: shelldrive hostkey list requires <host[:port]>
in this build while 03 §6.1 documents the host as optional.

Gate

tools/ci-local.ps1 (ctest excludes the matrix|bench|repro labels): all five presets pass —
x64-modern, x64-xp, x86-ia32, x86-sse2, x64-analysis (the x86 dokany.mount skips under WOW64
as expected). The repro label was run separately for x64-modern Release and Debug: 1/1 pass each.
Nothing is merged by this PR.

Follow-up fixes (three more commits)

• fc0fda2 ui: count only mounted drives in the tray and the status bar fixes (b). The tray tooltip,
  tray menu and status bar counted every model entry; they now count mounted or reconnecting drives
  (03 §7.2), and a failed mount gets no Unmount item. Regression test in tests/ui/test_mainview.c.
• ad88527 agent: offer prompts it still holds to a UI that reconnects: the likely cause of run 8's
  self-closing host-key dialog. When the UI's agent pipe is reported down it destroys every prompt dialog
  without answering; the agent keeps the prompt, but subscribe redelivers only queued prompts and
  prompt.list only closed dialogs, so the prompt was lost until the server dropped the connection.
  prompt.list now carries the prompt.request fields (like the service's list) and the UI builds
  dialogs for prompts it does not already show. The agent logs UI client connect, disconnect and
  subscribe at INFO. 03 §2.1 updated; regression test m3_prompt_list_offers_delivered_prompt_again.
• 33889c4 cli: make the host optional in hostkey list resolves the doc skew above. Without a
  host, every key in the machine and user stores is listed with the same JSON shape. Three new strings
  in all six CLI catalogs.

Gate rerun on 33889c4: all five presets pass. One webdav.redirector failure in x64-modern Debug
(redirector_large_file_round_trip: the backend was read before the redirector's PUT landed) is a
pre-existing flake untouched by these commits. It passed 3/3 in isolation, and the x64-modern test
rerun passed 109/109 and 107/107.