fix: improvements to agent simulation UI from 1.7 release

[mhordynski]

• Scenario "Reservation management flow" not works - @pskwiercz
• Scenario “Warsaw Budget Room Multi-Night Booking” not works - @pskwiercz
• UI rerun should automatically do a rerun of the same job @mkoruszowic
• UI proper percentage value in "Runs" view @mkoruszowic
• UI auto scroll for conversation @mkoruszowic
• UI refreshing/updating "Metrics" tab according to the progress visible in the subtab @mkoruszowic
• remove logging to CLI @mkoruszowic
• UI fix disappearing scenarios in run sidebar after completion (esp. failing ones) @mkoruszowic
• UI fix wrong scenario counts in "Runs" view after experiment finishes (0/0 or partial) @mkoruszowic
• UI fix "All Scenarios" filter in "Runs" view to deselect others when clicked @mkoruszowic
• UI fix response chunk display (user messages, metadata, off-by-one turn) @mkoruszowic
• UI metric tooltips with dynamic DeepEval descriptions from docstrings @mkoruszowic
• UI expandable long metric and checker reasons @mkoruszowic
• fix overwritten result files for concurrent scenario × persona runs @mkoruszowic
• UI/backend improve performance and fix/enable immediate status update after run completion
• UI pause/cancel run button
• UI remove Playground tab
• UI New run tab shouldn't remember last set configuration
• UI fix Rerun to reuse the scenario's configuration, not just the scenario itself

[mkoruszowic]

All changes are available on the mk/release-1.7.0 branch, alongside related improvements not covered