[falbany]

Closes #50 — complete removal of the deprecated Tkinter layer. The web frontend (React PWA + profiles.server FastAPI + profiles.desktop PyWebView shell) is the only UI.

Code

• ✅ src/profiles/gui/ deleted (15 modules)
• ✅ app.py: _run_gui(), --tkinter flag + routing, deprecation banners, gui_backend param, TYPE_CHECKING import, _window attr, stale docstrings — gone. run() routes headless → server-only → web GUI unconditionally
• ✅ tests/test_app_no_tkinter.py: deleted (the "keep-or-slim" option B) — its unique subject, the tkinter-unavailable ImportError path in _run_gui, no longer exists. The web-only routing assertions it carried live on in TestRun: new test_run_routes_to_web_gui (the "variant asserting web-only behavior") and test_launch_web_backend_calls_desktop (folded in from test_app_backend_selection.py, which is deleted too — backend selection ceased to exist; default-kwargs coverage stays in TestMain)

Tests

• ✅ tests/gui/ (13 files) and tests/test_app_tk_lifecycle.py deleted

Packaging

• ✅ sv-ttk + darkdetect out of both dev lists and uv.lock; briefcase comment updated
• ✅ Guard test test_tk_deps_present_in_both_dev_lists → test_tk_deps_absent_from_dev_lists (absence pinned instead of presence); test_tk_deps_absent_from_runtime_dependencies and test_briefcase_requires_runtime_complete_and_tk_free kept as-is
• ✅ .coveragerc: profiles/gui omit block removed

Docs (also done here, not left to a follow-up)

• AGENTS.md + core/AGENTS.md + tests/AGENTS.md + tests/README.md synced (mandated same-commit by the keep-in-sync rule)
• README.en/fr: Legacy Tkinter Mode sections + tree entries + TOC anchors removed
• docs/README.md, installation-guide.en/fr: command tables, --help blocks, dependency lists, Linux troubleshooting (now PyWebView/WebKit only)
• hooks-guide.en/fr: legacy-Tkinter render bullets removed; configuration-profile.en: theme no longer claims darkdetect system detection (web resolves auto → dark)

Deliberate scope decisions (flagging for review)

1. --web removed together with --tkinter. Not in the issue checklist, but the issue also rules out the gui_backend param — which orphans --web (it existed only to select between two backends). Keeping it as an accepted-but-ignored flag would be dead code; 0.11.0 is already the breaking release. One-line revert if you'd rather keep it.
2. test_app_backend_selection.py deleted, its desktop-launch test moved into TestRun (single-test supplement file named after a vanished feature).
3. core/environment/interactions.py / message_dialog.py keep their lazy import tkinter fallbacks — untouched, as they belong to the gui-adjacent legacy hook engine whose fate is decided in the dead-code sweep (Dead code sweep (Python): legacy phase-based hook engine, tests-only helpers, unused --no-config-propose flag #39). Same for the "Extracted from profiles.gui.main_window" provenance docstrings.

Deferred to their own issues (unchanged here)

• Dead code unlocked by this removal (telemetry gui-only event helpers, apply_source_to_logger, directory_exists, hash_file, AppConfig.skip_config_prompt, legacy hook engine) → Dead code sweep (Python): legacy phase-based hook engine, tests-only helpers, unused --no-config-propose flag #39
• Web i18n catalog source (gui/i18n.py) is now deleted → Web i18n: port the gui/i18n.py EN/FR catalog or remove the vestigial language toggle #49 must decide port-vs-remove with the catalog gone

Verification

• ruff format --check . + ruff check .: clean
• pylint src/profiles: 9.87/10 (gate 8.0; R0401 warnings pre-existing Cyclic imports between app/desktop/server/core flagged by pylint (R0401) #42)
• pytest: 1490 passed, 1 skipped (pre-existing macOS Finder probe), coverage 88.92% (gate 85%)
• CLI smoke: --help shows no --tkinter/--web; import profiles.app clean
• pre-commit hooks green on both commits