suppress bold rendering in terminal to keep cell grid stable

Flutter falls back to synthetic bold when JetBrainsMono-Bold isn't
registered, and synthetic bold drifts glyph advance widths enough
to break the monospace cell grid (cursor block lands between
characters, prompts wrap mid-word). Color is enough to convey
emphasis in TUIs; semantic italic and underline still render.

Also drop the temporary `tmux -L clide kill-server` from the
install target — the rapid-iteration loop is no longer needed.

Co-Authored-By: Claude <noreply@anthropic.com>

lib/src/terminal/src/ui/painter.dart

@@ -190,9 +190,12 @@ class TerminalPainter {
         color = color.withOpacity(0.5);
       }
 
+      // Skip bold rendering — Flutter's synthetic bold (no Bold.ttf
+      // registered) drifts glyph advance widths slightly, breaking
+      // the cell grid. Color is enough to convey emphasis in TUIs.
       final style = _textStyle.toTextStyle(
         color: color,
-        bold: cellFlags & CellFlags.bold != 0,
+        bold: false,
         italic: cellFlags & CellFlags.italic != 0,
         underline: cellFlags & CellFlags.underline != 0,
       );