fix: study-mode checkbox wasn't visible or bound (wrong RmlUi flow)rewrite

The checkbox used data-value (binds the element's 'value' string attribute)
instead of data-checked (binds the 'checked' bool state) -- per RmlUi docs,
checkboxes must use data-checked with a bool. So it neither reflected nor
toggled study_mode, and with no explicit styling it rendered invisibly.

Fix: wrap the input in a <form> (canonical RmlUi form-control flow), switch
data-value -> data-checked, and give #cb-study an explicit visible style
(border + background, green fill when :checked). Verified the document loads
with no RmlUi parse errors.

Note: RmlUi's border shorthand is 'width color' (no 'solid' keyword).

0 files changed, 0 insertions, 0 deletions