Ctrl+Plus/Minus/0 text zoom (5% steps, 60%–200%) via MediaQuery
textScaler. App-wide clideLineHeight (1.25) applied in DefaultTextStyle.
Context panel drag resize was inverted — dragging left shrank the
panel instead of growing it. Negate delta for right-anchored slots.
Default sidebar widened from 240px to 400px, context panel from 280px
to 420px (both at their previous maximums).
Co-Authored-By: Claude <noreply@anthropic.com>