fix(packet_decoder): brute-force channel resolution when hash lookup fails
ChannelCrypto.calculate_channel_hash() and the MeshCore firmware compute
different channel identifiers for the same secret, causing _hash_to_idx to
return None for all hashtag-channel messages. Fallback: try each registered
key individually via a single-key keystore. First valid decryption wins.
Result cached in _hash_to_idx for O(1) resolution on subsequent packets.
fix(events): channel-agnostic sentinel prevents cross-channel duplicates
on_rx_log now marks '*' in DualDeduplicator after storing a message.
on_channel_msg checks this sentinel and suppresses storage regardless of
channel_idx or message_hash differences between the two library systems.
Fixes #mc-radar messages appearing in #weather and vice versa.
fix(events): secondary path-cache keyed by content for hash-mismatch
_path_cache keyed by meshcoredecoder hash; CHANNEL_MSG_RECV carries meshcore
hash (different value). Added _path_cache_by_content ("sender:text[:100]")
as fallback so path_hashes are recovered when the two hashes disagree.
fix(commands,cache): remove stale channel key after del_channel reindex
Cache entry for old_idx not removed after slot move, causing same channel
to appear twice. New DeviceCache.remove_channel_key(idx) called after each
move. asyncio.sleep(0.5) added before re-discovery to let device settle.
feat(channel_panel,commands,dashboard): channel edit — move/reindex support
First channel-edit capability in the GUI. New '↕️ Move / Reindex' mode in
Channel Manager dialog. Source channel selected from dropdown, target index
in number field. ↕ button inline with 🗑 in Messages and Archive submenus.
_cmd_move_channel reads secret from cache or device, writes new slot, clears
old slot, updates cache atomically, triggers re-discovery with settle delay.
WHAT: New ＋ Add Channel button in the Messages submenu opens a dialog
supporting three modes — Hashtag (key derived from name), Private New
(random key + QR export), Private Existing (paste hex key).
WHY: Channels could only be added via firmware/external tools. The new
dialog covers all user scenarios without changing the BLE worker or
existing panels.
NOTES: Requires `qrcode[pil]` for QR rendering (graceful degradation if
absent). Channel re-discovery is triggered automatically on success.
_abbrev_table used a list comprehension inline inside a generator
expression filter. In Python 3, list comprehensions have their own
scope, so the loop variable 'cu' was not visible to the outer 'if'
condition — causing a NameError on every !h / !help DM command.
Extract the comprehension to a local variable 'cats_upper' so both
the iteration and the filter operate on the same pre-built list.
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