Add "Show in Linear Layout" projection for WMMA and MFMA tabs

[leeliu103]

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.

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