Complete Surface: plane surfaces, extrusions, isolines and moves

Adds SurfaceFromProfile and Extrude kernel operations (doc.solids.surface and
doc.solids.extrude), accepts surfaces in Transform, and maps Surface with
editable isolines. Fixes a real bug found by the test: the surface kind field
overwrote the entity-type kind key in Python dicts, so it is exposed as
surface_kind, with a catalog test guarding against name collisions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/plugin-host-model-completion-plan.md

@@ -7,13 +7,13 @@ Build a general Python document model over the OCS host API for all **43 canvas
 As of 20 September 2026, the working branch is `plugin/host-model-api` at
 `a8dd3640` plus the Leader increment, published as draft PR
 [#1391](https://github.com/HakanSeven12/OpenCADStudio/pull/1391). Host API is
-v7. The Python feature has explicit writes for **41 of 43** canvas kinds: 38
+v7. The Python feature has explicit writes for **42 of 43** canvas kinds: 39
 are creatable (the legacy `Polyline`, `Ole2Frame` and `Body` are update-only). This is **not** 41 completed
-kinds: Tolerance, Shape, AttributeEntity, Hatch, MLine, Dimension, MultiLeader, Table, PolygonMesh, PolyfaceMesh, Mesh, Wipeout, Point, Line, Circle, Arc, Ellipse, LwPolyline, Spline, Text, MText, Ray, XLine, Solid, Face3D, Solid3D and Region pass every completion gate; Insert now passes every gate too; the audited Polyline (update-only by decision), Polyline2D and Polyline3D pass every gate that their format allows.
+kinds: Tolerance, Shape, AttributeEntity, Hatch, MLine, Dimension, MultiLeader, Table, PolygonMesh, PolyfaceMesh, Mesh, Wipeout, Point, Line, Circle, Arc, Ellipse, LwPolyline, Spline, Text, MText, Ray, XLine, Solid, Face3D, Solid3D, Region and Surface pass every completion gate; Insert now passes every gate too; the audited Polyline (update-only by decision), Polyline2D and Polyline3D pass every gate that their format allows.
 AttributeDefinition passes its host and real IPC lifecycle but remains short of
 `Complete` because the previously pinned CAD codec dropped optional ATTDEF
 fields during DXF reads; revalidate that blocker against the current
-`acadrust` revision `7ea4247`. Leader is mapped and integration-tested but blocked at W by three acadrust persistence gaps (see the ledger). Leader, Helix, Underlay, ViewBorder and Light are mapped and integration-tested but blocked at W by acadrust persistence gaps, and RasterImage and Viewport are held short of `Complete` by unverifiable or missing oracles (see the ledger). RasterImage is mapped and integration-tested, held short of `Complete` by unverifiable image-dictionary linkage. The remaining two canvas kinds have only `layer`: SectionSymbol (blocked) and Surface (unblocked by design)
+`acadrust` revision `7ea4247`. Leader is mapped and integration-tested but blocked at W by three acadrust persistence gaps (see the ledger). Leader, Helix, Underlay, ViewBorder and Light are mapped and integration-tested but blocked at W by acadrust persistence gaps, and RasterImage and Viewport are held short of `Complete` by unverifiable or missing oracles (see the ledger). RasterImage is mapped and integration-tested, held short of `Complete` by unverifiable image-dictionary linkage. The remaining canvas kind, SectionSymbol, has only `layer` and is recorded as blocked
 writes through the document model. All 43 have raw typed snapshots. There are
 three internal records and two opaque fallbacks outside the 43 canvas kinds.
 
@@ -179,3 +179,4 @@ exact queue above and update statuses with evidence after each increment.
 - Investigated the cadkernel path for the ACIS kinds ([cadkernel-body-path.md](cadkernel-body-path.md)). The earlier "blocked" reasoning was overstated: OCS already builds primitives, transforms bodies and runs booleans through cadkernel, and `solid_to_sat` plus `kernel_acis_body` verify each result lifts back with no loss. Two `#[ignore]` spike tests measured exact volumes and DWG and DXF round trips for a box, moved, rotated and mirrored copies, three booleans, four other primitives and a `Body` entity. The real gap is an operation channel from a script to that pipeline; the note recommends an additive `solid_operation` host method and a phased plan (Solid3D create and transform, then booleans and Body, then Region, then Surface). Booleans took about 23 s each in a debug build and need release timing first. Region, Body, Solid3D and Surface move from blocked to unblocked-by-design; SectionSymbol stays blocked.
 - Built the cadkernel operation channel and completed `Solid3D` (create and rigid move). `HostApi::solid_operation` is additive (default "unsupported"), so older hosts and plugins are unaffected; it travels as `PluginRequest::SolidOperation` and `PluginResponse::SolidResult`, and the host records its own undo step only after validation so a refused operation leaves nothing behind. The Python surface is `doc.solids.*`. Every result is verified lossless by the kernel path before it is accepted and a payload that will not lift is refused untouched. `Body` moves through the same channel and `Region` is accepted but untested. Booleans, Region creation from curves and Surface remain, in that order; booleans wait on release-build timing. Solid3D, Body and Region are now mapped read-only with the opaque payload excluded and preserved.
 - Completed `Region`. `SolidOperation::RegionFromProfile` reuses the REGION command's kernel calls and `doc.solids.region` exposes it; the lifecycle test creates regions from real circle and polyline entities and covers deletion of the source, refusals, a move, both formats and undo. Along the way `create_entity` now accepts `(x, y, z)` tuples for point properties (decided from the schema's property types) and every generated float setter accepts Python ints, so `create_entity('Circle', center=(0, 0, 0), radius=5)` works. Left: booleans (release timing first), holes and open-curve merging for regions, and `Surface`.
+- Completed `Surface` for planes, extruded open profiles, isolines and rigid moves. `SurfaceFromProfile` and `Extrude` join the kernel operations (`doc.solids.surface` and `doc.solids.extrude`); `Extrude` also gives Solid3D extrusions from closed profiles, checked against analytic volumes. The test found and fixed a real bug: Surface's `kind` field silently overwrote the entity-type `kind` key in Python dicts, so it is exposed as `surface_kind`, and a new uniqueness test guards the whole catalog. Transform now accepts surfaces (a plane stays a plane; other kinds turn generic). Left: booleans (release timing first), regions with holes, and lofted, revolved, swept and NURBS surfaces. SectionSymbol is the only unmapped kind.