feat(deploy): move app URL to /human-machine-strata + 301 from the legacy path

Build default app-path → /human-machine-strata; deploy.sh APP_PATH default too.
_write_redirects now emits a permanent redirect /human-experience-simulator/* →
/human-machine-strata/:splat so old links still land. Media (R2 bucket) + Pages
project names are unchanged (not in the benstull.art URL). Updated the build
test (asserts the legacy redirect) + static-build e2e path + README paths.

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

tests/test_build_static.py

@@ -9,9 +9,9 @@ def test_build_emits_frontend_baked_json_and_only_referenced_media(tmp_path):
     result = build_static(
         out, media,
         media_base="https://static.benstull.art/",
-        app_path="/human-experience-simulator",
+        app_path="/human-machine-strata",
     )
-    app_dir = out / "human-experience-simulator"
+    app_dir = out / "human-machine-strata"
 
     # frontend present under the app path; dev/author surfaces excluded
     assert (app_dir / "index.html").exists()
@@ -25,10 +25,11 @@ def test_build_emits_frontend_baked_json_and_only_referenced_media(tmp_path):
     assert not (app_dir / "author.html").exists()
     assert not list(app_dir.glob("review*.html"))
 
-    # apex + no-slash redirect rules
+    # apex + no-slash redirect rules, plus the permanent legacy-path redirect
     redirects = (out / "_redirects").read_text()
-    assert "/  /human-experience-simulator/  308" in redirects
-    assert "/human-experience-simulator  /human-experience-simulator/  308" in redirects
+    assert "/  /human-machine-strata/  308" in redirects
+    assert "/human-machine-strata  /human-machine-strata/  308" in redirects
+    assert "/human-experience-simulator/*  /human-machine-strata/:splat  301" in redirects
 
     # baked JSON matches the API shape
     clips = json.loads((app_dir / "clips.json").read_text())