[ScriptRaccoon]

This PR fixes #135 by preventing line breaks inside formulas whenever possible. The implementation was done by Claude Code. The changes are best understood by the screenshots below.

The basic idea is to add display: inline-block to all elements with the class katex. As a result, a formula that does not fit into the current line moves to the next line as a whole. This only affects inline formulas, since KaTeX's own rule .katex-display > .katex { display: block } has a higher specificity.

This already fixes most of the line breaks. On smaller viewports, however, many formulas do not fit into a single line, and KaTeX still allows a line break after every binary operator (such as $+$ or $*$). To fix this, line breaks now happen only after relation symbols (such as $=$ or $\subseteq$), unless the part between two relations does not fit into a line by itself. To achieve this, the parts of a formula between two relations are now wrapped in elements with the class formula-group, which also have display: inline-block.

Another line break issue has been fixed as well: punctuation directly after a formula, as in $x$., could start a new line. It is now "glued" to the formula by moving it into the last unbreakable part of the formula, so it can no longer end up alone at the start of the next line.

Screenshots

Before (1)

After (1)

The formula $Hom(1,0) = \{p\}$ does not break anymore:

Before (2)

After (2)

Two formulas do not break anymore.

Before (3)

After (3)

Two formulas do not break anymore.

Before (4)

This shows what happens on smaller viewports.

After (4)

The display formula, that is longer than the whole line, only breaks after the equality sign:

Before (5)

This shows what happens on smaller viewports.

After (5)

The inline formula, that is longer than the whole line, goes to its own line, and only breaks after the equality sign:

Before (6)

After (6)

The period is not isolated anymore: