DankChat v0.6.0

Fixed

• Refresh only the account (and chat) that reported an update instead of every
  account of the service, and bundle bursts of updates from busy groups.
• Serve the Telegram chat list from cache until an update or a write changes it,
  refetching at most every 3 seconds and at least every 5 minutes. Refresh
  failures are now shown instead of silently keeping an outdated list.
• Back off after Telegram refresh failures and respect reported flood waits.
  Concurrent writes and cancelled fetches no longer leave the chat cache clean
  when another refresh is still needed.
• Stop the 2-second account refresh once the window is closed while the account
  view was open.
• Chats beyond the 40 most recent no longer fail with “Select an existing
  Telegram chat first” for a few seconds after sending or deleting.
• Retry automatic read synchronization when a read is still running or fails, so
  messages arriving meanwhile are also marked read on other devices.
• A failed edit request while reconnecting no longer blocks sending until DMS restarts.
• Cache WhatsApp health checks instead of starting wacli doctor and systemctl
  on every refresh.
• Logging out an additional account no longer shows the original account as
  disconnected; the reconnect notice clears after the next action.
• Show accurate errors when sending is busy or more than 10 attachments are chosen.
• An expired WhatsApp QR login is reported as expired on Python 3.10.
• Add missing German translations for service errors and the new controls.

Improved

• Day headings (“Today”, “Yesterday”, date) in conversations and the time of the
  latest activity in the chat list.
• Telegram conversations reload from a local cache that update events clear,
  instead of fetching the history from Telegram every five seconds. Reactions by
  others and read receipts of sent messages update through events.
• Press Up in an empty composer to edit your last message; Escape cancels a reply.
• Add missing tooltips and accessible names to chat action buttons.
• Cleanup removes abandoned partial-download directories older than an hour.

Security and reliability

• Automatic read synchronization in the app window requires the window to be active.
• Ask before opening received documents, including SVG images, externally.
• An attachment whose upload was not confirmed is kept but excluded from the next
  send until it is explicitly included again.
• WhatsApp writes that outlive a request timeout keep sync paused until they finish
  and refresh the conversation when they complete.
• Wait for outstanding WhatsApp writes before logout, shutdown or clearing shared
  temporary files; cancelled writes still waiting their turn are never sent later.
• Previews of sent attachments are stored in the cache directory instead of the
  memory-backed runtime directory, with one shared 256 MB limit for all accounts.
• The receipt webhook only accepts connections from the same user, handles them
  concurrently and times out idle connections.
• Setup verifies wacli against checksums pinned in the repository and installs
  Python dependencies with --require-hashes.
• A restarted service waits for its predecessor instead of exiting silently.
• Ask before removing downloaded media.

Removed

• The unused link-whatsapp and open-link-terminal scripts, which required wacli 0.17.1.

Known limitations

• A dedicated Telegram application ID and shared custom credentials for additional
  accounts are deferred. The inherited Telegram Desktop API credentials remain
  the default in this release.
• CPU, battery and network savings have not been measured. Media players are
  still created when their message delegates load.

Updating

Update DankChat, rerun python3 scripts/setup in its installed folder, and restart DMS when convenient. Accounts and settings are retained; unsent drafts live only in memory.