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>

internal/web/handler.go

@@ -2,13 +2,28 @@ package web
 
 import (
 	"context"
+	_ "embed"
 	"net/http"
 )
 
+// atlasHTML is the Phase-A static hero visualization. Phase C replaces this
+// self-contained file with a Templ view hydrated from live CAD trace data
+// (assessor-loop ledger, session_log, Gitea run API, Flux events).
+//
+//go:embed static/cad-atlas.html
+var atlasHTML []byte
+
+// NewHandler serves the CAD Atlas. Root ("/") returns the static atlas;
+// /api/hello is a leftover template probe kept until Phase C wires real endpoints.
 func NewHandler() http.Handler {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
-		_ = Index().Render(context.Background(), w)
+		if r.URL.Path != "/" {
+			http.NotFound(w, r)
+			return
+		}
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		_, _ = w.Write(atlasHTML)
 	})
 	mux.HandleFunc("/api/hello", func(w http.ResponseWriter, r *http.Request) {
 		_ = Hello("world").Render(context.Background(), w)