TUI: reintroduce safe mouse profile selection

[rmanibus]

Summary

• reintroduce mouse support in a narrow, safe form for the TUI
• support SGR left-click selection in the profile list only
• keep keyboard navigation intact and avoid wheel/action-click behavior for now

Testing

• env GOCACHE=/tmp/cloudstic-gocache go test -count=1 ./cmd/cloudstic ./internal/tui
• env GOCACHE=/tmp/cloudstic-gocache GOLANGCI_LINT_CACHE=/tmp/cloudstic-golangci-lint golangci-lint run ./cmd/cloudstic ./internal/tui

Closes #220

[codecov]

Codecov Report

❌ Patch coverage is 57.14286% with 30 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cmd/cloudstic/cmd_tui_input.go	45.09%	19 Missing and 9 partials ⚠️
cmd/cloudstic/tui_runtime.go	83.33%	2 Missing ⚠️

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