feat(pipeline): add runnable artifact pipeline increment

[Change Nature]
- This commit adds the first runnable increment of the F# artifact
  pipeline: CLI, server, frontend bundle, stage fixture, and tests.
  It is feature work, not a bug fix.

[New Capability]
- CLI `run` executes the three-step Blender fixture through the process
  bridge and writes GLBs, step logs, events, and a manifest; `verify`
  validates a manifest without Blender.
- Server exposes run start, run-scoped SSE, artifact manifest/file
  routes, and serves the Fable frontend from its build output.
- Frontend starts runs, follows run-scoped SSE progress, and links the
  artifact manifest on completion.

[Implementation]
- Shared layer holds domain, run state, replay, and artifact contracts;
  Modeling holds the pipeline, 120s bridge timeout, and result-file
  protocol; stage/blender/fixture.py owns geometry in Python (bpy owns
  geometry, F# owns orchestration).
- Fable bundle is regenerated into public/ and copied by the server
  project; solution includes all projects with warnings-as-errors.
- README documents build, Fable, server, interpreter/env, fixture
  limitations, and current verification status.

[Impact]
- Verified: 40/40 solution tests pass; Release build 0 warnings/errors;
  real CLI run with bpy 5.0.1 produced 3 GLBs, 3 logs, and a
  verify-clean manifest; isolated-port server smoke flow succeeded.
- Not yet verified: browser end-to-end behavior and production
  fidelity. Artifacts and caches are gitignored.

1 files changed, 107 insertions, 0 deletions

diff --git a/src/SomhairlesDream.Shared/Replay.fs b/src/SomhairlesDream.Shared/Replay.fs
new file mode 100644
index 0000000..782e632
--- /dev/null
+++ b/src/SomhairlesDream.Shared/Replay.fs
@@ -0,0 +1,107 @@
+namespace SomhairlesDream.Shared
+
+type ReplayFrame =
+    { Version: int
+      Label: string
+      Mesh: MeshSnapshot }
+
+module Replay =
+    let private vertex x y z =
+        { X = x
+          Y = y
+          Z = z }
+
+    let private frame version label vertices faces =
+        { Version = version
+          Label = label
+          Mesh =
+            { Version = version
+              Label = label
+              Vertices = vertices
+              Faces = faces } }
+
+    let frames () =
+        [| frame
+               1
+               "重建起点"
+               [| vertex -2.0 0.0 -1.0
+                  vertex 2.0 0.0 -1.0
+                  vertex 2.0 0.0 1.0
+                  vertex -2.0 0.0 1.0
+                  vertex -1.0 2.0 -0.5
+                  vertex 1.0 2.0 -0.5
+                  vertex 1.0 2.0 0.5
+                  vertex -1.0 2.0 0.5 |]
+               [| [| 0; 1; 2 |]
+                  [| 0; 2; 3 |]
+                  [| 4; 6; 5 |]
+                  [| 4; 7; 6 |]
+                  [| 0; 4; 5 |]
+                  [| 0; 5; 1 |]
+                  [| 1; 5; 6 |]
+                  [| 1; 6; 2 |]
+                  [| 2; 6; 7 |]
+                  [| 2; 7; 3 |]
+                  [| 3; 7; 4 |]
+                  [| 3; 4; 0 |] |]
+           frame
+               2
+               "主承力骨架"
+               [| vertex -2.5 0.0 -1.0
+                  vertex 2.5 0.0 -1.0
+                  vertex 2.5 0.0 1.0
+                  vertex -2.5 0.0 1.0
+                  vertex -1.5 2.2 -0.7
+                  vertex 1.5 2.2 -0.7
+                  vertex 1.5 2.2 0.7
+                  vertex -1.5 2.2 0.7
+                  vertex -0.45 0.0 -0.45
+                  vertex 0.45 0.0 -0.45
+                  vertex 0.45 3.0 0.45
+                  vertex -0.45 3.0 0.45 |]
+               [| [| 0; 1; 2 |]
+                  [| 0; 2; 3 |]
+                  [| 4; 6; 5 |]
+                  [| 4; 7; 6 |]
+                  [| 8; 9; 10 |]
+                  [| 8; 10; 11 |]
+                  [| 0; 4; 8 |]
+                  [| 4; 11; 8 |]
+                  [| 1; 9; 5 |]
+                  [| 1; 5; 2 |]
+                  [| 2; 5; 10 |]
+                  [| 2; 10; 3 |]
+                  [| 3; 10; 7 |]
+                  [| 3; 7; 0 |] |]
+           frame
+               3
+               "舱段重构"
+               [| vertex -3.0 0.0 -1.3
+                  vertex 3.0 0.0 -1.3
+                  vertex 3.0 0.0 1.3
+                  vertex -3.0 0.0 1.3
+                  vertex -2.0 2.0 -1.0
+                  vertex 2.0 2.0 -1.0
+                  vertex 2.0 2.0 1.0
+                  vertex -2.0 2.0 1.0
+                  vertex -1.0 3.4 -0.65
+                  vertex 1.0 3.4 -0.65
+                  vertex 1.0 3.4 0.65
+                  vertex -1.0 3.4 0.65
+                  vertex -3.8 0.6 0.0
+                  vertex 3.8 0.6 0.0 |]
+               [| [| 0; 1; 2 |]
+                  [| 0; 2; 3 |]
+                  [| 4; 6; 5 |]
+                  [| 4; 7; 6 |]
+                  [| 8; 9; 10 |]
+                  [| 8; 10; 11 |]
+                  [| 0; 4; 8 |]
+                  [| 0; 8; 12 |]
+                  [| 1; 13; 5 |]
+                  [| 1; 2; 13 |]
+                  [| 2; 6; 10 |]
+                  [| 2; 10; 13 |]
+                  [| 3; 11; 7 |]
+                  [| 3; 12; 11 |]
+                  [| 3; 0; 12 |] |] |]