⚡ Bolt: Optimize treeview clearing using tuple unpacking

[inherent-vice]

💡 What: Refactored for item in tree.get_children(): tree.delete(item) across desktop_tabs/ to use tree.delete(*tree.get_children()) and added explanatory comments.
🎯 Why: Iterating over items and calling delete incurs a large overhead due to multiple boundary crossings between Python and Tcl. Batch deletion resolves this in a single operation.
📊 Impact: Reduces Tcl boundary crossings from $O(N)$ to $O(1)$ when clearing any Treeview. This is specifically visible and impactful for large lists like directory listings, active windows, and results datasets.
🔬 Measurement: Verify by executing python scripts/manifest_consistency_check.py --no-screenshot-check and monitoring performance during UI refreshes under load.

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PR created automatically by Jules for task 1567368880837209002 started by @agno7766

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 993acdcf-3b70-47e0-943a-abf48e880fd7

📥 Commits

Reviewing files that changed from the base of the PR and between b18dfb2 and f97eb91.

📒 Files selected for processing (10)

• .jules/bolt.md
• desktop_tabs/approval_tab.py
• desktop_tabs/couponcheck_tab.py
• desktop_tabs/excel_actions.py
• desktop_tabs/excel_instance_actions.py
• desktop_tabs/layout_actions.py
• desktop_tabs/layout_canvas_render.py
• desktop_tabs/mstsc_tab.py
• desktop_tabs/ops_cockpit_tab.py
• desktop_tabs/quicksearch_tab.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-optimize-treeview-clear-1567368880837209002

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