tinyedit v0.3.6 — Safer saving, more reliable editing, and faster redraws

tinyedit v0.3.6 — Safer saving, more reliable editing, and faster redraws

This release improves document safety, Unicode editing, search, and responsiveness
on larger files. It remains a plain C/POSIX terminal editor with no new external
dependencies.

These notes cover the cumulative changes from v0.3.3 to v0.3.6, including
features shipped in v0.3.4 and the strict UTF-8 improvements from the v0.3.5 tag,
which had no separate GitHub release. The fixes and performance improvements
below complete that upgrade path.

New since v0.3.3: menus, terminal behavior, and editing features

The following features were introduced in v0.3.4 and are included in v0.3.6:

• Persistent TinyEdit, File, Edit, View, and Help menus, accessible through F10
  or the mouse.
• View-menu switches for line numbers, the top bar, the menu bar, invisible
  characters, syntax highlighting, and automatic indentation of new lines.
• Matching-bracket highlighting for existing and pasted text, not only pairs
  inserted automatically.
• Automatic closing tags for XML/HTML, leaving the cursor between the tags;
  self-closing tags and HTML void elements are handled appropriately.
• A configurable cursor scroll margin that keeps surrounding text visible
  while navigating.
• Alternate-screen support: exiting restores the shell prompt and scrollback.
  Cleanup also restores raw mode, mouse reporting, bracketed paste, keyboard
  protocol state, and cursor appearance.
• Improved mouse menu navigation and hover selection, restored click reporting
  after menus close, and corrected background restoration below the menu bar.
• Ghostty input fixes for Command shortcuts (including select all), Shift-click
  selection, and Shift-Tab handling. Command-key integration remains optional
  and experimental.
• Fixed path-resolution buffer overflows when identifying files and backups.

Safer opening and saving

• Failed loads preserve the current document instead of leaving partially loaded text.
• Saves use atomic file replacement and check file and directory synchronization.
  If durability cannot be confirmed, tinyedit reports the problem and retains its
  modified state and recovery copies.
• Save as adopts the new filename only after a confirmed successful save.
• Open and Save as accept home-relative paths such as ~/tmp/notes.md.
• Settings and recovery writes use the shared persistence helpers, with improved
  handling of read, write, close, and path-resolution errors.

More reliable editing and navigation

• Fixed Page Up/Page Down crashes on empty documents and upward movement at the
  beginning of a file.
• Fixed prompt-buffer growth for long typed or pasted filenames and search queries,
  and clipping of long filenames in the top bar.
• Fixed wrapping in very narrow viewports and tab alignment after Unicode text.
• Backspace deletes a whole UTF-8 grapheme in one operation, including composed emoji.
• Pair insertion, selection wrapping, indentation, and compound replacements have
  explicit undo boundaries. Undoing an automatically inserted pair preserves the
  text typed before it.
• Fixed selection replacement when auto-close options are disabled.
• Mouse bursts preserve the next keyboard event; drag state is cleared across
  document changes and mouse menu actions follow the same command routing as keys.

Markdown, search, and Unicode

• Markdown math blocks delimited by $ or $$ on dedicated lines are highlighted
  completely, including delimiters and content across blank lines. Only a matching
  delimiter closes the block; fenced code remains code.
• Regex navigation reuses compiled expressions and multiline search text, refreshing
  the text cache after edits and undo/redo.
• Improved backward regex matching and fixed multiline anchors after newlines and
  zero-width searches beyond the document end.
• Strict bounded UTF-8 decoding rejects malformed sequences without reading past
  buffers. Editing and rendering preserve the original malformed bytes for saving.
• Added a shipped JSON syntax configuration, installable with make install-syntax.

Faster redraws and better verification

• Wrapped rendering locates the first visible segment once, then draws sequentially.
• Character counts and matching-bracket results are cached and invalidated when
  their inputs change; frame output buffers grow geometrically.
• In a local CPU-only benchmark with 50,000 rows, row drawing dropped from about
  6.09 ms to 0.10 ms. This measures frame construction, not terminal I/O; results
  depend on the machine and document.
• Expanded core, pseudo-terminal, persistence fault-injection, search, and rendering
  regression coverage, plus a reproducible make benchmark target.
• Updated module documentation; benchmark methodology and remaining limits are
  documented in tests/README.md on the current development branch.

Upgrade and known limits

Build with make. Install the supplied syntax definitions separately with
make install-syntax; existing user definitions are preserved. Restart a running
editor to use the new binary.

Undo still stores complete document snapshots. Large files combined with a deep
history can use substantial memory; the default history depth is 200. Some
position conversions and the first matching-bracket scan remain linear in document
size. Saving a mixed-line-ending file uses one document-wide ending style rather
than preserving each original row's terminator individually.

Full changes since v0.3.3:
v0.3.3...v0.3.6

Changes since the previous published release (v0.3.4):
v0.3.4...v0.3.6

Changes since the v0.3.5 tag:
v0.3.5...v0.3.6