refactor: rename API and frontend projects to Vocero

Rename the project directories, Python distribution and import package, and npm package. Update launcher, Docker, tooling, tests, lockfiles, and documentation while preserving existing API contracts.

Make AGENTS.md self-contained and remove external skill and workflow references.

vocero-api/vocero_api/core/urls.py

@@ -0,0 +1,53 @@
+from __future__ import annotations
+
+from urllib.parse import parse_qsl, urlencode, urlsplit, urlunsplit
+
+from fastapi import Request, WebSocket
+
+from vocero_api.core import config as settings
+
+
+def _url_with_query(url: str, **params: str) -> str:
+    target = urlsplit(url)
+    merged_query = dict(parse_qsl(target.query, keep_blank_values=True))
+    for key, value in params.items():
+        if value:
+            merged_query[key] = value
+    return urlunsplit(
+        (
+            target.scheme,
+            target.netloc,
+            target.path,
+            urlencode(merged_query, doseq=True),
+            target.fragment,
+        )
+    )
+
+
+def _proxy_public_url(request: Request) -> str:
+    if not settings.S2S_PROXY_TARGET:
+        return ""
+    forwarded_proto = (request.headers.get("x-forwarded-proto") or request.url.scheme).split(",")[0].strip()
+    forwarded_host = (
+        (request.headers.get("x-forwarded-host") or request.headers.get("host") or request.url.netloc)
+        .split(",")[0]
+        .strip()
+    )
+    ws_scheme = "wss" if forwarded_proto in {"https", "wss"} else "ws"
+    root_path = (request.scope.get("root_path") or "").rstrip("/")
+    return f"{ws_scheme}://{forwarded_host}{root_path}/v1/realtime"
+
+
+def _proxy_upstream_url(ws: WebSocket) -> str:
+    target = urlsplit(settings.S2S_PROXY_TARGET)
+    merged_query = dict(parse_qsl(target.query, keep_blank_values=True))
+    merged_query.update(parse_qsl(ws.url.query, keep_blank_values=True))
+    return urlunsplit(
+        (
+            target.scheme,
+            target.netloc,
+            target.path or "/v1/realtime",
+            urlencode(merged_query, doseq=True),
+            target.fragment,
+        )
+    )