cli: rework +ssh-cache internals and user interface
This change primarily focused on a revised +ssh-cache user interface,
but it also reworks a bunch of the internals.
The primary CLI improvement is support for positional arguments and a
consistent list output format that includes both the ISO-formatted
timestamp and relative age.
ghostty +ssh-cache # List all cached destinations
ghostty +ssh-cache user@example.com # Show that destination
ghostty +ssh-cache example.com # Show all users on that host
ghostty +ssh-cache --add=user@example.com # Manually add a destination
ghostty +ssh-cache --remove=user@example.com # Remove a destination
ghostty +ssh-cache --prune=30d # Remove entries older than 30 days
ghostty +ssh-cache --clear # Clear entire cache
Notable, we now support a --prune operation that replaces the previous
--expire-days flag that was never actually hooked up to anything (!!).
--prune also supports a wider range of Duration-based values.
We're also much more consistent with error codes: 0=success, 1=failure,
2=usage.
While working on those changes, I also reworked the cache internals,
particularly the code around timestamp handling and errors. For example,
I dropped the explicit error sets because they were growing unwieldy,
and in practice we only matched on a subset of those errors.
Lastly, overall test coverage should be much improved, especially around
the time- and allocation-related operations.
input: extract mouse encoding to a pure, testable file
Move mouse event encoding logic from Surface.zig into a new
input/mouse_encode.zig file.
The new file encapsulates event filtering (shouldReport),
button code computation, viewport bounds checking, motion
deduplication, and all five wire formats (X10, UTF-8, SGR,
urxvt, SGR-pixels). This makes the encoding independently
testable and adds unit tests covering each format and edge
case.
Additionally, Surface `mouseReport` can no longer fail, since the only
failure mode is no buffer space which should be impossible. Updated
the signature to remove the error set.
ptr.pet