Krux

test: build embit's C libsecp256k1 for tests

Without it embit falls back to its pure Python EC implementation, which does
not always behave like the C library the firmware runs: firmware.bin.bad.sig
raises while parsing instead of failing verification, so the Bad signature
branch in firmware.py was never exercised. Adds poe tasks to build and to
check the active backend, wired into CI, which now fails on the fallback.

Full suite goes from 118s to 84s.

fix(test): fake the clock in test_fill_flash timeout test

test_fill_flash_insufficient_entropy_scenario waited 25 real seconds for
MAX_CAPTURE_PERIOD to elapse, spinning ~500k iterations that piled up mock
call records. Patching time.time in fill_flash fires the timeout after 4
frames: 25.1s to 0.09s, same coverage.

docs: document generated mnemonic actions

test: cover generated mnemonic action flow

refactor: extract wallet info menu helper

docs: add generated mnemonic flow screenshots

chore(i18n): update generated mnemonic action translations

feat: simplify generated mnemonic actions

chore(Embit): bump to fff7ffa

docs(parts): mark Maix Amigo as discontinued, drop sale links

chore: remove unused color constants

This commit removes two constants on `src/krux/themes.py` once the
`vulture` tool found with a 60% of confidence their possibility to be a
dead code.

Fix #900

Co-authored-by: Naman Gupta <55298452+Naman015@users.noreply.github.com>

docs(parts): mark Maix Amigo as discontinued, drop sale links

chore: update cUR and k_quirk

fix: pin gcc base image by digest

fix: add src to poe task PYTHONPATH

Ensure poe-launched commands can import the local krux package under uv, where the project itself is not installed as a package.

refactor: narrow mnemonic storage file-load errors

The four read/load fallbacks in MnemonicStorage caught everything with a
bare `except:`, hiding unexpected errors (and on the K210 even
KeyboardInterrupt/MemoryError). Narrow them to the file/JSON errors they
actually expect -- (OSError, ValueError) -- matching the OSError
convention already used in sd_card.py. Behaviour for a missing/unreadable
file or malformed JSON is unchanged (storage starts empty / first store
still writes); a genuinely unexpected error now propagates instead of
hiding.

The decrypt and write catches stay broad on purpose (wrong-key /
failed-save contracts) and are now commented as such.

fix: preserve corrupt seeds.json instead of overwriting on store

store_encrypted_kef raises StorageCorruptedError and leaves the file
untouched when an existing seeds.json is malformed or a non-dict, rather
than silently overwriting recoverable data. list_mnemonics returns [] for
non-dict storage so corrupt files no longer crash the menu; the UI reports
the corruption (English-only) and skips the store.

fix: return None when decrypting an unknown or non-dict mnemonic id

MnemonicStorage.decrypt() resolved the id inside a try/except but then
called stored_value.get("b64_kef") outside it, so an unknown id (where
storage.get returns None) raised AttributeError instead of returning None.
A malformed seeds.json that parses to a non-dict (e.g. a JSON list) hit the
same path. Resolve the source dict and return None when the id is missing
or the stored entry isn't a dict -- no bare except, behaviour now tested.

The sole caller wraps the call in try/except, so this changes no on-device
behaviour; it gives decrypt() a clean return contract.

refactor: drop non-dict JSON coercion in encryption storage

Loading seeds.json no longer coerces valid-but-non-dict JSON to an
empty dict, so a wrong-shape file is preserved instead of being
silently overwritten on the next store. decrypt() keeps the
isinstance(source, dict) guard that prevents a crash on such files.

fix: improve default theme contrast (#879)

refactor: cache Settings() namespace tree as a singleton

Avoids rebuilding ~16 namespace objects on every Settings() call;
values are still read live from the store singleton.

Reset the cache in mock_retro_compatibility so the patched
DefaultWallet is picked up.

refactor: dedupe flipped-orientation check in touch.py via is_flipped_orientation

feat: replace `poetry` to `uv` as venv manager

This commit replaces the current virtualenv manager to `uv`. It's a
battle tested one and well accepted by community. It do not changes the
current behaviour of `poe` tasks, instead, we noted a faster run with
this manager.

docs: update `poetry` to `uv commands

chore: update `poetry` to `uv` commands.