UI/UX: /update command lacks visual feedback during long-running operations

[larock22]

Problem

Users report that running /update appears to "never update" - the UI shows a static message with no visual feedback during operations that can take 5-120 seconds. The update does eventually complete, but the lack of progress indication makes users think the process is frozen.

Root Cause Analysis

The /update command has two long-running operations with minimal visual feedback:

Operation	Duration	Current Feedback	Issue
PyPI Check	0-10 seconds	Static text "Checking for updates..."	Appears frozen
Package Installation	5-120 seconds	Static text "Installing with {manager}..."	Appears frozen

Key Gaps

1. No LoadingIndicator: The app HAS a LoadingIndicator widget (app.py:161) used by agent requests, but it's NOT activated during update operations
2. No viewport state: The #viewport.streaming CSS class (used by agent requests for active state) is not applied
3. No status bar update: Status bar doesn't show "running: update" during installation
4. Hidden subprocess output: subprocess.run() with capture_output=True hides ALL package manager progress output from users
5. No cancellation: Once installation starts, there's no way for users to cancel

Comparison with Other Commands

Feature	/update	Agent Request	/compact
LoadingIndicator	❌ No	✅ Yes	❌ No
Viewport outline	❌ No	✅ streaming	❌ No
Status bar "running: X"	❌ No	✅ Yes	❌ No
Resource bar label	❌ No	✅ Tokens	✅ Compacting

Relevant Code Locations

• src/tunacode/ui/commands/update.py:70-130 - Main update logic
• src/tunacode/ui/app.py:161 - LoadingIndicator widget
• src/tunacode/ui/app.py:241-242 - Loading pattern (used by agent requests)
• src/tunacode/ui/widgets/resource_bar.py:71-75 - Compaction status pattern
• src/tunacode/configuration/paths.py:123-157 - PyPI version check

Proposed Solutions

Priority 1: Immediate Visual Feedback

• Activate LoadingIndicator during PyPI check and installation
• Add viewport streaming state during active operations
• Update status bar to show "running: update"

Priority 2: Enhanced Progress Indicators

• Add "Updating..." label to ResourceBar (similar to "Compacting..." pattern)
• Add intermediate status messages ("Contacting PyPI...", "Downloading packages...")

Priority 3: Advanced Progress

• Stream subprocess output to chat container for real-time package manager progress
• Add cancellation support for the update worker

Environment

• Timeout constants: PyPI check = 10s, Installation = 120s
• Package managers supported: uv, pipx, pip
• PyPI endpoint: https://pypi.org/pypi/tunacode-cli/json