`ctrl+o` in the focused main view copies the selection to the clipboard,
mirroring the staging view's copy. Unlike stage / discard, copying is the same
for every diff panel — it just reads the text shown — so it's a direct
MainViewController command rather than a FocusedMainViewActions method. That
keeps it free of per-panel duplication and lets it work over panels that have
no actions, notably the reflog.
The +/- prefix handling is metadata-aware where it matters: with no pager the
main view shows the raw diff, so a homogeneous selection has its +/-/space
column stripped (dropDiffPrefix) to ease pasting into code. With a pager
configured the rendered lines carry no such column, so stripping a leading
character would eat real content — copy verbatim instead. (Refining the raw
case to classify header lines via the diff-line metadata, fixing the
'--- a/file' edge case noted in 159bbb0825, is left for later.)
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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