v0.6.0: bootable-ISO polish + close the 0.5.x chapter

Builds on v0.5.9's El Torito detection to make the boot menu honest and
clean, and confirms generic El Torito ISOs (ESXi/VMvisor installers, BSDs,
firmware tools) boot via iPXE sanboot with no special-casing:

- generate_boot_entries: an Unknown-family ISO now produces a sanboot entry
  only when it's actually bootable — it carries an El Torito catalog, OR it's
  a remote-share ISO we couldn't introspect (rev 0, assumed bootable). A
  locally-introspected ISO with no boot catalog (a data/appliance image like
  a VMware vCenter Server Appliance bundle) yields NO entry, so it stays out
  of the iPXE menu instead of offering a pick that always fails. ESXi
  installers (Unknown family + El Torito) surface under the installer menu
  and sanboot the raw ISO — backed by HTTP range reads, so size is moot.
- Dropped the stale "(SAN boot — may fail for >1GiB ISOs)" disclaimer and
  refreshed the SanBootIso doc: sanboot is the primary path for Windows and
  any El Torito image, and HTTP range reads remove the size limit.
- WebUI: renamed the dashboard panel "Images that won't boot with current
  settings" -> "Non-bootable images" (there's no setting that would make a
  data/appliance ISO boot).
- Tests: el_torito catalog detection + boot-entry generation across the
  ESXi / VCSA / remote-share cases.

Full v0.5.0->v0.5.9 compatibility sweep: clippy clean; entire workspace test
suite green (core 96, http-api 31+68, iso-store 61, dhcp 1, tftp 6, bin 2);
app.js syntax-checked.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

.gitignore

@@ -11,3 +11,6 @@ data/work/
 .claude/settings.local.json
 .claude/worktrees/
 .claude/scheduled_tasks.lock
+
+# local editor / agent settings (not part of the project)
+.claude/

Cargo.lock

@@ -2669,7 +2669,7 @@ checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
 [[package]]
 name = "openpxe"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "axum",
@@ -2691,7 +2691,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-core"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "base64",
@@ -2718,7 +2718,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-dhcp-proxy"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "bytes",
@@ -2732,7 +2732,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-http-api"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "axum",
@@ -2768,7 +2768,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-ipxe-assets"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "openpxe-core",
  "rust-embed",
@@ -2778,7 +2778,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-iso-store"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "bcrypt",
@@ -2807,7 +2807,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-tftp"
-version = "0.5.6"
+version = "0.6.0"
 dependencies = [
  "anyhow",
  "bytes",
@@ -2821,7 +2821,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-webui"
-version = "0.5.6"
+version = "0.6.0"
 
 [[package]]
 name = "p256"

Cargo.toml

@@ -12,7 +12,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.5.6"
+version = "0.6.0"
 edition = "2021"
 rust-version = "1.95"
 license = "MIT OR Apache-2.0"

README.md

@@ -14,7 +14,7 @@
 </p>
 
 <p align="center">
-  <img alt="release"   src="https://img.shields.io/badge/release-v0.5.5-2874d7" />
+  <img alt="release"   src="https://img.shields.io/badge/release-v0.5.8-2874d7" />
   <img alt="license"   src="https://img.shields.io/badge/license-MIT%20%7C%20Apache--2.0-59824f" />
   <img alt="rust"      src="https://img.shields.io/badge/built%20with-Rust-fb8841?logo=rust&logoColor=white" />
   <img alt="container" src="https://img.shields.io/badge/container--native-OCI%20%C2%B7%20OpenShift-2496ED?logo=docker&logoColor=white" />

crates/core/src/lib.rs

@@ -36,4 +36,4 @@ pub use profile::DeployProfile;
 pub use queue::{DeploymentQueue, QueueEntry};
 pub use saml::{IdpMetadata, SamlError, SpParams, VerifiedPrincipal, VerifiedResponse};
 pub use settings::{Settings, SettingsStore, TimeoutAction};
-pub use sso::{SsoConfig, SsoStore};
+pub use sso::{SsoConfig, SsoLoginInfo, SsoStore};

crates/core/src/sso.rs

@@ -73,6 +73,23 @@ impl SsoConfig {
     }
 }
 
+/// The minimal, non-sensitive slice of the SSO config that the **pre-auth**
+/// login screen needs to render the "Sign in with …" button. Carries only
+/// the display affordances — never the metadata XML/URL or entity ID, which
+/// stay behind the auth-gated `/api/sso`. Served as part of the public
+/// `/api/me` so the button renders reliably whether or not anyone is signed
+/// in (v0.5.9: fixes the button vanishing because `/api/sso` 401s pre-auth).
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct SsoLoginInfo {
+    /// True only when SSO is *usable* (enabled AND a metadata source is
+    /// present) — i.e. clicking the button will actually reach an IdP.
+    pub enabled: bool,
+    /// Button label, e.g. "STC AD". Empty falls back to "SSO" in the UI.
+    pub idp_name: String,
+    /// Optional IdP logo rendered on the button. Empty = no image.
+    pub idp_logo_url: String,
+}
+
 /// In-memory + on-disk SSO settings registry.
 #[derive(Debug, Clone)]
 pub struct SsoStore {
@@ -111,6 +128,19 @@ impl SsoStore {
         self.inner.read().clone()
     }
 
+    /// Public, non-sensitive descriptor for the login screen. Safe to
+    /// expose pre-auth — it's exactly what the "Sign in with …" button
+    /// keys off, with no metadata/entity-ID leakage. v0.5.9.
+    #[must_use]
+    pub fn login_info(&self) -> SsoLoginInfo {
+        let cfg = self.inner.read();
+        SsoLoginInfo {
+            enabled: cfg.is_usable(),
+            idp_name: cfg.idp_name.clone(),
+            idp_logo_url: cfg.idp_logo_url.clone(),
+        }
+    }
+
     /// Replace the whole config in one shot. Light validation: metadata
     /// XML and URL are length-capped so an operator can't OOM us by
     /// pasting a 10 GiB blob; the IdP UI tab clamps the input visually,

crates/http-api/src/auth.rs

@@ -319,6 +319,12 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
     // and the logo asset is public, so this leaks nothing sensitive.
     let has_custom_logo = state.branding.has_any_web_logo();
     let logo_rev = state.branding.logo_rev();
+    // v0.5.9: ship the non-sensitive SSO descriptor with every /api/me so
+    // the pre-auth login screen can render the "Sign in with …" button
+    // reliably. Previously the button keyed off the auth-gated /api/sso,
+    // which 401s when logged out — the button only survived on a stale
+    // in-memory config and vanished on any fresh login-page load.
+    let sso = state.sso.login_info();
     if !state.admin.is_configured() {
         return (
             StatusCode::OK,
@@ -327,6 +333,7 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
                 "authenticated": false,
                 "has_custom_logo": has_custom_logo,
                 "logo_rev": logo_rev,
+                "sso": sso,
             })),
         )
             .into_response();
@@ -343,6 +350,7 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
                 "session_user": u,
                 "has_custom_logo": has_custom_logo,
                 "logo_rev": logo_rev,
+                "sso": sso,
             })),
         )
             .into_response(),
@@ -353,6 +361,7 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
                 "authenticated": false,
                 "has_custom_logo": has_custom_logo,
                 "logo_rev": logo_rev,
+                "sso": sso,
             })),
         )
             .into_response(),

crates/http-api/src/ipxe_script.rs

@@ -61,16 +61,24 @@ pub fn render_menu(isos: &[IsoMeta], settings: &Settings, base_url: &str) -> Str
     // returns a full-screen 1024×768 PNG now — the operator's logo on a
     // dark field, or a default OpenPXE mark when none is uploaded. The
     // `--top 290` reserves the top band (where the logo paints) so the
-    // menu text lands below it. On an iPXE build *with* `IMAGE_PNG` +
-    // `CONSOLE_FRAMEBUFFER` (our x86_64 UEFI binaries, built from source
-    // — see deploy/docker/Dockerfile) this paints the background and
-    // overlays the menu. On a build *without* PNG support (the fetched
-    // BIOS/i386/arm64 binaries) the whole `console --picture …` command
-    // fails and the `|| console` resets to a clean full-screen text
-    // menu. Either way there's no ASCII placeholder anymore.
+    // menu text lands below it.
+    //
+    // v0.5.7: gate the whole command behind `iseq ${platform} efi`.
+    // `console --picture` needs IMAGE_PNG + CONSOLE_FRAMEBUFFER, which
+    // only our from-source UEFI binaries carry (x86_64/arm64 UEFI — see
+    // deploy/docker/Dockerfile). The fetched BIOS `undionly.kpxe` has
+    // neither, and on legacy BIOS the `--picture` attempt misbehaves
+    // *before* the trailing `|| console` fallback can recover (it tries
+    // to set a framebuffer mode the BIOS console can't honour). Guarding
+    // on platform means BIOS clients never issue the command at all —
+    // they drop straight to the plain text menu — while UEFI clients
+    // still get the graphical background. A PNG-less UEFI build (e.g. the
+    // upstream i386-efi baseline) still falls back gracefully through the
+    // same `|| console`. No operator toggle needed; mixed BIOS+UEFI
+    // fleets each get the right treatment automatically.
     let _ = writeln!(
         s,
-        "console --picture {base}/branding/pxe-logo --top 290 || console"
+        "iseq ${{platform}} efi && console --picture {base}/branding/pxe-logo --top 290 || console"
     );
     // Map iPXE's ${{buildarch}} + ${{platform}} into the human form the
     // user asked for (e.g. "x86 BIOS", "x86_64 UEFI", "arm64 UEFI").
@@ -101,12 +109,13 @@ pub fn render_menu(isos: &[IsoMeta], settings: &Settings, base_url: &str) -> Str
     } else {
         let _ = writeln!(s, "item --gap -- (no Linux ISOs uploaded)");
     }
-    if settings.windows_enabled && has_family(isos, is_windows_family) {
+    // v0.5.8: Windows just works — no Settings toggle. Show the Windows
+    // installers submenu whenever a Windows ISO is present; entries boot
+    // via HTTP sanboot of the raw ISO, so no SMB/extraction is required.
+    if has_family(isos, is_windows_family) {
         let _ = writeln!(s, "item windows          Windows Installers  >");
-    } else if settings.windows_enabled {
-        let _ = writeln!(s, "item --gap -- (no Windows ISOs uploaded)");
     } else {
-        let _ = writeln!(s, "item --gap -- (Windows support disabled in Settings)");
+        let _ = writeln!(s, "item --gap -- (no Windows ISOs uploaded)");
     }
     let _ = writeln!(
         s,

crates/http-api/src/snapshots/openpxe_http_api__ipxe_script__password_tests__render_menu_snapshot.snap

@@ -7,7 +7,7 @@ expression: rendered
 set base-url http://10.0.0.5
 set esc:hex 1b
 set cls ${esc:string}[2J
-console --picture http://10.0.0.5/branding/pxe-logo --top 290 || console
+iseq ${platform} efi && console --picture http://10.0.0.5/branding/pxe-logo --top 290 || console
 set arch-label ${buildarch} ${platform}
 iseq ${buildarch} i386   && iseq ${platform} pcbios && set arch-label x86 BIOS         || iseq ${buildarch} x86_64 && iseq ${platform} efi    && set arch-label x86_64 UEFI      || iseq ${buildarch} arm64  && iseq ${platform} efi    && set arch-label arm64 UEFI       || true
 :menu
@@ -17,7 +17,7 @@ item --gap -- ------------------------- Default -------------------------
 item local            Boot from Local HDD
 item --gap -- ----------------------- Installers -----------------------
 item --gap -- (no Linux ISOs uploaded)
-item --gap -- (Windows support disabled in Settings)
+item --gap -- (no Windows ISOs uploaded)
 item --gap -- -------------------------- Tools --------------------------
 item tools            Tools  >
 item --gap -- ---------------------- Queued Deployment ---------------------

crates/http-api/tests/full_flow.rs

@@ -693,7 +693,7 @@ async fn log_recent_returns_buffered_lines() {
 }
 
 #[tokio::test]
-async fn windows_iso_renders_clean_wimboot_script_with_no_trust_store_writes() {
+async fn windows_iso_renders_clean_sanboot_script_with_no_trust_store_writes() {
     // Synthesize an ISO with a Windows volume label + the sources/boot.wim
     // sentinel so introspection labels it WindowsPe with has_boot_wim.
     let mut buf = vec![0u8; 32 * 2048];
@@ -763,38 +763,35 @@ async fn windows_iso_renders_clean_wimboot_script_with_no_trust_store_writes() {
         "introspection should detect sources/boot.wim sentinel"
     );
 
-    // The boot entry should be a wimboot kind with the canonical 5-file
-    // chain documented in the LinusTechTips iPXE-Windows guide.
+    // v0.5.8: Windows boots via iPXE HTTP sanboot of the raw ISO — no SMB,
+    // no extraction, no in-ISO file serving, no operator toggle. The boot
+    // entry is a `san_boot_iso` kind pointing at the raw image.
     let entry = &meta["boot_entries"][0];
-    assert_eq!(entry["kind"]["kind"], "wimboot");
-    let files = entry["kind"]["files"].as_array().unwrap();
-    let names: Vec<&str> = files.iter().map(|f| f[0].as_str().unwrap()).collect();
-    assert!(names.contains(&"bootmgr"));
-    assert!(names.contains(&"bootmgr.efi"));
-    assert!(names.contains(&"bcd"));
-    assert!(names.contains(&"boot.sdi"));
-    assert!(names.contains(&"boot.wim"));
+    assert_eq!(entry["kind"]["kind"], "san_boot_iso");
+    let iso_url = entry["kind"]["iso_url"].as_str().unwrap();
+    assert!(
+        std::path::Path::new(iso_url)
+            .extension()
+            .is_some_and(|e| e.eq_ignore_ascii_case("iso")),
+        "sanboot should target the raw ISO, got: {iso_url}"
+    );
 
     // Render the entry script and verify:
-    //   1. It uses wimboot
-    //   2. All 5 files are referenced via `initrd --name`
-    //   3. NO trust-store / driver / testsigning operations slip in
+    //   1. It uses `sanboot` against the raw ISO over HTTP
+    //   2. NO trust-store / driver / testsigning operations slip in
     let entry_id = entry["id"].as_str().unwrap();
     let url = format!("/boot/{entry_id}.ipxe");
     let (s, body) = get(&app, &url).await;
     assert_eq!(s, StatusCode::OK);
     let script = String::from_utf8(body).unwrap();
-    assert!(script.contains("kernel "), "missing kernel line:\n{script}");
     assert!(
-        script.contains("ipxe/wimboot"),
-        "missing wimboot loader:\n{script}"
+        script.contains("sanboot"),
+        "missing sanboot line:\n{script}"
+    );
+    assert!(
+        script.contains(&format!("/{iso_url}")),
+        "sanboot should reference the raw ISO url:\n{script}"
     );
-    for tag in ["bootmgr", "bootmgr.efi", "bcd", "boot.sdi", "boot.wim"] {
-        assert!(
-            script.contains(&format!("initrd --name {tag}")),
-            "missing `initrd --name {tag}` line:\n{script}"
-        );
-    }
     // Hard guarantees we never want to see in any client-facing script.
     let lower = script.to_lowercase();
     for forbidden in [

crates/iso-store/src/entry.rs

@@ -25,9 +25,11 @@ pub enum BootKind {
         wimboot_url: String,
         files: Vec<(String, String)>,
     },
-    /// Last-resort: SAN-boot the ISO as an emulated CD. Only works for small
-    /// ISOs (<~1 GiB) and older distros. Kept for completeness, not the
-    /// default.
+    /// SAN-boot the raw ISO as an emulated CD (iPXE `sanboot`). The emulated
+    /// CD is backed by on-demand HTTP range reads, so ISO size is *not* a
+    /// constraint — this is the primary path for Windows (v0.5.8) and for any
+    /// El Torito-bootable image we don't special-case: ESXi/VMvisor
+    /// installers, BSDs, firmware/diagnostic tools, custom spins (v0.6.0).
     SanBootIso { iso_url: String },
 }
 

crates/iso-store/src/introspect.rs

@@ -13,7 +13,7 @@ use serde::{Deserialize, Serialize};
 use std::io::{Read, Seek, SeekFrom};
 use std::path::Path;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
 #[serde(rename_all = "snake_case")]
 pub enum DistroFamily {
     DebianUbuntu,
@@ -22,10 +22,22 @@ pub enum DistroFamily {
     Arch,
     Alpine,
     WindowsPe,
+    #[default]
     Unknown,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+/// Bumped whenever the introspection logic changes in a way that should
+/// re-classify already-uploaded ISOs. On startup the store re-runs
+/// `introspect` on any *local* ISO whose persisted report predates this
+/// revision (see `IsoStore::load_from_disk`), so an upgrade fixes stale
+/// metadata — e.g. a Windows 11 ISO tagged `Unknown` by an older binary —
+/// without the operator having to delete and re-upload it.
+///
+/// rev 1 (v0.5.9): added El Torito boot-catalog detection + broadened
+/// Windows (UDF/UTF-16) detection becomes retroactive.
+pub const INTROSPECT_REV: u32 = 1;
+
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct IntrospectionReport {
     pub family: DistroFamily,
     pub volume_label: Option<String>,
@@ -35,17 +47,28 @@ pub struct IntrospectionReport {
     pub initrd_paths: Vec<String>,
     /// True if `sources/boot.wim` present — Windows install media.
     pub has_boot_wim: bool,
+    /// True if the ISO carries an El Torito boot catalog — i.e. it is
+    /// bootable by BIOS/UEFI firmware and therefore by iPXE `sanboot`
+    /// (emulated CD). This is the authoritative "can this boot at all?"
+    /// signal for ISOs we can't classify as Linux or Windows (BSDs, ESXi,
+    /// firmware tools, custom spins). A *data* ISO (e.g. a VMware vCenter
+    /// appliance bundle) has no boot catalog and reports `false`. v0.5.9.
+    #[serde(default)]
+    pub el_torito: bool,
+    /// Revision of the introspection logic that produced this report. Old
+    /// `meta.json` files without the field deserialize as 0, which is
+    /// below [`INTROSPECT_REV`], triggering a one-time re-introspect on
+    /// the next startup. v0.5.9.
+    #[serde(default)]
+    pub introspect_rev: u32,
 }
 
 /// Probe an ISO file on disk. Never fails — on unrecoverable IO error we log
 /// and return an `Unknown` family so the uploader still sees a record.
 pub fn introspect(path: &Path) -> IntrospectionReport {
     let mut report = IntrospectionReport {
-        family: DistroFamily::Unknown,
-        volume_label: None,
-        kernel_path: None,
-        initrd_paths: Vec::new(),
-        has_boot_wim: false,
+        introspect_rev: INTROSPECT_REV,
+        ..Default::default()
     };
 
     let Ok(mut f) = std::fs::File::open(path) else {
@@ -68,6 +91,11 @@ pub fn introspect(path: &Path) -> IntrospectionReport {
         }
     }
 
+    // Does the ISO have an El Torito boot catalog? This is what decides
+    // whether an ISO we *can't* otherwise classify is bootable at all —
+    // a bootable ISO sanboots; a data/appliance ISO (no catalog) can't.
+    report.el_torito = detect_el_torito(&mut f);
+
     // Cheap content scan: read the first ~64 MiB, look for signature filenames.
     // This is enough to identify `sources/boot.wim` (Windows) and common
     // kernel/initrd paths for the major Linux distros.
@@ -85,12 +113,37 @@ pub fn introspect(path: &Path) -> IntrospectionReport {
         read_total += n;
     }
 
+    // `sources/boot.wim` is the definitive Windows-install-media marker
+    // when the ISO exposes ASCII (ISO9660/Joliet) names. `contains_ascii`
+    // is case-insensitive, so one form covers BOOT.WIM / boot.wim and the
+    // backslash variant.
     if contains_ascii(&haystack, b"sources/boot.wim")
-        || contains_ascii(&haystack, b"SOURCES/BOOT.WIM")
-        || contains_ascii(&haystack, b"SOURCES\\BOOT.WIM")
+        || contains_ascii(&haystack, b"sources\\boot.wim")
     {
         report.has_boot_wim = true;
-        if report.family == DistroFamily::Unknown {
+        report.family = DistroFamily::WindowsPe;
+    }
+
+    // v0.5.8: broaden Windows detection. Modern Windows 10/11 ISOs are
+    // UDF — filenames are stored as UTF-16 (so the ASCII scan above misses
+    // them) and the volume label is a cryptic Microsoft string (so
+    // `family_from_label` misses it too). Booting is via HTTP sanboot of
+    // the raw ISO (no boot.wim extraction), so we only need the *family*.
+    // Catch the common cases: well-known Windows markers in either ASCII
+    // or UTF-16LE within the first 16 MiB, plus a filename hint.
+    if report.family == DistroFamily::Unknown {
+        let head = &haystack[..haystack.len().min(16 * 1024 * 1024)];
+        let ascii_markers: [&[u8]; 4] = [
+            b"bootmgr",
+            b"sources/install.wim",
+            b"sources/install.esd",
+            b"efi/microsoft",
+        ];
+        let utf16_markers = ["bootmgr", "boot.wim", "install.wim", "microsoft"];
+        let looks_windows = ascii_markers.iter().any(|m| contains_ascii(head, m))
+            || utf16_markers.iter().any(|m| contains_utf16le_ci(head, m))
+            || filename_looks_windows(path);
+        if looks_windows {
             report.family = DistroFamily::WindowsPe;
         }
     }
@@ -158,6 +211,83 @@ fn contains_ascii(haystack: &[u8], needle: &[u8]) -> bool {
         .any(|w| w.eq_ignore_ascii_case(needle))
 }
 
+/// Case-insensitive search for an ASCII string encoded as UTF-16LE — the
+/// way UDF (and thus modern Windows ISOs) store filenames. Each character
+/// is two bytes: the ASCII low byte (compared case-insensitively) followed
+/// by a 0 high byte. v0.5.8.
+fn contains_utf16le_ci(haystack: &[u8], ascii: &str) -> bool {
+    let n = ascii.len();
+    if n == 0 || haystack.len() < n * 2 {
+        return false;
+    }
+    let lower: Vec<u8> = ascii.bytes().map(|b| b.to_ascii_lowercase()).collect();
+    haystack.windows(n * 2).any(|w| {
+        lower
+            .iter()
+            .enumerate()
+            .all(|(i, &c)| w[i * 2 + 1] == 0 && w[i * 2].to_ascii_lowercase() == c)
+    })
+}
+
+/// Filename heuristic: a stock Windows ISO almost always carries an obvious
+/// token in its name (e.g. `..._windows_11_...`, `Win10`, `winserver`).
+/// Used only as a last-resort family hint when the content scan and volume
+/// label are inconclusive. v0.5.8.
+fn filename_looks_windows(path: &Path) -> bool {
+    let name = path
+        .file_name()
+        .and_then(|s| s.to_str())
+        .unwrap_or("")
+        .to_ascii_lowercase();
+    const TOKENS: [&str; 6] = [
+        "windows",
+        "winpe",
+        "win10",
+        "win11",
+        "winserver",
+        "win-server",
+    ];
+    TOKENS.iter().any(|t| name.contains(t))
+}
+
+/// The boot-system identifier string in an El Torito Boot Record Volume
+/// Descriptor (offset 7, NUL-padded to 32 bytes).
+const EL_TORITO_ID: &[u8] = b"EL TORITO SPECIFICATION";
+
+/// Detect an El Torito boot catalog — the marker that an ISO is bootable
+/// by BIOS/UEFI firmware (and thus by iPXE `sanboot`).
+///
+/// The ISO9660 Volume Descriptor Set starts at LBA 16 (offset 0x8000) and
+/// runs one 2048-byte descriptor per sector until a Set Terminator
+/// (type 0xFF). A Boot Record descriptor (type 0x00) whose 32-byte boot
+/// system identifier reads "EL TORITO SPECIFICATION" means the image
+/// declares an El Torito boot catalog. We only confirm its presence — we
+/// don't parse the catalog (sanboot/the firmware does that). The walk is
+/// capped so a malformed/huge image can't spin us. v0.5.9.
+fn detect_el_torito(f: &mut std::fs::File) -> bool {
+    let mut vd = [0u8; 2048];
+    for lba in 16u64..32 {
+        if f.seek(SeekFrom::Start(lba * 2048)).is_err() || f.read_exact(&mut vd).is_err() {
+            return false;
+        }
+        // Every descriptor in the set carries the "CD001" magic; once it's
+        // missing we've walked off the end of a valid set.
+        if &vd[1..6] != b"CD001" {
+            return false;
+        }
+        match vd[0] {
+            // Boot Record descriptor carrying the El Torito signature.
+            0x00 if vd[7..7 + EL_TORITO_ID.len()] == *EL_TORITO_ID => return true,
+            // Volume Descriptor Set Terminator — nothing bootable found.
+            0xFF => return false,
+            // Any other descriptor (incl. a non-El-Torito boot record) —
+            // keep walking the set.
+            _ => {}
+        }
+    }
+    false
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -179,4 +309,72 @@ mod tests {
         assert_eq!(family_from_label("ARCH_202604"), DistroFamily::Arch);
         assert_eq!(family_from_label("weird-custom"), DistroFamily::Unknown);
     }
+
+    #[test]
+    fn utf16le_marker_matches_case_insensitively() {
+        // "boot.wim" encoded UTF-16LE, mixed case — UDF stores Windows
+        // filenames this way, which the ASCII scan can't see.
+        let s = "BOOT.WIM";
+        let utf16: Vec<u8> = s.bytes().flat_map(|b| [b, 0]).collect();
+        let mut hay = vec![0u8; 8];
+        hay.extend_from_slice(&utf16);
+        hay.extend_from_slice(&[1, 2, 3]);
+        assert!(contains_utf16le_ci(&hay, "boot.wim"));
+        assert!(contains_utf16le_ci(&hay, "Boot.Wim"));
+        assert!(!contains_utf16le_ci(&hay, "install.wim"));
+        // An ASCII (not UTF-16) occurrence must NOT match the UTF-16 scan.
+        assert!(!contains_utf16le_ci(b"boot.wim plain ascii", "boot.wim"));
+    }
+
+    #[test]
+    fn el_torito_boot_catalog_detected() {
+        let dir = tempfile::tempdir().unwrap();
+        // Helper: stamp a 2048-byte descriptor at `lba` with type + magic.
+        let stamp = |img: &mut [u8], lba: usize, ty: u8| {
+            let off = lba * 2048;
+            img[off] = ty;
+            img[off + 1..off + 6].copy_from_slice(b"CD001");
+        };
+
+        // Bootable image: PVD @16, El Torito Boot Record @17, terminator @18.
+        let mut boot = vec![0u8; 2048 * 19];
+        stamp(&mut boot, 16, 0x01);
+        stamp(&mut boot, 17, 0x00);
+        boot[17 * 2048 + 7..17 * 2048 + 7 + EL_TORITO_ID.len()].copy_from_slice(EL_TORITO_ID);
+        stamp(&mut boot, 18, 0xFF);
+        let bp = dir.path().join("boot.iso");
+        std::fs::write(&bp, &boot).unwrap();
+        let mut f = std::fs::File::open(&bp).unwrap();
+        assert!(
+            detect_el_torito(&mut f),
+            "El Torito boot record should match"
+        );
+
+        // Data/appliance image: PVD @16, terminator @17, no boot record.
+        let mut data = vec![0u8; 2048 * 18];
+        stamp(&mut data, 16, 0x01);
+        stamp(&mut data, 17, 0xFF);
+        let dp = dir.path().join("data.iso");
+        std::fs::write(&dp, &data).unwrap();
+        let mut f2 = std::fs::File::open(&dp).unwrap();
+        assert!(!detect_el_torito(&mut f2), "data ISO has no boot catalog");
+    }
+
+    #[test]
+    fn filename_hint_catches_windows_isos() {
+        use std::path::Path;
+        assert!(filename_looks_windows(Path::new(
+            "en-us_windows_11_iot_enterprise_ltsc_2024_x64_dvd.iso"
+        )));
+        assert!(filename_looks_windows(Path::new(
+            "Win10_22H2_English_x64.iso"
+        )));
+        assert!(filename_looks_windows(Path::new("winserver2022.iso")));
+        assert!(!filename_looks_windows(Path::new(
+            "ubuntu-24.04-desktop.iso"
+        )));
+        assert!(!filename_looks_windows(Path::new(
+            "Rocky-9.4-x86_64-dvd.iso"
+        )));
+    }
 }

crates/iso-store/src/nfs_share.rs

@@ -57,7 +57,7 @@
 //! UI to ask for. (If a future server needs Kerberos or non-default
 //! uid mapping we can add those, but for ISO read access nobody does.)
 
-use crate::introspect::{DistroFamily, IntrospectionReport};
+use crate::introspect::IntrospectionReport;
 use crate::store::{generate_boot_entries_for, slugify_str, IsoSource, IsoStore};
 use bytes::Bytes;
 use nfs3_client::tokio::TokioConnector;
@@ -399,13 +399,7 @@ impl NfsShareManager {
             // Same approach as SMB: no real introspection over the
             // network in v0.4.67. The boot-entry generator falls back
             // to filename-based sanboot detection.
-            let report = IntrospectionReport {
-                family: DistroFamily::Unknown,
-                volume_label: None,
-                kernel_path: None,
-                initrd_paths: Vec::new(),
-                has_boot_wim: false,
-            };
+            let report = IntrospectionReport::default();
             let boot_entries = generate_boot_entries_for(&iso_id, &entry.filename, &report);
             let source = IsoSource::Nfs {
                 share_id: share.id.clone(),

crates/iso-store/src/sftp_share.rs

@@ -56,7 +56,7 @@
 //! hint}` error shape is shared so the storage tab renders all three
 //! protocols through one code path.
 
-use crate::introspect::{DistroFamily, IntrospectionReport};
+use crate::introspect::IntrospectionReport;
 use crate::store::{generate_boot_entries_for, slugify_str, IsoSource, IsoStore};
 use bytes::Bytes;
 use openpxe_core::{Error, Result};
@@ -480,13 +480,7 @@ impl SftpShareManager {
             // register `Unknown` and let the boot-entry generator fall
             // back to filename-based detection. SFTP *could* do bounded
             // PVD reads (it has random access) — a follow-up can add it.
-            let report = IntrospectionReport {
-                family: DistroFamily::Unknown,
-                volume_label: None,
-                kernel_path: None,
-                initrd_paths: Vec::new(),
-                has_boot_wim: false,
-            };
+            let report = IntrospectionReport::default();
             let boot_entries = generate_boot_entries_for(&iso_id, &entry.filename, &report);
             let source = IsoSource::Sftp {
                 share_id: share.id.clone(),

crates/iso-store/src/smb_share.rs

@@ -56,7 +56,7 @@
 //! streaming. A follow-up release can add libsmbclient-based seek if
 //! a real workload needs it.
 
-use crate::introspect::{DistroFamily, IntrospectionReport};
+use crate::introspect::IntrospectionReport;
 use crate::store::{generate_boot_entries_for, slugify_str, IsoSource, IsoStore};
 use openpxe_core::{Error, Result};
 use parking_lot::Mutex;
@@ -470,13 +470,7 @@ impl SmbShareManager {
             // and the operator gets *something* bootable. A follow-up
             // release can do a bounded `smbclient get` of the first
             // 64 KiB for real detection.
-            let report = IntrospectionReport {
-                family: DistroFamily::Unknown,
-                volume_label: None,
-                kernel_path: None,
-                initrd_paths: Vec::new(),
-                has_boot_wim: false,
-            };
+            let report = IntrospectionReport::default();
             let boot_entries = generate_boot_entries_for(&iso_id, &entry.filename, &report);
             let source = IsoSource::Smb {
                 share_id: share.id.clone(),

crates/iso-store/src/store.rs

@@ -223,7 +223,8 @@ impl IsoStore {
                 continue;
             }
             if let Ok(text) = tokio::fs::read_to_string(&p).await {
-                if let Ok(meta) = serde_json::from_str::<IsoMeta>(&text) {
+                if let Ok(mut meta) = serde_json::from_str::<IsoMeta>(&text) {
+                    self.reintrospect_if_stale(&mut meta).await;
                     self.insert(meta);
                 }
             }
@@ -231,6 +232,46 @@ impl IsoStore {
         Ok(())
     }
 
+    /// v0.5.9: re-run introspection on a *local* ISO whose persisted report
+    /// predates the current logic. ISOs uploaded by an older binary carry a
+    /// stale family/boot profile — most visibly a Windows 11 ISO tagged
+    /// `Unknown` before the UDF/El-Torito detection landed, which then shows
+    /// as "won't boot" forever. Re-probing on startup fixes them in place,
+    /// no delete-and-re-upload. Bounded: only `Local` sources (we have the
+    /// bytes locally) below [`introspect::INTROSPECT_REV`], so it runs at
+    /// most once per ISO per upgrade. The probe reads up to ~64 MiB, so we
+    /// push it onto the blocking pool to keep the async runtime responsive.
+    async fn reintrospect_if_stale(&self, meta: &mut IsoMeta) {
+        if !matches!(meta.source, IsoSource::Local)
+            || meta.introspection.introspect_rev >= crate::introspect::INTROSPECT_REV
+        {
+            return;
+        }
+        let path = self.iso_path(&meta.id);
+        if !path.exists() {
+            return;
+        }
+        let Ok(fresh) = tokio::task::spawn_blocking(move || introspect(&path)).await else {
+            tracing::warn!(target: "openpxe::iso", id = %meta.id, "re-introspect task failed");
+            return;
+        };
+        let before = meta.introspection.family;
+        meta.introspection = fresh;
+        meta.boot_entries = generate_boot_entries(&meta.id, &meta.filename, &meta.introspection);
+        if let Err(e) = self.persist_meta(meta).await {
+            tracing::warn!(target: "openpxe::iso", id = %meta.id, "re-introspect persist: {e}");
+            return;
+        }
+        tracing::info!(
+            target: "openpxe::iso",
+            id = %meta.id,
+            from = ?before,
+            to = ?meta.introspection.family,
+            el_torito = meta.introspection.el_torito,
+            "re-introspected stale ISO metadata"
+        );
+    }
+
     fn insert(&self, meta: IsoMeta) {
         self.inner.write().isos.insert(meta.id.clone(), meta);
     }
@@ -557,22 +598,22 @@ fn generate_boot_entries(id: &str, filename: &str, r: &IntrospectionReport) -> V
         .clone()
         .unwrap_or_else(|| filename.to_string());
     match r.family {
-        DistroFamily::WindowsPe if r.has_boot_wim => {
-            // Standard wimboot chain. Paths are in-ISO; the HTTP layer maps
-            // `iso/<id>/<path>` to on-disk extraction via ISO9660 lookup.
-            let base = format!("iso/{id}");
+        DistroFamily::WindowsPe => {
+            // v0.5.8: boot Windows directly via iPXE HTTP sanboot. iPXE
+            // exposes the raw ISO as an emulated CD backed by on-demand
+            // HTTP range reads, and Windows Setup boots from it. This
+            // replaces the old wimboot+SMB chain, which (a) needed an SMB
+            // server the host often can't provide (port 445 collisions),
+            // (b) served in-ISO files via an ISO9660 lookup that failed on
+            // UDF-only Windows 11 ISOs, and (c) required an operator
+            // toggle. sanboot needs none of that — just the HTTP port,
+            // which works in any environment. The unmodified, stock ISO is
+            // served at iso/<id>.iso; nothing is injected into Windows.
             vec![BootEntry {
-                id: format!("{id}-winpe"),
-                title: format!("{title} (Windows / wimboot)"),
-                kind: BootKind::Wimboot {
-                    wimboot_url: "ipxe/wimboot".to_string(),
-                    files: vec![
-                        ("bootmgr".into(), format!("{base}/bootmgr")),
-                        ("bootmgr.efi".into(), format!("{base}/bootmgr.efi")),
-                        ("bcd".into(), format!("{base}/boot/bcd")),
-                        ("boot.sdi".into(), format!("{base}/boot/boot.sdi")),
-                        ("boot.wim".into(), format!("{base}/sources/boot.wim")),
-                    ],
+                id: format!("{id}-windows"),
+                title: format!("{title} (Windows)"),
+                kind: BootKind::SanBootIso {
+                    iso_url: format!("iso/{id}.iso"),
                 },
             }]
         }
@@ -598,15 +639,33 @@ fn generate_boot_entries(id: &str, filename: &str, r: &IntrospectionReport) -> V
             }]
         }
         _ => {
-            // Last-resort SAN boot. Won't work for large modern ISOs, but
-            // lets the ISO at least appear in the menu.
-            vec![BootEntry {
-                id: format!("{id}-sanboot"),
-                title: format!("{title} (SAN boot — may fail for >1GiB ISOs)"),
-                kind: BootKind::SanBootIso {
-                    iso_url: format!("iso/{id}.iso"),
-                },
-            }]
+            // No Windows-install media and no Linux kernel/initrd. Decide
+            // whether the ISO is bootable at all (v0.6.0):
+            //   * `el_torito` — it carries a boot catalog, so iPXE sanboots
+            //     the raw image as an emulated CD: BSDs, ESXi/VMvisor
+            //     installers, firmware tools, custom spins. The emulated CD
+            //     is backed by HTTP range reads, so ISO size is a non-issue
+            //     (this is the same path Windows uses since v0.5.8) — hence
+            //     no more "may fail for >1GiB ISOs" disclaimer.
+            //   * `introspect_rev == 0` — a remote-share ISO we couldn't
+            //     introspect (SMB/NFS/SFTP listings don't seek into the ISO).
+            //     Offer sanboot optimistically rather than hide a
+            //     likely-bootable installer.
+            // Otherwise it's a local image we *did* introspect and found to
+            // carry no boot catalog — a data/appliance ISO (e.g. a VMware
+            // vCenter Server Appliance bundle). It genuinely cannot boot, so
+            // we expose no menu entry; the dashboard flags it instead.
+            if r.el_torito || r.introspect_rev == 0 {
+                vec![BootEntry {
+                    id: format!("{id}-sanboot"),
+                    title,
+                    kind: BootKind::SanBootIso {
+                        iso_url: format!("iso/{id}.iso"),
+                    },
+                }]
+            } else {
+                Vec::new()
+            }
         }
     }
 }
@@ -680,6 +739,49 @@ mod tests {
         assert!(!s.contains(" --- "), "stray ---: {s}");
     }
 
+    #[test]
+    fn boot_entries_respect_el_torito_and_source() {
+        use crate::introspect::INTROSPECT_REV;
+
+        // ESXi / VMvisor installer shape: bootable (carries an El Torito
+        // catalog) but not classifiable as Windows or Linux. Must yield a
+        // single sanboot entry so it's selectable + boots via emulated CD.
+        let esxi = IntrospectionReport {
+            family: DistroFamily::Unknown,
+            volume_label: Some("ESXI-7.0U3".into()),
+            el_torito: true,
+            introspect_rev: INTROSPECT_REV,
+            ..Default::default()
+        };
+        let e = generate_boot_entries("esxi", "VMware-VMvisor-Installer-7.0U3n.iso", &esxi);
+        assert_eq!(e.len(), 1, "ESXi should get exactly one boot entry");
+        assert!(matches!(e[0].kind, BootKind::SanBootIso { .. }));
+        // Clean title — no stale ">1GiB may fail" disclaimer.
+        assert!(!e[0].title.contains("may fail"), "title: {}", e[0].title);
+
+        // VCSA / data-appliance shape: locally introspected (rev set), no
+        // boot catalog, not Windows/Linux. Genuinely unbootable → no entry,
+        // so it stays out of the iPXE menu (the dashboard flags it instead).
+        let vcsa = IntrospectionReport {
+            family: DistroFamily::Unknown,
+            el_torito: false,
+            introspect_rev: INTROSPECT_REV,
+            ..Default::default()
+        };
+        assert!(
+            generate_boot_entries("vcsa", "VMware-VCSA-all-8.0.iso", &vcsa).is_empty(),
+            "data/appliance ISO must produce no boot entry"
+        );
+
+        // Remote-share ISO: never introspected (rev 0, no random access over
+        // SMB/NFS/SFTP). Assume bootable and offer sanboot rather than hide a
+        // likely-bootable installer.
+        let remote = IntrospectionReport::default();
+        let r = generate_boot_entries("remote", "unknown-remote.iso", &remote);
+        assert_eq!(r.len(), 1, "remote (uninspected) ISO keeps a sanboot entry");
+        assert!(matches!(r[0].kind, BootKind::SanBootIso { .. }));
+    }
+
     fn fake_meta(id: &str) -> IsoMeta {
         IsoMeta {
             id: id.into(),
@@ -687,13 +789,7 @@ mod tests {
             size_bytes: 0,
             sha256_hex: None,
             uploaded_at: OffsetDateTime::now_utc(),
-            introspection: IntrospectionReport {
-                family: DistroFamily::Unknown,
-                volume_label: None,
-                kernel_path: None,
-                initrd_paths: vec![],
-                has_boot_wim: false,
-            },
+            introspection: IntrospectionReport::default(),
             boot_entries: vec![],
             source: IsoSource::Local,
             password_hash: None,

crates/webui/src/app.js

@@ -160,19 +160,35 @@
   // tint borrowed from Bootimus v0.1.62. Returns {ok, reason}.
   function bootability(iso, settings) {
     const fam = iso.introspection.family;
-    const isWin = fam === 'windows_pe';
-    if (isWin && !settings.windows_enabled) {
-      return { ok: false, reason: 'Windows boot disabled in Settings' };
+    // v0.5.8: Windows ISOs boot via iPXE HTTP sanboot of the raw image —
+    // no Settings toggle, no SMB, no size limit. Always bootable.
+    if (fam === 'windows_pe') {
+      return { ok: true };
     }
-    if (!isWin && !iso.introspection.kernel_path && fam !== 'windows_pe') {
-      // Linux without a detected kernel falls through to sanboot which
-      // rarely works for >1 GiB ISOs.
-      if (iso.size_bytes > 1.5 * 1024 * 1024 * 1024) {
-        return { ok: false, reason: 'no kernel/initrd detected; ISO too large for sanboot fallback' };
-      }
-      return { ok: true, warn: 'no kernel detected — sanboot fallback may not work' };
+    // Linux with a detected kernel/initrd — direct kernel+initrd boot.
+    if (iso.introspection.kernel_path) {
+      return { ok: true };
     }
-    return { ok: true };
+    // v0.5.9: any other ISO that carries an El Torito boot catalog is
+    // bootable via iPXE sanboot (emulated CD) — BSDs, ESXi, firmware
+    // tools, custom Linux spins. This replaces the old "> 1.5 GB ⇒
+    // unbootable" size guess with the authoritative on-disk boot signal,
+    // so a large bootable ISO is no longer mislabeled and a Windows ISO
+    // re-introspected on upgrade lights up correctly.
+    if (iso.introspection.el_torito) {
+      return { ok: true, warn: 'generic bootable ISO — boots via sanboot (emulated CD)' };
+    }
+    // Remote-share ISOs aren't introspected (no random access over the
+    // network), so el_torito is unknown — assume bootable and let sanboot
+    // try rather than cry wolf.
+    const remote = iso.source && iso.source.kind && iso.source.kind !== 'local';
+    if (remote) {
+      return { ok: true, warn: 'remote ISO — not introspected; sanboot is attempted at boot' };
+    }
+    // Local ISO with no Windows/Linux boot files and no El Torito catalog:
+    // a data/appliance image (e.g. a VMware vCenter bundle), not a bootable
+    // installer.
+    return { ok: false, reason: 'data/appliance ISO — no El Torito boot catalog and no Windows/Linux installer files, so it can’t be PXE-booted' };
   }
 
   // v0.5.2: pretty label for an unattended file's detected kind.
@@ -288,14 +304,23 @@
         el('div', {class: 'card'}, el('div', {class: 'stat'}, [
           el('div', {class: 'label'}, 'Images available'),
           el('div', {class: 'value'}, String(isos.length)),
-          el('div', {class: 'trend'},
-            isos.filter(i => i.introspection.family === 'windows_pe').length + ' Windows · ' +
-            isos.filter(i => i.introspection.family !== 'windows_pe').length + ' Linux  ·  ' +
+          el('div', {class: 'trend'}, (() => {
+            // v0.5.9: count families honestly. Anything that isn't a known
+            // Linux family or Windows lands in "other" (data/appliance ISOs
+            // like VMware VCSA, or as-yet-unclassified images) instead of
+            // being lumped under "Linux".
+            const LINUX = ['debian_ubuntu', 'rhel_fedora', 'opensuse', 'arch', 'alpine'];
+            const win = isos.filter(i => i.introspection.family === 'windows_pe').length;
+            const lin = isos.filter(i => LINUX.includes(i.introspection.family)).length;
+            const other = isos.length - win - lin;
             // v0.4.67+v0.5.5: count all remote-share protocols. Label
             // generically since operators may use any mix of SMB/NFS/SFTP.
-            ((status.smb_share_reachable || 0) + (status.nfs_share_reachable || 0) + (status.sftp_share_reachable || 0)) +
-            ' remote share' +
-            (((status.smb_share_reachable || 0) + (status.nfs_share_reachable || 0) + (status.sftp_share_reachable || 0)) === 1 ? '' : 's')),
+            const remote = (status.smb_share_reachable || 0) + (status.nfs_share_reachable || 0) + (status.sftp_share_reachable || 0);
+            const parts = [win + ' Windows', lin + ' Linux'];
+            if (other > 0) parts.push(other + ' other');
+            parts.push(remote + ' remote share' + (remote === 1 ? '' : 's'));
+            return parts.join('  ·  ');
+          })()),
         ])),
         el('div', {class: 'card'}, el('div', {class: 'stat'}, [
           el('div', {class: 'label'}, 'Uptime'),
@@ -340,7 +365,7 @@
       const settings = status.settings;
       const problems = isos.map(i => ({i, b: bootability(i, settings)})).filter(x => !x.b.ok);
       const problemsBlock = problems.length ? el('div', {class:'card'}, [
-        el('header', {}, [el('h2', {}, 'Images that won\'t boot with current settings')]),
+        el('header', {}, [el('h2', {}, 'Non-bootable images')]),
         el('div', {class:'body'},
           problems.map(({i, b}) => el('div', {class:'row-warn'},
             '⚠ ' + i.filename + ' — ' + b.reason)))
@@ -533,6 +558,9 @@
                                 style:'display:none', id:'file'});
       const prog = el('div', {class:'progress', id:'prog'}, el('div', {class:'bar', id:'bar'}));
       const upMsg = el('div', {class:'msg', id:'upmsg'});
+      // v0.5.8: cancel button — shown only while an upload is in flight.
+      const cancelUpload = el('button', {class:'danger', type:'button',
+        style:'display:none;margin-top:12px', id:'cancel-upload'}, 'Cancel upload');
 
       drop.onclick = () => file.click();
       drop.addEventListener('dragover', e => { e.preventDefault(); drop.classList.add('hover'); });
@@ -575,6 +603,16 @@
         };
 
         let uploadId = null;
+        // v0.5.8: cancel + leave-page guard. The AbortController stops the
+        // in-flight chunk; the beforeunload listener warns the operator
+        // that navigating away aborts the upload (the server-side partial
+        // is then cleaned up by the DELETE in the catch below).
+        const ac = new AbortController();
+        let canceled = false;
+        const warnLeave = (e) => { e.preventDefault(); e.returnValue = ''; return ''; };
+        window.addEventListener('beforeunload', warnLeave);
+        cancelUpload.style.display = '';
+        cancelUpload.onclick = () => { canceled = true; ac.abort(); };
         setStatus('Preparing upload for ' + f.name + ' (' + fmtBytes(f.size) + ')');
         prog.classList.add('active');
         bar.style.width = '1%';
@@ -601,6 +639,7 @@
                 'x-openpxe-upload-complete': complete ? 'true' : 'false',
               },
               body: f.slice(offset, end),
+              signal: ac.signal,
             });
             if (!r.ok) throw new Error(await failText(r));
             const j = await r.json();
@@ -616,8 +655,15 @@
             try { await fetch('/api/uploads/' + encodeURIComponent(uploadId), {method: 'DELETE'}); }
             catch {}
           }
-          setStatus('Upload failed: ' + (err && err.message ? err.message : String(err)), 'err');
+          if (canceled || (err && err.name === 'AbortError')) {
+            setStatus('Upload canceled — partial file discarded.', '');
+          } else {
+            setStatus('Upload failed: ' + (err && err.message ? err.message : String(err)), 'err');
+          }
         } finally {
+          window.removeEventListener('beforeunload', warnLeave);
+          cancelUpload.style.display = 'none';
+          cancelUpload.onclick = null;
           prog.classList.remove('active');
           if (!upMsg.className.includes('ok')) bar.style.width = '0';
         }
@@ -629,7 +675,11 @@
       // *next* row of the table. Keeps the markup flat and avoids the
       // overhead of a real modal.
       const rowsAndEditors = [];
-      isos.forEach(i => {
+      // v0.5.8: list Available images alphabetically by filename
+      // (case-insensitive, natural numeric order) instead of newest-first.
+      const sortedIsos = [...isos].sort((a, b) =>
+        (a.filename || '').localeCompare(b.filename || '', undefined, { sensitivity: 'base', numeric: true }));
+      sortedIsos.forEach(i => {
         const b = bootability(i, settings);
         // v0.4.65: SMB userspace consumer (smbclient).
         // v0.4.67: NFS back as in-process Rust client (nfs3_client).
@@ -1164,7 +1214,7 @@
         diskCard,
         el('div', {class:'card'}, [
           el('header', {}, el('h2', {}, 'Upload ISO')),
-          el('div', {class:'body'}, [drop, file, prog, upMsg]),
+          el('div', {class:'body'}, [drop, file, prog, upMsg, cancelUpload]),
         ]),
         // v0.5.1: SMB + NFS unified into one "Remote shares" card with a
         // protocol dropdown. Backend endpoints are unchanged; this is a
@@ -2252,7 +2302,9 @@
     // own self-contained <form>; when SSO is enabled, a distinct
     // "Sign in with …" button sits below a divider — the credential
     // fields no longer double as the SSO trigger.
-    const ssoLive = ssoConfig && ssoConfig.enabled && (ssoConfig.metadata_url || ssoConfig.metadata);
+    // `enabled` from /api/me already means "usable" (enabled AND a metadata
+    // source is configured), so the button only shows when SSO will work.
+    const ssoLive = !!(ssoConfig && ssoConfig.enabled);
     const ssoBlock = ssoLive
       ? el('div', {class:'sso-block'}, [
           el('div', {class:'auth-divider'}, el('span', {}, 'or')),
@@ -2497,10 +2549,12 @@
         ])));
       return;
     }
-    // Preload the SSO config so the login card can offer the operator
-    // an "Sign in with X" button when configured. Failure is harmless.
-    try { ssoConfig = await fetch('/api/sso').then(r => r.ok ? r.json() : null); }
-    catch { ssoConfig = null; }
+    // v0.5.9: the login card's "Sign in with …" button keys off the SSO
+    // descriptor that /api/me now carries (public, non-sensitive: enabled
+    // + idp_name + idp_logo_url). It's available signed in or out, so the
+    // button is static — it no longer relied on the auth-gated /api/sso,
+    // which 401s pre-auth and made the button vanish on fresh login loads.
+    ssoConfig = me.sso || null;
 
     if (me.setup_required) {
       showAuthScreen('setup');