Extends the cross-tab layout projection system to support WMMA and MFMA tabs, with shared infrastructure to eliminate code duplication and comprehensive bug fixes.

Key additions:
- Shared projection helpers in CanvasTab base class (setupLinearLayoutProjection, prepareLinearLayoutSnapshot, normalizeLaneDimensionNames)
- WMMA tab projection with dimension reordering (dimM/dimK/dimN) per operand type
- MFMA tab projection with tensor shape clamping for small layouts (fixes 4×16 bug)
- "Show in Linear Layout" buttons added to WMMA and MFMA tab UIs

Bug fixes:
- Fixed WMMA dimension ordering bug (dimensions now reordered to match tensor axes)
- Fixed MFMA 4×16 conversion bug (layouts clamped to actual tensor size)
- Fixed test organization (moved stray tests inside describe blocks)
- Eliminated code duplication between Block/WMMA/MFMA tabs

Test coverage:
- Added CanvasTab.test.ts for shared projection helper testing
- Added WMMALayoutTab.test.ts (4 tests) with dimension ordering and alert coverage
- Added MFMALayoutTab.test.ts (5 tests) with 4×16 regression test
- Added LinearLayoutProjection.integration.test.ts for end-to-end validation
- Enhanced BlockLayoutTab.test.ts with missing edge case coverage
- Total: 166 tests passing (up from 154)

All three layout tabs now provide consistent projection UX with automatic dimension filtering, name normalization, and helpful error messages.

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

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