Fixed(terminal-view): Draw text to the left of a sixel image on the same row

[dsvarela]

Follows #2973, cc @MatanZ.

In TerminalRenderer.render(), the branch for image cells discarded the pending text run, so text before an image on the same row was never drawn.
The change has four parts.

• It draws the pending run before the image cell, with the guard and arguments of the normal style-change path.
• It starts the next run at the cell after the image. column is already incremented at that point, so column + 1 started it one column late.
• It advances currentCharIndex before it records lastRunStartIndex. The start index of the next run then matches its start column.
• It resets lastRunInsideSelection with the other run state.

Testing

Tested on a Samsung SM-X806B with Android 16. The APK is a debug build of this branch (8629e63 plus this commit) from GitHub Actions on my fork. Only versionCode was changed for it, so that it installs over my existing build.
I ran:

printf 'LEFT '; magick -size 128x64 gradient:red-blue sixel:-; echo

• Before (master): LEFT is drawn for a moment and disappears when the image appears.
  

• After (this branch): LEFT stays on screen, with the image to its right at the same position as before.