fix: clip inline blame instead of hiding long metadata

The full-label width check hid current-line attribution when only part of the commit metadata fit. Render into the remaining cells without covering source text; preserve offscreen and no-space guards.

docs/development.md

@@ -91,6 +91,7 @@ Shared-workspace parity checks compare ordinary and resolver diff geometry/conte
 Repository gutter checks cover LF/CRLF normalization, additions/replacements/deletion anchors, staged/disk/unsaved Git text, unborn and missing named files, ignored/unsupported paths, read-only colocated/non-colocated jj queries, stale results and per-buffer isolation, plus rendered modes, colors, current-line precedence, wrap/scroll and narrow/split geometry. Live PTY smoke verifies all four modes, edit/undo refresh, external Git HEAD changes, and jj parent changes without editor restart.
 
 Blame checks cover selected historical commits rather than live HEAD, renamed/deleted paths, unsafe/nonregular sources, Git-backed non-colocated jj, and privately fetched objects surviving comparison/repository teardown until the final snapshot releases them. Render/session regressions cover both split/unified sides, stale side results, wrapping, narrow panes, detached historical tabs, and Working attribution. Live PTY smoke opens both historical sides and unified view after deleting the file from the checkout, observes the correct commit labels, opens a historical tab, and exits with unchanged HEAD and tracked state.
+Partial-label checks navigate short and longer source lines with wide/combining author names and long commit summaries in ordinary, split, and unified views. Live PTY smoke repeats three-line navigation in split/unified views with a long summary, observing attribution on every source line with unchanged source bytes and HEAD.
 
 Normal-picker checks cover staged/disk/unsaved status, binary and mode changes, exact and ambiguous renames, deleted paths, unborn repositories, aliases and unusual filenames, ignores and safe roots, linked worktrees, and read-only colocated/non-colocated/conflicted jj parents. Catalog/render checks retain unchanged rows, query/selection/expansion and Tree/List navigation, clear stale metadata, restore recreated files, and sanitize rename labels. Live PTY smoke checks A/M/D/R colors in floating and docked pickers with the line gutter disabled, Git HEAD/jj parent refresh, and unchanged jj operation state during polling.
 

docs/editing.md

@@ -260,7 +260,7 @@ Text wraps at word boundaries where possible, with grapheme-safe breaks for long
 
 Inline blame is enabled by default in live file buffers and on the focused side of split/unified diffs. The primary caret's line shows its author, commit summary, and short commit ID after the document text; changed or newly inserted tracked-file lines show **Uncommitted**, including unsaved edits. Live Git-backed jj buffers use the working-copy revision's single parent, not a potentially stale Git HEAD. Merge working copies with multiple parents omit live attribution.
 
-Loading happens in the background without network access or changing repository refs/checkouts. Attribution is loaded once for the active buffer's in-memory contents; navigation then selects cached lines immediately, and movement during a cold load does not restart it. Editing, saving, reloading, changing source buffers, regaining terminal focus, or toggling blame invalidates the cached attribution. Historical sides use their captured commit and side-specific path, including renamed or deleted files no longer on disk; historical tabs retain that source and any privately fetched objects after the comparison closes. Frozen Working sides use their captured parent baseline rather than a later checkout. Missing, untracked, unborn, and non-repository live files have no indicator. The indicator is hidden when the caret is offscreen or the full label cannot fit; wrapped lines use their final visible continuation without covering text, selections, or the caret. Popups retain their normal layering.
+Loading happens in the background without network access or changing repository refs/checkouts. Attribution is loaded once for the active buffer's in-memory contents; navigation then selects cached lines immediately, and movement during a cold load does not restart it. Editing, saving, reloading, changing source buffers, regaining terminal focus, or toggling blame invalidates the cached attribution. Historical sides use their captured commit and side-specific path, including renamed or deleted files no longer on disk; historical tabs retain that source and any privately fetched objects after the comparison closes. Frozen Working sides use their captured parent baseline rather than a later checkout. Missing, untracked, unborn, and non-repository live files have no indicator. Long attribution labels clip to the spare cells after the source text instead of disappearing entirely. The indicator is hidden when the caret is offscreen or no inline space remains; wrapped lines use their final visible continuation without covering text, selections, or the caret. Popups retain their normal layering.
 
 Use `:git_blame.toggle`, the palette action, or remappable `config.core.git_blame.toggle`; there is no default keybinding. Set `config.git_blame = false` to disable it at startup. Disabling stops the worker and clears the label without changing text or undo history.