* fix(vscode): restore inline tool diffs
* fix(vscode): render tool patches in kilo ui
* style: format long regex assignments and add change marker comment
Reformat multi-line regex match assignments in kilo-ui-contract test
to satisfy line length limits, and annotate the `contents(diff)` call
in session-diff with a kilocode_change tracking comment.
* fix(kilo-vscode): append trailing newlines to expected diff content assertions
Update test expectations in diff-session-source to include trailing
newlines in before/after content, matching actual file content behavior.
* fix(vscode): guard empty-patch diffs in session turn accordion
Match diff-session-source.ts:99 behavior by short-circuiting contents()
when the patch is empty (binary or summarized files), so the accordion
content stays empty instead of rendering a confusing whitespace-only
diff.
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Co-authored-by: Imanol Maiztegui <imanol.mzd@gmail.com>
