Fix theoretical crash on read event on overlay tab

I am not sure how this could happen in practice but a user has had
this panic.

Thanks to one-star-chef for finding the issue.

Fix incorrect cursor position when editing mutli-line text

Thanks to valr for finding the issue.

Fixes: https://todo.sr.ht/~delthas/senpai/199

Defer unimportant caps until CAP LS response

This keeps our conn-reg 0-RTT but introduces a theoretical race
condition on these CAPs (e.g. if we receive a SETNAME right after
conn-reg).

This helps us go below 20 messages for our conn-reg batch, which
is the default limit on solanum and the one used by Libera.

Fixes: https://todo.sr.ht/~delthas/senpai/200

doc: Mention system package repositories

Bump dependencies

Improve color contrast of status text by blending fg and bg to RGB

Fixes: https://todo.sr.ht/~delthas/senpai/198

Fix chat history fetch loop for targets containing uppercase chars

We would previously flood the server with CHATHISTORY BEFORE on
channels with mixed case.

Fix duplicate direct messages in rare cases

Fix retrying connection after App exits

Thanks to Antonio Mika <me@antoniomika.me> for helping me find
this issue.

This leaves a possible theoretical race condition, but should not
really happen in practice and can only be properly fixed by
refactoring existing code to use contexts.

doc: Clarify password-cmd

Clean up goroutines after App closes

Co-authored-by: Antonio Mika <me@antoniomika.me>

Allow passing in console to vaxis

Update documentation

Add "colors nicks self" to set own nick color only

Fixes: https://todo.sr.ht/~delthas/senpai/195

Add workaround support for RGB colors on Windows Terminal

Fix sending invalid trailing semicolon in tags

See: https://github.com/progval/matrix2051/issues/77

Work around broken Associated Text on iTerm2

See: https://gitlab.com/gnachman/iterm2/-/issues/12177

Use alternative gray color on color schemes with bg == gray

With these heuristics, "gray" text should always be readable
regardless of the theme, even for 8-color themes.

Fixes: https://todo.sr.ht/~delthas/senpai/160

Always show the message time after a message date

This can help know at which specific time a long discussion
happened.

Thanks to ~sethkush for the feature request.

Fixes: https://todo.sr.ht/~delthas/senpai/179

Bump vaxis

This fixes restoring the cursor shape on exit.

See: https://todo.sr.ht/~delthas/senpai/164