feat(tui): add persistent board filters

[aksOps]

Summary

• add web-parity TUI text and exact AND-label filtering
• keep filtered navigation, detail opening, and mouse hit maps on one visible projection
• persist filter text, labels, and Cancelled visibility atomically per board and user
• add semantic, keyboard, mouse, persistence, failure, narrow-layout, and golden coverage

Verification

• Go coverage: 96.5% total; 95.7% internal/tui
• Go race: all packages passed
• Frontend: 695 tests passed; 98.26% statement coverage
• frontend build, go vet, go format, and diff checks passed

Closes #87

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	golang/​golang.org/​x/​text@​v0.40.0 ⏵ v0.41.0	+1

View full report

[sonarqubecloud]

Quality Gate passed

Issues
15 New issues
0 Accepted issues

Measures
0 Security Hotspots
97.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud