feat: Phase A — serve static CAD Atlas viz + self-contained context

Wire the reel-style CAD workflow atlas (signal→pod) as the served page via
go:embed. Fill PROJECT.md/README with the 9-stage workflow, three governance
gates (Ed25519 admission / dispatch-allow / var-go Oath), phase map A→C,
dogfooding model, brain deep-links and external references.

Fixes two template-go-web latent bugs surfaced by dogfooding:
- templ version skew: go.mod pinned v0.2.778 vs templ@latest generator
- .gitignore pattern *.templ.go did not match generated *_templ.go

Verified: go build · vet · golangci-lint (0 issues) · go test green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.context/mcp.json

@@ -3,6 +3,24 @@
     "knowledge": {
       "url": "http://localhost:3100/mcp",
       "description": "Project knowledge base — vector + graph retrieval"
+    },
+    "brain": {
+      "type": "http",
+      "url": "https://brain-mcp.d-ma.be/mcp",
+      "headers": {
+        "Authorization": "Bearer ${BRAIN_MCP_TOKEN}"
+      }
+    },
+    "gitea": {
+      "type": "http",
+      "url": "https://git-mcp.d-ma.be/mcp",
+      "headers": {
+        "Authorization": "Bearer ${GITEA_MCP_TOKEN}"
+      }
+    },
+    "infra": {
+      "type": "http",
+      "url": "https://infra-mcp.d-ma.be/mcp"
     }
   }
 }