[P1] Overlays: Apply Dialog fixes to Drawer, Dropdown, Tooltip

[sujaypawar]

Summary

Apply Dialog accessibility fixes to Drawer, Dropdown Menu, and Tooltip components.

Severity: P1 (High)
WCAG: Multiple (2.1.2, 2.4.3, 4.1.2)
Components: Drawer, Dropdown Menu, Tooltip

Issue

These overlay components likely have same accessibility issues as Dialog:

• No focus trap
• No initial focus management
• No focus return
• Missing ARIA attributes
• No prefers-reduced-motion

Affected Components

Drawer - src/components/drawer/

• Add focus trap
• Manage initial focus
• Return focus on close
• Add aria-modal, aria-labelledby
• Respect motion preferences

Dropdown Menu - src/components/dropdown-menu/

• Trap focus in menu
• Arrow key navigation
• Return focus to trigger
• Add proper ARIA menu roles

Tooltip - src/components/tooltip/

• Keyboard accessible (focus trigger)
• ESC key dismisses
• Proper ARIA attributes
• Respect motion preferences

Fix Pattern

Apply solutions from:

• [P0] Dialog: Missing aria-modal attribute #370: aria-modal
• [P0] Dialog: No focus trap - keyboard users can escape modal #371: Focus trap
• [P0] Dialog: Missing aria-labelledby connection to title #374: aria-labelledby
• [P0] Dialog: No initial focus management when opened #375: Initial focus
• [P1] Dialog: No focus return to trigger on close #384: Focus return
• [P1] Global: No prefers-reduced-motion support (30+ components) #378: Motion preferences

Effort: 4-6 hours (1-2 hours per component)

Testing

• Each component: Focus trap works
• Each component: Focus managed
• Each component: Keyboard accessible
• Each component: Screen reader tested
• No regressions

Related: #369, #370-#385
Priority: P1 - 3 critical components