Implement reactive attributes for minimal DOM updates

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Features:
- Track attributes that depend on signals (ternary expressions)
- Store element references in globals for reactive attributes
- Re-evaluate and update only changed attributes when signals change
- Similar to reactive conditionals but for attributes

Performance:
- Minimal DOM updates - only changed attributes are updated
- No full re-renders, no virtual DOM diffing
- Direct attribute updates via js_set_attribute

Example:
  class_='tab active' if tab_index == 0 else 'tab'

When tab_index changes, only the class attribute updates.

Implementation:
- Collection phase: scan for attributes with signal dependencies
- Render phase: store element references to globals
- Signal update: re-evaluate expression and update attribute

All tests passing (55 passed, 2 skipped)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

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Aaron SinclairandClaude committed 2025-11-15 11:23:09 -08:00

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commit 1575571f3e

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