Strip decorative padding and borders from terminal review text

[serrebidev]

What

Cleans up the text captured from a Windows Terminal TermControl before it is shown in the review window.

Why

Terminal cells are space-padded to the column width, and TUI apps (Claude Code, htop, editors, etc.) reserve whole rows and columns for borders and status chrome. Captured as a UNIT_STORY, the review fills with runs of blank padding and box-drawing-only lines. Navigating that line by line in the review window means paging past a lot of empty and border-only lines to reach the real content.

How

Adds _cleanTerminalText(), applied to both TermControl captures in obtainUWPWindowText():

• strips per-line trailing whitespace, and
• drops lines whose only non-whitespace characters are Unicode box-drawing glyphs (U+2500–U+257F).

Content lines that merely contain a border character (e.g. │ some text │) are preserved, because the letters and digits inside fall outside that range.

🤖 Generated with Claude Code

[serrebidev]

This PR is the terminal text cleanup — stripping padding and border-only lines from captured terminal text.
Part of a three-PR set that splits a batch of Windows Terminal / command-line review improvements into independent, single-purpose changes. Each is branched off master and touches only addon/globalPlugins/virtualRevision.py, so they can be reviewed and merged in any order (or accepted/rejected independently):

• Fix Virtual Review in modern command-line windows (Windows Terminal) #16 — Fix Virtual Review in modern command-line windows (the core control+NVDA+w fix)
• Add settings panel to toggle UWP review alert beeps #17 — Settings panel to toggle UWP review alert beeps
• Strip decorative padding and borders from terminal review text #18 — Strip decorative padding/borders from terminal review text

Notes for review:

• They edit the same file, so whichever merges first will leave the others needing a trivial rebase — happy to do that on request.
• I deliberately left the addon_version / addon_changelog bump in buildVars.py out: it's date-based and yours to set at release, and three parallel branches would otherwise all conflict on that one line. Tell me the version you'd like and I'll add the changelog entry.
• Verified on NVDA 2026.1 / Windows 11 (Windows Terminal running cmd, PowerShell and WSL, plus a legacy conhost console).

[ragb]

Ported to ragb#5, where maintenance now continues. Credited via Co-Authored-By. Thanks @serrebidev.

[serrebidev]

Ported with credit and merged in the maintained repository as ragb#5. The whitespace-padded border-row edge case found during live verification is addressed in ragb#8. Closing this obsolete PR in the old repository.