## Why
Transcript selections were copied as plain text, losing the formatting of rendered Markdown when pasted.
## What changed
- Retain semantic Markdown annotations through rendering, wrapping, and streaming, then serialize selected text with balanced markup.
- Preserve inline formatting, web links, headings, lists, blockquotes, and hard breaks in Markdown clipboard payloads.
- Keep code-only and other literal-only selections as plain text. In mixed selections, escape user prose and fence code, tables, and tool output to preserve their literal content.
## Testing
Add unit tests and Markdown/HTML snapshots covering partial selections, nested containers, escaping, links, resize stability, and streaming boundaries.
GitOrigin-RevId: f0476334a6bf8ad0fb57626627bd258443540852
## What changed
Add `tui.rendering.mermaid`, `tui.rendering.math`, and `tui.rendering.tables`, all enabled by default and independent of animation settings. Disable individual renderers to display their source instead of diagrams, Unicode math, or formatted tables.
Apply preferences to streaming and completed responses, startup previews, and session changes. When table rendering is disabled, preserve pipe syntax, cell markup, and enclosing Markdown fences. Keep HTML clipboard formatting independent of terminal rendering preferences.
## Testing
Add coverage for individual defaults, source preservation, nested table fences, session settings, and clipboard behavior. Verify incremental rendering and emitted output match completed rendering across all eight toggle combinations.
GitOrigin-RevId: 48d765eac20a82881eed94f186bf5b025ff4f0db
## Why
The streaming TUI rerendered the entire mutable Markdown block whenever a
newline-bearing delta arrived. For long fenced code blocks, this repeatedly
parsed and syntax-highlighted the growing fence.
## What changed
- Detect open, top-level, language-tagged code fences and append newly
completed lines directly to the existing render.
- Preserve Syntect parser state across appended lines so multiline syntax and
the active theme remain consistent.
- Fall back to the canonical Markdown renderer for ambiguous fence syntax,
theme changes, incomplete lines, and highlighting limit transitions.
## Testing
Added coverage that compares streamed output with full renders across syntax
styles, Unicode, links, blank lines, fence variants, theme changes, and
highlighting limits. A long-fence test also verifies that the rendered prefix
is retained as new lines arrive.
GitOrigin-RevId: 036db2b7bc93607083b8001f8b4fa3cbb58c713e
Felipe Coury