[Darkeox34]

What

Completes 100% export coverage for libSceSigninDialog (7/7 functions):

• Implements sceSigninDialogGetStatus, sceSigninDialogClose, and sceSigninDialogGetResult following the common-dialog state machine (NONE -> INITIALIZED -> RUNNING -> FINISHED), mirroring
  libSceLoginDialog.
• sceSigninDialogGetResult reports COMMON_DIALOG_RESULT_USER_CANCELED (1) once finished, validating null pointer and uninitialized / unfinished states.
• sceSigninDialogClose succeeds when initialized and validates COMMON_DIALOG_ERROR_NOT_INITIALIZED.
• Adds core/libs/prx/libSceSigninDialog/CMakeLists.txt and a complete guest unit test suite in core/libs/tests/GuestSigninDialog.cpp.
• Records libSceSigninDialog in the silent stubs section in docs/dev/TechnicalDebt.md.

Tested

• Validated with python tools/check_conventions.py --base upstream/main.
• Verified 100% export coverage with python tools/progress.py.
• Covered by guest unit test suite GuestSigninDialog.cpp driving initialization, open, update/get status, get result, close, terminate, and argument errors.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed in TechnicalDebt
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• AI-assisted: yes

[Kikoarl]

Tested on Linux (CachyOS x86_64, Intel RPL-S iGPU / Mesa 26.3.0-devel / Vulkan 1.4.363, GCC 16.2.1) at bafdd521:

• Build: Built cleanly in RAM (/tmp/anyps5_build) with zero warnings/errors.
• Conventions: python3 tools/check_conventions.py --base origin/main --head HEAD -> PASS (0 errors).
• Verification: Verified GuestSigninDialog.cpp state machine tests. All transition states cleanly handled following SCE PRX specifications without silent hangs.

LGTM!

[popcoder565]

Native Windows run, since no Windows results were posted. Setup: Windows 10 (19045), MinGW-w64 GCC 15.2.0 (WinLibs r7), Release. Head bafdd521, merged onto main f8c2f07 in one build with 9 other PRs that had no Windows run.

• This PR's tests pass: guest_signin_dialog.
• Full ctest in that build: 512 of 513. The one failure is agc_driver_depth_fast_clear_submit from fix(agc): storage access to a depth surface's stencil plane through its stencil aspect #2325, which fails intermittently on its own too. The test comes from feat(agc): depth planes sampled as 2D arrays, cubes and integer views #425, where I reported it.

No title was run.

🤖 Addressed by Claude Code

[oneandonlydean]

Closing for the same reason as #2309: no title is shown reaching sceSigninDialogGetResult, GetStatus or Close on main, and a silent dialog stub needs a title it unblocks. Please reopen with the title ID and the log line if you find one.