Removed width attribute from the logo image.

DrawSession:
- Add DrawSolid() — renders Solid faces as PositionNormal triangles with
  ambient/diffuse lighting, tessellates edges as lines. Supports transparency
  (0.0–1.0) with correct opaque/transparent pass handling.
- Add DrawMesh() — renders Mesh as flat-shaded triangles with per-triangle
  normals computed from cross product.
- Split GPU buffers into _lineBuffers (Position+LineList) and _triBuffers
  (PositionNormal+TriangleList) for independent pipeline paths.
- UseInTransparentPass() returns true when any solid has transparency > 0.
- RenderScene() handles both passes: opaque (lines + solid faces) and
  transparent (transparent faces only).
- CanExecute() and ComputeOutline() account for all three primitive lists.
- Clear() clears lines, solids and meshes.
- Fix: Remove auto-registration from constructor — registration is now
  explicit via RegisterDrawSession() or Register().
- Fix: VertexBuffer/IndexBuffer.Map(0) → Map(actualSize) — Map() takes
  buffer size in floats/shorts, not an offset. Passing 0 wrote no data.

UIControlledApplicationExtensions:
- Add RegisterDrawSession() extension on UIControlledApplication.
  Encapsulates correct DirectContext3D registration order per Revit API docs:
  AddServer → GetActiveServerIds → Contains check → SetActiveServers.
  Replaces ~10 lines of boilerplate with a single call in OnStartup.

Docs:
- README: Add DrawSession and DrawExtensions usage sections with full examples.
- CLAUDE.md: Add DrawSession section covering registration pattern,
  UIApplication lifecycle, fixed bugs, CanExecute conditions, threading model.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- Fix black faces: pre-compute all triangle data (Triangulate, ComputeNormal)
  in DrawSolid/DrawMesh on the main thread instead of calling Revit geometry
  API from the render thread (where it silently fails, producing zero normals)
- Replace _solids/_meshes raw storage with _triData (pre-computed tuples)
- Add DrawBox(XYZ min, XYZ max), DrawBox(BoundingBoxXYZ), DrawBox(Outline):
  filled axis-aligned box with 12 wireframe edges, pure math triangulation
- Add DrawSphere(XYZ center, double radius): UV sphere (16x32 rings) with
  3 great-circle wireframe edges, pure math triangulation
- Rename private DrawBox helper to DrawWireBox to avoid name conflict

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

…DotNet

- Replace stroke-font approach with GraphicsPath.AddString() → Flatten() → LibTessDotNet
  tessellation so any system font renders as filled triangles (handles holes in O, A, B, D, etc.)
- Add _textCache static dict: normalised (height=1.0, Y-up) triangles cached per (text, fontFamily)
- Add BuildTextTriangles / ExtractContours / GetFontFamily private helpers
- Remove AppendThickSegment and _strokeFont dictionary (old stroke-font code)
- Add DrawPoint(XYZ, string label, ...) overload: cross + DrawText label
- Add DrawBox(min,max) / DrawBox(BoundingBoxXYZ) / DrawBox(Outline) — pure-math box triangulation
- Add DrawSphere(center, radius) — UV-sphere 16×32 tessellation, no Revit geometry API calls
- Add DrawSolid / DrawMesh with main-thread pre-computed triangles (fixes black faces on render thread)
- Add LibTessDotNet v1.1.0 + System.Drawing.Common v8.0.0 (net8) / System.Drawing ref (net4x)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>