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* feat(transcript): make tool events readable — diffs, content, terminal output The expanded transcript row printed a tool call's input as raw JSON, so an edit showed `old_string`/`new_string` as escaped one-line literals — the one event type where seeing *what changed* matters most. Tool results kept their JSON string encoding, so every shell result read as a quoted blob with literal `\n`, in the collapsed summary and in Copy all as well as in the body. What each kind of event now renders as: - A replacement reads as a diff. Unchanged runs fold to `⋯` with three lines of context either side, so a one-line change inside a large `old_string` is not buried in text that never moved. - A whole-file write reads as plain content with a line count. There is no before side to compare against, so a `+` on all of it carries no information. - A result is unwrapped once, everywhere it appears. File mutations are identified by the *shape* of the input (`file_path` plus `old_string`/`new_string`, or `content`), never by tool name: the presenter's contract is to keep provider-native names verbatim, and those differ per provider. The write mode keys on `content` rather than on "the before side is empty", because an edit with an empty old_string is an insertion into a file that already exists and still reads as a diff. Highlighting reuses the rich-content engine (`lowlight` and the `.hljs-*` class contract), so a file looks the same in a transcript as it does in a comment, with no new dependency. Each side is highlighted as ONE block and then split at newlines, re-opening the enclosing spans per line — highlighting line by line would break every multi-line string, comment and template literal. Grammar comes from the file extension; an unknown extension stays plain rather than guessing. The hljs palette was scoped to `.rich-text-editor`; it now also covers `.transcript-code`, with no colour definition duplicated. Diffing is a small LCS over lines, degrading to a plain replacement block past 250k cells. Line numbers are deliberately absent: the transcript stores only the tool input, so a snippet's position inside its file is not knowable here, and relative numbers would read as file lines and mislead. * fix(transcript): keep the show-all label off the line it covers The fade overlay does not fully clear the clipped line, so the transparent "Show all" label rendered on top of whatever text sat behind it — the two interleaved character by character and neither was readable. Giving the button an opaque surface separates them. Pre-existing: any tool output long enough to clip hit it. It became routine once whole-file writes started rendering their content.