* Re-pin reflex-base to the 0.9.7 prerelease series (>= 0.9.7a1)

reflex-components-core (rx.upload) and reflex-components-radix
(rx.segmented_control) now call ArrayVar.map, added in reflex-base 0.9.7
(#6701), so raise their floors to reflex-base >= 0.9.7a1. The alpha lower
bound matches the whole 0.9.7 prerelease series (a/b/rc) and the eventual
final 0.9.7, so a reflex-base 0.9.7a1 prerelease can be published first and
this change's min-deps check resolves green against it. The root reflex
floor is bumped too for source accuracy — the publish workflow rewrites it
to reflex-base == <version> when building reflex.

Second wave of the two-wave release flow (materialize -> publish base ->
re-pin), matching #6680 for the 0.9.6 cycle. An alpha pin is not rejected by
the check-dev-pins publish gate (only *.dev pins are), so the dependents can
also be cut as 0.9.7 prereleases. min-deps stays red until reflex-base
0.9.7a1 is published to PyPI.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KX93fjAHfXYH4UpbSmaSon

* Re-pin reflex-base to released 0.9.7

Now that the 0.9.7 line is being cut, pin reflex-components-core,
reflex-components-radix, and root reflex to reflex-base >= 0.9.7 for the
final release, superseding the >= 0.9.7a1 prerelease bound that was used to
build the 0.9.7 prereleases from the tagged commit.

The min-deps check resolves from PyPI with --no-sources, so this stays red
until reflex-base 0.9.7 (final) is published to PyPI.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KX93fjAHfXYH4UpbSmaSon

---------

Co-authored-by: Claude <noreply@anthropic.com>