fix(ios): P3 HIG polish — final batch

[datlechin]

Summary

Final batch of nice-to-have polish from the iOS UI/UX audit (P3 priority). 8 files changed.

Tiny Fixes

• RowCard font bump: Column labels from .caption2 to .caption for better readability
• Safe Mode picker: Changed to .menu style (dropdown instead of nav push for 3 options)
• SSH Auth picker: Changed to .segmented style (ideal for 2-option binary choice)
• Clear confirmation: "Clear" in query editor overflow menu now shows confirmation dialog
• Lock icon size: Bumped from .caption2 to .caption in Tags list
• FK button size: Bumped from .caption2 to .footnote in Row Detail

Small Features

• Leading swipe on connections: Swipe right → blue "Edit" action (uses existing edit sheet)
• Live elapsed timer: Shows running time during query execution via TimelineView, static time after completion
• Reconnect indicator: Subtle "Reconnecting..." capsule with spinner appears during reconnection

Test plan

• RowCard column labels slightly larger
• Safe Mode picker shows as dropdown menu
• SSH Auth picker shows as segmented control
• Clear button → confirmation dialog before clearing
• Lock icon slightly larger in Tags
• FK button slightly larger in Row Detail
• Swipe right on connection → "Edit" action
• Run a query → live timer counts up during execution
• Kill network → app foregrounds → "Reconnecting..." pill appears