feat(auth): replace cookie/api-key auth with JWT Bearer tokens, separate UI from API

- Add JWT Bearer token validation to Rust API via OIDC provider JWKS
  with automatic key rotation and 1-hour cache
- Remove x-api-key auth support and built-in web UI from furumi-web-player,
  leaving it as a pure API server
- Add /auth/token endpoint to Node player server to expose OIDC access
  tokens to the frontend
- Move Node player auth endpoints from /api/* to /auth/* to avoid
  path conflicts with Rust API
- Add static file serving to Node Express server for production
  single-container deployment
- Fix SameSite=Strict cookie issue breaking OIDC redirect flow (use Lax)
- Add Dockerfile.node-player with multi-stage Node.js build
- Add CI workflows for node-player Docker image (dev + release)
- Optimize Rust Dockerfiles with dependency caching layer
- Update docker-compose with OIDC env vars and OLLAMA_MODEL support
- Cherry-pick agent LLM client fixes from DEV branch

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

furumi-web-player/src/web/auth.rs

@@ -3,10 +3,9 @@ use axum::{
     extract::{Request, State},
     http::{header, HeaderMap, StatusCode},
     middleware::Next,
-    response::{Html, IntoResponse, Redirect, Response},
+    response::{IntoResponse, Redirect, Response},
 };
 
-const X_API_KEY: &str = "x-api-key";
 use openidconnect::{
     core::{CoreClient, CoreProviderMetadata, CoreResponseType},
     reqwest::async_http_client,
@@ -18,17 +17,26 @@ use serde::Deserialize;
 
 use base64::Engine;
 use hmac::{Hmac, Mac};
+use jsonwebtoken::{decode, decode_header, DecodingKey, Validation as JwtValidation};
+use jsonwebtoken::jwk::JwkSet;
+use std::time::{Duration, Instant};
+use tokio::sync::RwLock;
 
 use super::AppState;
 use std::sync::Arc;
 
 const SESSION_COOKIE: &str = "furumi_session";
+const JWKS_CACHE_TTL: Duration = Duration::from_secs(3600);
 
 type HmacSha256 = Hmac<sha2::Sha256>;
 
 pub struct OidcState {
     pub client: CoreClient,
     pub session_secret: Vec<u8>,
+    jwks_uri: String,
+    issuer_url: String,
+    jwks_cache: RwLock<Option<(JwkSet, Instant)>>,
+    http_client: reqwest::Client,
 }
 
 pub async fn oidc_init(
@@ -44,6 +52,9 @@ pub async fn oidc_init(
     )
     .await?;
 
+    let jwks_uri = provider_metadata.jwks_uri().to_string();
+    let issuer_url = provider_metadata.issuer().to_string();
+
     let client = CoreClient::from_provider_metadata(
         provider_metadata,
         ClientId::new(client_id),
@@ -62,12 +73,70 @@ pub async fn oidc_init(
         b
     };
 
+    let http_client = reqwest::Client::new();
+
+    tracing::info!("JWKS URI: {}", jwks_uri);
+
     Ok(OidcState {
         client,
         session_secret,
+        jwks_uri,
+        issuer_url,
+        jwks_cache: RwLock::new(None),
+        http_client,
     })
 }
 
+impl OidcState {
+    async fn get_jwks(&self) -> anyhow::Result<JwkSet> {
+        {
+            let cache = self.jwks_cache.read().await;
+            if let Some((ref jwks, fetched_at)) = *cache {
+                if fetched_at.elapsed() < JWKS_CACHE_TTL {
+                    return Ok(jwks.clone());
+                }
+            }
+        }
+        self.refresh_jwks().await
+    }
+
+    async fn refresh_jwks(&self) -> anyhow::Result<JwkSet> {
+        tracing::debug!("Fetching JWKS from {}", self.jwks_uri);
+        let jwks: JwkSet = self.http_client.get(&self.jwks_uri).send().await?.json().await?;
+        let mut cache = self.jwks_cache.write().await;
+        *cache = Some((jwks.clone(), Instant::now()));
+        Ok(jwks)
+    }
+}
+
+#[derive(Debug, serde::Deserialize)]
+struct BearerClaims {
+    sub: String,
+}
+
+async fn validate_bearer_token(oidc: &OidcState, token: &str) -> Option<String> {
+    let header = decode_header(token).ok()?;
+    let kid = header.kid.as_ref()?;
+
+    let mut jwks = oidc.get_jwks().await.ok()?;
+    let mut jwk = jwks.find(kid);
+
+    // Handle key rotation: refresh JWKS if kid not found
+    if jwk.is_none() {
+        jwks = oidc.refresh_jwks().await.ok()?;
+        jwk = jwks.find(kid);
+    }
+
+    let key = DecodingKey::from_jwk(jwk?).ok()?;
+
+    let mut validation = JwtValidation::new(header.alg);
+    validation.set_issuer(&[&oidc.issuer_url]);
+    validation.validate_aud = false;
+
+    let data = decode::<BearerClaims>(token, &key, &validation).ok()?;
+    Some(data.claims.sub)
+}
+
 fn generate_sso_cookie(secret: &[u8], user_id: &str) -> String {
     let mut mac = HmacSha256::new_from_slice(secret).unwrap();
     mac.update(user_id.as_bytes());
@@ -94,20 +163,22 @@ fn verify_sso_cookie(secret: &[u8], cookie_val: &str) -> Option<String> {
     }
 }
 
-/// Auth middleware: requires valid SSO session cookie or x-api-key header.
+/// Auth middleware: requires valid Bearer JWT or SSO session cookie.
 pub async fn require_auth(
     State(state): State<Arc<AppState>>,
     req: Request,
     next: Next,
 ) -> Response {
-    // 1. Check x-api-key header (if configured)
-    if let Some(ref expected) = state.api_key {
-        if let Some(val) = req
+    // 1. Check Bearer token — JWT from OIDC provider
+    if let Some(ref oidc) = state.oidc {
+        if let Some(token) = req
             .headers()
-            .get(X_API_KEY)
+            .get(header::AUTHORIZATION)
             .and_then(|v| v.to_str().ok())
+            .and_then(|v| v.strip_prefix("Bearer "))
         {
-            if val == expected {
+            if let Some(user_id) = validate_bearer_token(oidc, token).await {
+                tracing::debug!("Bearer auth OK for user: {}", user_id);
                 return next.run(req).await;
             }
         }
@@ -131,36 +202,7 @@ pub async fn require_auth(
         }
     }
 
-    let uri = req.uri().to_string();
-    if uri.starts_with("/api/") {
-        (StatusCode::UNAUTHORIZED, "Unauthorized").into_response()
-    } else if state.oidc.is_some() {
-        Redirect::to("/login").into_response()
-    } else {
-        // Only API key configured — no web login available
-        (StatusCode::UNAUTHORIZED, "Unauthorized").into_response()
-    }
-}
-
-/// GET /login — show SSO login page.
-pub async fn login_page(State(state): State<Arc<AppState>>) -> impl IntoResponse {
-    if state.oidc.is_none() {
-        return Redirect::to("/").into_response();
-    }
-
-    Html(LOGIN_HTML).into_response()
-}
-
-/// GET /logout — clear session cookie.
-pub async fn logout() -> impl IntoResponse {
-    let cookie = format!(
-        "{}=; HttpOnly; SameSite=Strict; Path=/; Expires=Thu, 01 Jan 1970 00:00:00 GMT",
-        SESSION_COOKIE
-    );
-    let mut headers = HeaderMap::new();
-    headers.insert(header::SET_COOKIE, cookie.parse().unwrap());
-    headers.insert(header::LOCATION, "/login".parse().unwrap());
-    (StatusCode::FOUND, headers, Body::empty()).into_response()
+    (StatusCode::UNAUTHORIZED, "Unauthorized").into_response()
 }
 
 #[derive(Deserialize)]
@@ -335,9 +377,9 @@ pub async fn oidc_callback(
         .unwrap_or(false);
 
     let session_attrs = if is_https {
-        "SameSite=Strict; Secure"
+        "SameSite=Lax; Secure"
     } else {
-        "SameSite=Strict"
+        "SameSite=Lax"
     };
 
     let session_cookie = format!(
@@ -354,47 +396,3 @@ pub async fn oidc_callback(
 
     (StatusCode::FOUND, headers, Body::empty()).into_response()
 }
-
-const LOGIN_HTML: &str = r#"<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="UTF-8">
-<meta name="viewport" content="width=device-width, initial-scale=1.0">
-<title>Furumi Player — Login</title>
-<style>
-  * { box-sizing: border-box; margin: 0; padding: 0; }
-  body {
-    min-height: 100vh;
-    display: flex; align-items: center; justify-content: center;
-    background: #0d0f14;
-    font-family: 'Inter', system-ui, sans-serif;
-    color: #e2e8f0;
-  }
-  .card {
-    background: #161b27;
-    border: 1px solid #2a3347;
-    border-radius: 16px;
-    padding: 2.5rem 3rem;
-    width: 360px;
-    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
-    text-align: center;
-  }
-  .logo { font-size: 1.8rem; font-weight: 700; color: #7c6af7; margin-bottom: 0.25rem; }
-  .subtitle { font-size: 0.85rem; color: #64748b; margin-bottom: 2rem; }
-  .btn-sso {
-    display: block; width: 100%; padding: 0.75rem; text-align: center;
-    background: #7c6af7; border: none; border-radius: 8px;
-    color: #fff; font-size: 0.95rem; font-weight: 600; text-decoration: none;
-    cursor: pointer; transition: background 0.2s;
-  }
-  .btn-sso:hover { background: #6b58e8; }
-</style>
-</head>
-<body>
-<div class="card">
-  <div class="logo">Furumi</div>
-  <div class="subtitle">Sign in to continue</div>
-  <a href="/auth/login" class="btn-sso">SSO Login</a>
-</div>
-</body>
-</html>"#;