Injects a hover-revealed copy button into every <pre><code> block
site-wide via a single layout partial, reading textContent so escaped
samples copy as literal text. Ships copy/check icons and matching Sass.
Passes icon markup to JS via <template> elements instead of Twig's
|escape('js'), which calls mb_ord() and fatals without mbstring — same
class of bug as the existing |slice/mb_substr gotcha, now documented in
AGENTS.md.
Closes the "Copy-to-clipboard button on code blocks" backlog item in
novaconium/ISSUES.md.
Full rewrite: swap out the v1 framework (src/, controllers/, views/,
twig/, sass/, skeleton/) for the working v2 codebase from phpproject
(App/, novaconium/, public/).
code