25868: sql: Log event for TRUNCATE TABLE r=a-robinson a=a-robinson

Fixes #25867

Release note (sql change): TRUNCATE TABLE commands are now logged in the
event log.

25871: ui: unbreak `make watch` r=vilterp a=vilterp

By telling Webpack to proxy the path `/` through to the Cockroach process.
Webpack used to serve `/` itself from a static file, but as of #25195 we
generate `/` dynamically in Go, so we can use it to pass login state to
the UI.

Fixes #25858

Release note: None

25875: ui: fix action names broken by #25823 r=couchand a=couchand

In that PR, I mechanically replaced identifiers when there were new
warnings about shadowing, but in two places I accidentally changed
semantics due to the shorthand form of object literals.  🤦‍♂️

Release note: None

Co-authored-by: Alex Robinson <alexdwanerobinson@gmail.com>
Co-authored-by: Pete Vilter <vilterp@cockroachlabs.com>
Co-authored-by: Andrew Couch <andrew@cockroachlabs.com>