From fc99973ac3f9ed72d90de8f6186282367182c863 Mon Sep 17 00:00:00 2001
From: Miles Ward <miles@milesward.dev>
Date: Fri, 29 May 2026 14:34:20 -0400
Subject: [PATCH] v0.5.0: Wake-on-LAN, webhook notifications, Advanced tab,
 login logo, update check
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Closes the v0.4.x chapter — NFS works end to end. Five additions:

## Wake-on-LAN (Hosts → Bound hosts)
- New core::wol module: parse any MAC form, build the 102-byte magic
  packet, broadcast it. No special capability needed (ephemeral source
  port; SO_BROADCAST). Sends to the limited broadcast (255.255.255.255)
  AND the server's own subnet broadcast (computed from advertised IP +
  detected mask) so it reaches the right VLAN.
- POST /api/hosts/:mac/wol — only fires for *bound* MACs (404 otherwise)
  so it's not an open packet sprayer.
- Bound-hosts table grows a "Wake" button with inline Waking…/Sent ✓
  state.

## Webhook notifications (Advanced tab)
- core::notify: NotifyConfig + NotifyStore (notify.json), one provider
  at a time — Slack / Discord / Teams (incoming-webhook JSON) or SMTP.
  SMTP password is persisted but redacted on GET behind a __keep__
  sentinel the UI round-trips so the secret never leaves the box.
- http-api::notify: delivery — reqwest POST for chat (provider-shaped
  bodies), lettre for SMTP (rustls, STARTTLS/implicit TLS, no plaintext).
  10s timeout; every send is best-effort.
- GET/PUT /api/notify, POST /api/notify/test.
- Fired fire-and-forget on the canonical "machine is imaging" boot event
  and on WoL — never blocks the boot path.

## UI: Advanced tab
- New nav item. Holds the webhook config card and the API reference
  block (relocated from the bottom of Settings).

## UI: login/setup logo (FleetDM treatment)
- /api/me now returns has_custom_logo + logo_rev (public bootstrap).
  The login, setup, and connection-error cards render the uploaded logo
  full-width with the "OpenPXE" wordmark dropped — matching the sidebar.

## About: update check + licenses
- "Check for updates" button → GET /api/updates/check queries the Gitea
  releases API (derived from CARGO_PKG_REPOSITORY) and compares to the
  running version. Strictly on-demand — no background polling, keeps the
  air-gapped promise.
- License card documents the MIT OR Apache-2.0 dual license with links,
  plus a note on bundled components (iPXE GPLv2/UBDL, samba, wimtools).

Deps: lettre (SMTP, rustls) + reqwest gains the json feature. Both
rustls so the static musl binary stays OpenSSL-free.

Tests: 179 passing (+notify round-trip/redaction, webhook validation,
WoL-unbound-404, WoL packet loopback, version-compare). clippy clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 Cargo.lock                         | 500 +++++++++++++++++++++++++++--
 Cargo.toml                         |   9 +-
 crates/core/src/lib.rs             |   3 +
 crates/core/src/notify.rs          | 362 +++++++++++++++++++++
 crates/core/src/wol.rs             | 210 ++++++++++++
 crates/http-api/Cargo.toml         |   6 +
 crates/http-api/src/app.rs         | 278 +++++++++++++++-
 crates/http-api/src/auth.rs        |  12 +
 crates/http-api/src/lib.rs         |   1 +
 crates/http-api/src/notify.rs      | 138 ++++++++
 crates/http-api/src/state.rs       |   6 +-
 crates/http-api/tests/full_flow.rs |  50 +++
 crates/openpxe/src/main.rs         |   2 +
 crates/webui/src/app.css           |   8 +
 crates/webui/src/app.js            | 292 +++++++++++++++--
 crates/webui/src/index.html        |   1 +
 16 files changed, 1817 insertions(+), 61 deletions(-)
 create mode 100644 crates/core/src/notify.rs
 create mode 100644 crates/core/src/wol.rs
 create mode 100644 crates/http-api/src/notify.rs

diff --git a/Cargo.lock b/Cargo.lock
index f3de7df..5b94f83 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -248,12 +248,28 @@ version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e748733b7cbc798e1434b6ac524f0c1ff2ab456fe201501e6497c8417a4fc33"
 
+[[package]]
+name = "cc"
+version = "1.2.63"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "556e016178bb5662a08681bbe0f00f8e17631781a4dfc8c45e466e4b185ec27f"
+dependencies = [
+ "find-msvc-tools",
+ "shlex",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
+
 [[package]]
 name = "cipher"
 version = "0.4.4"
@@ -369,8 +385,8 @@ dependencies = [
  "dhcproto-macros",
  "hex",
  "ipnet",
- "rand",
- "thiserror",
+ "rand 0.8.6",
+ "thiserror 1.0.69",
  "trust-dns-proto",
  "url",
 ]
@@ -402,6 +418,22 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "email-encoding"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9298e6504d9b9e780ed3f7dfd43a61be8cd0e09eb07f7706a945b0072b6670b6"
+dependencies = [
+ "base64",
+ "memchr",
+]
+
+[[package]]
+name = "email_address"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e079f19b08ca6239f47f8ba8509c11cf3ea30095831f7fed61441475edd8c449"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
@@ -454,6 +486,12 @@ dependencies = [
  "simd-adler32",
 ]
 
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
+
 [[package]]
 name = "flate2"
 version = "1.1.9"
@@ -590,8 +628,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
 dependencies = [
  "cfg-if",
+ "js-sys",
  "libc",
  "wasi",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "libc",
+ "r-efi 5.3.0",
+ "wasip2",
+ "wasm-bindgen",
 ]
 
 [[package]]
@@ -602,7 +656,7 @@ checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
 dependencies = [
  "cfg-if",
  "libc",
- "r-efi",
+ "r-efi 6.0.0",
  "wasip2",
  "wasip3",
 ]
@@ -682,6 +736,17 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hostname"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "617aaa3557aef3810a6369d0a99fac8a080891b68bd9f9812a1eeda0c0730cbd"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "windows-link",
+]
+
 [[package]]
 name = "http"
 version = "1.4.0"
@@ -752,6 +817,23 @@ dependencies = [
  "pin-project-lite",
  "smallvec",
  "tokio",
+ "want",
+]
+
+[[package]]
+name = "hyper-rustls"
+version = "0.27.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ca68d021ef39cf6463ab54c1d0f5daf03377b70561305bb89a8f83aab66e0f"
+dependencies = [
+ "http",
+ "hyper",
+ "hyper-util",
+ "rustls",
+ "tokio",
+ "tokio-rustls",
+ "tower-service",
+ "webpki-roots",
 ]
 
 [[package]]
@@ -760,13 +842,21 @@ version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96547c2556ec9d12fb1578c4eaf448b04993e7fb79cbaad930a656880a6bdfa0"
 dependencies = [
+ "base64",
  "bytes",
+ "futures-channel",
+ "futures-util",
  "http",
  "http-body",
  "hyper",
+ "ipnet",
+ "libc",
+ "percent-encoding",
  "pin-project-lite",
+ "socket2 0.6.3",
  "tokio",
  "tower-service",
+ "tracing",
 ]
 
 [[package]]
@@ -944,6 +1034,16 @@ version = "2.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d98f6fed1fde3f8c21bc40a1abb88dd75e67924f9cffc3ef95607bad8017f8e2"
 
+[[package]]
+name = "iri-string"
+version = "0.7.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "25e659a4bb38e810ebc252e53b5814ff908a8c58c2a9ce2fae1bbec24cbf4e20"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.2"
@@ -962,6 +1062,8 @@ version = "0.3.95"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2964e92d1d9dc3364cae4d718d93f227e3abb088e747d92e0395bfdedf1c12ca"
 dependencies = [
+ "cfg-if",
+ "futures-util",
  "once_cell",
  "wasm-bindgen",
 ]
@@ -978,6 +1080,34 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
 
+[[package]]
+name = "lettre"
+version = "0.11.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0da65617f6cb926332d039cb578aad56178da86e128db6a1b09f4c94fa5b3349"
+dependencies = [
+ "async-trait",
+ "base64",
+ "email-encoding",
+ "email_address",
+ "fastrand",
+ "futures-io",
+ "futures-util",
+ "hostname",
+ "httpdate",
+ "idna 1.1.0",
+ "mime",
+ "nom",
+ "percent-encoding",
+ "quoted_printable",
+ "rustls",
+ "socket2 0.6.3",
+ "tokio",
+ "tokio-rustls",
+ "url",
+ "webpki-roots",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.185"
@@ -1011,6 +1141,12 @@ version = "0.4.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
+[[package]]
+name = "lru-slab"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
+
 [[package]]
 name = "matchers"
 version = "0.2.0"
@@ -1133,6 +1269,15 @@ dependencies = [
  "nfs3_macros",
 ]
 
+[[package]]
+name = "nom"
+version = "8.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df9761775871bdef83bee530e60050f7e54b1105350d6884eb0fb4f46c2f9405"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -1171,7 +1316,7 @@ checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
 
 [[package]]
 name = "openpxe"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "axum",
@@ -1193,7 +1338,7 @@ dependencies = [
 
 [[package]]
 name = "openpxe-core"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "bcrypt",
@@ -1201,7 +1346,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "tokio",
  "toml",
@@ -1212,21 +1357,21 @@ dependencies = [
 
 [[package]]
 name = "openpxe-dhcp-proxy"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "bytes",
  "dhcproto",
  "openpxe-core",
  "socket2 0.5.10",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
 ]
 
 [[package]]
 name = "openpxe-http-api"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "axum",
@@ -1234,6 +1379,7 @@ dependencies = [
  "futures",
  "hyper",
  "image",
+ "lettre",
  "mime",
  "mime_guess",
  "openpxe-core",
@@ -1241,10 +1387,11 @@ dependencies = [
  "openpxe-iso-store",
  "openpxe-webui",
  "parking_lot",
+ "reqwest",
  "serde",
  "serde_json",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "tokio",
  "tokio-stream",
@@ -1257,17 +1404,17 @@ dependencies = [
 
 [[package]]
 name = "openpxe-ipxe-assets"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "openpxe-core",
  "rust-embed",
- "thiserror",
+ "thiserror 1.0.69",
  "tracing",
 ]
 
 [[package]]
 name = "openpxe-iso-store"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "bcrypt",
@@ -1284,7 +1431,7 @@ dependencies = [
  "serde_json",
  "sha2",
  "tempfile",
- "thiserror",
+ "thiserror 1.0.69",
  "time",
  "tokio",
  "tokio-util",
@@ -1294,21 +1441,21 @@ dependencies = [
 
 [[package]]
 name = "openpxe-tftp"
-version = "0.4.69"
+version = "0.5.0"
 dependencies = [
  "anyhow",
  "bytes",
  "openpxe-core",
  "openpxe-ipxe-assets",
  "socket2 0.5.10",
- "thiserror",
+ "thiserror 1.0.69",
  "tokio",
  "tracing",
 ]
 
 [[package]]
 name = "openpxe-webui"
-version = "0.4.69"
+version = "0.5.0"
 
 [[package]]
 name = "parking_lot"
@@ -1413,6 +1560,61 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 
+[[package]]
+name = "quinn"
+version = "0.11.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e20a958963c291dc322d98411f541009df2ced7b5a4f2bd52337638cfccf20"
+dependencies = [
+ "bytes",
+ "cfg_aliases",
+ "pin-project-lite",
+ "quinn-proto",
+ "quinn-udp",
+ "rustc-hash",
+ "rustls",
+ "socket2 0.6.3",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-proto"
+version = "0.11.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "434b42fec591c96ef50e21e886936e66d3cc3f737104fdb9b737c40ffb94c098"
+dependencies = [
+ "bytes",
+ "getrandom 0.3.4",
+ "lru-slab",
+ "rand 0.9.4",
+ "ring",
+ "rustc-hash",
+ "rustls",
+ "rustls-pki-types",
+ "slab",
+ "thiserror 2.0.18",
+ "tinyvec",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "quinn-udp"
+version = "0.5.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "addec6a0dcad8a8d96a771f815f0eaf55f9d1805756410b39f5fa81332574cbd"
+dependencies = [
+ "cfg_aliases",
+ "libc",
+ "once_cell",
+ "socket2 0.6.3",
+ "tracing",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.45"
@@ -1422,6 +1624,18 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "quoted_printable"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "478e0585659a122aa407eb7e3c0e1fa51b1d8a870038bd29f0cf4a8551eea972"
+
+[[package]]
+name = "r-efi"
+version = "5.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
 [[package]]
 name = "r-efi"
 version = "6.0.0"
@@ -1435,8 +1649,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ca0ecfa931c29007047d1bc58e623ab12e5590e8c7cc53200d5202b69266d8a"
 dependencies = [
  "libc",
- "rand_chacha",
- "rand_core",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44c5af06bb1b7d3216d91932aed5265164bf384dc89cd6ba05cf59a35f5f76ea"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -1446,7 +1670,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
 ]
 
 [[package]]
@@ -1458,6 +1692,15 @@ dependencies = [
  "getrandom 0.2.17",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.18"
@@ -1484,6 +1727,61 @@ version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc897dd8d9e8bd1ed8cdad82b5966c3e0ecae09fb1907d58efaa013543185d0a"
 
+[[package]]
+name = "reqwest"
+version = "0.12.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eddd3ca559203180a307f12d114c268abf583f59b03cb906fd0b3ff8646c1147"
+dependencies = [
+ "base64",
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-body-util",
+ "hyper",
+ "hyper-rustls",
+ "hyper-util",
+ "js-sys",
+ "log",
+ "percent-encoding",
+ "pin-project-lite",
+ "quinn",
+ "rustls",
+ "rustls-pki-types",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "sync_wrapper",
+ "tokio",
+ "tokio-rustls",
+ "tokio-util",
+ "tower",
+ "tower-http",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-streams",
+ "web-sys",
+ "webpki-roots",
+]
+
+[[package]]
+name = "ring"
+version = "0.17.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4689e6c2294d81e88dc6261c768b63bc4fcdb852be6d1352498b114f61383b7"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "getrandom 0.2.17",
+ "libc",
+ "untrusted",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "rust-embed"
 version = "8.11.0"
@@ -1519,6 +1817,12 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94300abf3f1ae2e2b8ffb7b58043de3d399c73fa6f4b73826402a5c457614dbe"
+
 [[package]]
 name = "rustix"
 version = "1.1.4"
@@ -1532,6 +1836,42 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.23.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef86cd5876211988985292b91c96a8f2d298df24e75989a43a3c73f2d4d8168b"
+dependencies = [
+ "log",
+ "once_cell",
+ "ring",
+ "rustls-pki-types",
+ "rustls-webpki",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-pki-types"
+version = "1.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30a7197ae7eb376e574fe940d068c30fe0462554a3ddbe4eca7838e049c937a9"
+dependencies = [
+ "web-time",
+ "zeroize",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.103.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61c429a8649f110dddef65e2a5ad240f747e85f7758a6bccc7e5777bd33f756e"
+dependencies = [
+ "ring",
+ "rustls-pki-types",
+ "untrusted",
+]
+
 [[package]]
 name = "rustversion"
 version = "1.0.22"
@@ -1660,6 +2000,12 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "shlex"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.8"
@@ -1759,6 +2105,9 @@ name = "sync_wrapper"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bf256ce5efdfa370213c1dabab5935a12e49f2c58d15e9eac2870d3b4f27263"
+dependencies = [
+ "futures-core",
+]
 
 [[package]]
 name = "synstructure"
@@ -1790,7 +2139,16 @@ version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
 dependencies = [
- "thiserror-impl",
+ "thiserror-impl 1.0.69",
+]
+
+[[package]]
+name = "thiserror"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4288b5bcbc7920c07a1149a35cf9590a2aa808e0bc1eafaade0b80947865fbc4"
+dependencies = [
+ "thiserror-impl 2.0.18",
 ]
 
 [[package]]
@@ -1804,6 +2162,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "thiserror-impl"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc4ee7f67670e9b64d05fa4253e753e016c6c95ff35b89b7941d6b856dec1d5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "thread_local"
 version = "1.1.9"
@@ -1897,6 +2266,16 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "tokio-rustls"
+version = "0.26.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1729aa945f29d91ba541258c8df89027d5792d85a8841fb65e8bf0f4ede4ef61"
+dependencies = [
+ "rustls",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-stream"
 version = "0.1.18"
@@ -1994,12 +2373,14 @@ dependencies = [
  "http-body-util",
  "http-range-header",
  "httpdate",
+ "iri-string",
  "mime",
  "mime_guess",
  "percent-encoding",
  "pin-project-lite",
  "tokio",
  "tokio-util",
+ "tower",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -2108,14 +2489,20 @@ dependencies = [
  "idna 0.2.3",
  "ipnet",
  "lazy_static",
- "rand",
+ "rand 0.8.6",
  "smallvec",
- "thiserror",
+ "thiserror 1.0.69",
  "tinyvec",
  "tracing",
  "url",
 ]
 
+[[package]]
+name = "try-lock"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
+
 [[package]]
 name = "typenum"
 version = "1.20.0"
@@ -2155,6 +2542,12 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
 
+[[package]]
+name = "untrusted"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
+
 [[package]]
 name = "url"
 version = "2.5.8"
@@ -2213,6 +2606,15 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.1+wasi-snapshot-preview1"
@@ -2250,6 +2652,16 @@ dependencies = [
  "wasm-bindgen-shared",
 ]
 
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f371d383f2fb139252e0bfac3b81b265689bf45b6874af544ffa4c975ac1ebf8"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.118"
@@ -2304,6 +2716,19 @@ dependencies = [
  "wasmparser",
 ]
 
+[[package]]
+name = "wasm-streams"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15053d8d85c7eccdbefef60f06769760a563c7f0a9d6902a13d35c7800b0ad65"
+dependencies = [
+ "futures-util",
+ "js-sys",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
 [[package]]
 name = "wasmparser"
 version = "0.244.0"
@@ -2316,6 +2741,35 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "web-sys"
+version = "0.3.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f2dfbb17949fa2088e5d39408c48368947b86f7834484e87b73de55bc14d97d"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "web-time"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52f5ee44c96cf55f1b349600768e3ece3a8f26010c05265ab73f945bb1a2eb9d"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "weezl"
 version = "0.1.12"
diff --git a/Cargo.toml b/Cargo.toml
index c8ff2ec..d226f2c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.4.69"
+version = "0.5.0"
 edition = "2021"
 rust-version = "1.95"
 license = "MIT OR Apache-2.0"
@@ -35,7 +35,7 @@ axum = { version = "0.7", features = ["macros", "multipart", "http2"] }
 tower = "0.5"
 tower-http = { version = "0.6", features = ["fs", "trace", "cors", "limit"] }
 hyper = "1.4"
-reqwest = { version = "0.12", default-features = false, features = ["rustls-tls", "stream"] }
+reqwest = { version = "0.12", default-features = false, features = ["rustls-tls", "stream", "json"] }
 mime = "0.3"
 mime_guess = "2.0"
 
@@ -66,6 +66,11 @@ rust-embed = { version = "8.5", features = ["include-exclude"] }
 nfs3_client = { version = "0.9", features = ["tokio"] }
 nfs3_types = "0.5"
 
+# v0.5.0: SMTP for webhook notifications (Slack/Teams/Discord go over
+# plain HTTP via reqwest; email needs a real SMTP client). rustls TLS
+# to match reqwest and stay musl-static-friendly — no OpenSSL.
+lettre = { version = "0.11", default-features = false, features = ["smtp-transport", "tokio1-rustls-tls", "builder", "hostname"] }
+
 openpxe-core = { path = "crates/core" }
 openpxe-dhcp-proxy = { path = "crates/dhcp-proxy" }
 openpxe-tftp = { path = "crates/tftp" }
diff --git a/crates/core/src/lib.rs b/crates/core/src/lib.rs
index 2efb705..a3813b7 100644
--- a/crates/core/src/lib.rs
+++ b/crates/core/src/lib.rs
@@ -12,9 +12,11 @@ pub mod error;
 pub mod host_bindings;
 pub mod log_bus;
 pub mod metrics;
+pub mod notify;
 pub mod queue;
 pub mod settings;
 pub mod sso;
+pub mod wol;
 
 pub use arch::{ClientArch, FirmwareClass};
 pub use auth::{AdminAccount, AdminPublic, AdminStore};
@@ -27,5 +29,6 @@ pub use error::{Error, Result};
 pub use host_bindings::{normalize_mac, HostBinding, HostBindings};
 pub use log_bus::{LogBus, LogBusLayer, LogLine};
 pub use metrics::{HttpRoute, Metrics};
+pub use notify::{NotifyConfig, NotifyKind, NotifyStore};
 pub use queue::{DeploymentQueue, QueueEntry};
 pub use settings::{Settings, SettingsStore, TimeoutAction};
diff --git a/crates/core/src/notify.rs b/crates/core/src/notify.rs
new file mode 100644
index 0000000..6d7c2f0
--- /dev/null
+++ b/crates/core/src/notify.rs
@@ -0,0 +1,362 @@
+//! Webhook / email notification configuration.
+//!
+//! v0.5.0: OpenPXE can ping a chat webhook or send an email when
+//! something noteworthy happens (a machine PXE-booted an image, a
+//! deployment was assigned, a WoL was sent). One active provider at a
+//! time, chosen by `kind` — dead-simple for an L1 tech: pick Slack,
+//! paste the incoming-webhook URL, done.
+//!
+//! This module owns only the *configuration* (validation + persistence
+//! to `<work_dir>/notify.json`). The actual sending — HTTP POST for the
+//! chat providers, SMTP for email — lives in the http-api crate, which
+//! already carries an HTTP client and the SMTP dependency. Keeping the
+//! network I/O out of `core` matches how `BrandingStore`/`SsoStore`
+//! stay pure config stores.
+//!
+//! Secrets note: the SMTP password is persisted in `notify.json`
+//! alongside the rest of the config (0644 like the other state files).
+//! It is never echoed back through the API — the snapshot used for the
+//! GET response blanks it (see `Self::redacted`).
+
+use parking_lot::RwLock;
+use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
+use std::sync::Arc;
+
+use crate::{Error, Result};
+
+const MAX_URL_LEN: usize = 2048;
+const MAX_FIELD_LEN: usize = 512;
+
+/// Which notification transport is active.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum NotifyKind {
+    /// Slack incoming webhook (`{ "text": ... }`).
+    #[default]
+    Slack,
+    /// Discord webhook (`{ "content": ... }`).
+    Discord,
+    /// Microsoft Teams incoming webhook (legacy MessageCard JSON).
+    Teams,
+    /// Email via SMTP.
+    Smtp,
+}
+
+impl NotifyKind {
+    /// True when this kind drives a chat webhook (POST a JSON body to a
+    /// single URL) rather than SMTP.
+    #[must_use]
+    pub fn is_webhook(self) -> bool {
+        matches!(self, Self::Slack | Self::Discord | Self::Teams)
+    }
+}
+
+/// Operator-configurable notification settings. Single provider active
+/// at a time; the inactive fields are kept so switching providers
+/// doesn't wipe the other one's values.
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct NotifyConfig {
+    #[serde(default)]
+    pub enabled: bool,
+    #[serde(default)]
+    pub kind: NotifyKind,
+    /// Incoming-webhook URL for Slack / Discord / Teams.
+    #[serde(default)]
+    pub webhook_url: String,
+
+    // ── SMTP fields (used when kind == Smtp) ──
+    #[serde(default)]
+    pub smtp_host: String,
+    #[serde(default = "default_smtp_port")]
+    pub smtp_port: u16,
+    #[serde(default)]
+    pub smtp_username: String,
+    #[serde(default)]
+    pub smtp_password: String,
+    /// `From:` address. Falls back to `smtp_username` when blank.
+    #[serde(default)]
+    pub smtp_from: String,
+    /// `To:` address (single recipient — keep it simple).
+    #[serde(default)]
+    pub smtp_to: String,
+    /// Use implicit TLS (port 465). When false we use STARTTLS on the
+    /// configured port (587 typical). Either way the connection is
+    /// encrypted — we never offer plaintext SMTP.
+    #[serde(default)]
+    pub smtp_implicit_tls: bool,
+}
+
+fn default_smtp_port() -> u16 {
+    587
+}
+
+impl NotifyConfig {
+    /// True when enabled and the active provider has the fields it
+    /// needs to actually send.
+    #[must_use]
+    pub fn is_usable(&self) -> bool {
+        if !self.enabled {
+            return false;
+        }
+        if self.kind.is_webhook() {
+            !self.webhook_url.trim().is_empty()
+        } else {
+            !self.smtp_host.trim().is_empty() && !self.smtp_to.trim().is_empty()
+        }
+    }
+
+    /// A copy safe to return over the API: the SMTP password is blanked
+    /// (replaced with a non-empty sentinel only when one is set, so the
+    /// UI can show "configured" without leaking it).
+    #[must_use]
+    pub fn redacted(&self) -> NotifyConfig {
+        let mut c = self.clone();
+        if !c.smtp_password.is_empty() {
+            c.smtp_password = SECRET_SENTINEL.to_string();
+        }
+        c
+    }
+}
+
+/// Returned by the API in place of a stored password. When the UI PUTs
+/// this value back unchanged we keep the existing password rather than
+/// overwriting it with the sentinel.
+pub const SECRET_SENTINEL: &str = "__keep__";
+
+/// In-memory + on-disk notification config registry.
+#[derive(Debug, Clone)]
+pub struct NotifyStore {
+    path: Arc<PathBuf>,
+    inner: Arc<RwLock<NotifyConfig>>,
+}
+
+impl NotifyStore {
+    #[must_use]
+    pub fn load_or_default(work_dir: &std::path::Path) -> Self {
+        let path = work_dir.join("notify.json");
+        let cfg = match std::fs::read_to_string(&path) {
+            Ok(text) => serde_json::from_str::<NotifyConfig>(&text).unwrap_or_else(|e| {
+                tracing::warn!(
+                    target: "openpxe::notify",
+                    "notify.json unreadable ({e}); starting with defaults"
+                );
+                NotifyConfig::default()
+            }),
+            Err(_) => NotifyConfig::default(),
+        };
+        Self {
+            path: Arc::new(path),
+            inner: Arc::new(RwLock::new(cfg)),
+        }
+    }
+
+    #[must_use]
+    pub fn snapshot(&self) -> NotifyConfig {
+        self.inner.read().clone()
+    }
+
+    /// Replace the whole config. `incoming.smtp_password == SECRET_SENTINEL`
+    /// is treated as "keep the existing password" so the UI never has to
+    /// round-trip the real secret.
+    pub fn replace(&self, mut incoming: NotifyConfig) -> Result<NotifyConfig> {
+        incoming.webhook_url = incoming.webhook_url.trim().to_string();
+        incoming.smtp_host = incoming.smtp_host.trim().to_string();
+        incoming.smtp_username = incoming.smtp_username.trim().to_string();
+        incoming.smtp_from = incoming.smtp_from.trim().to_string();
+        incoming.smtp_to = incoming.smtp_to.trim().to_string();
+
+        // Preserve the stored password when the UI sends the sentinel.
+        if incoming.smtp_password == SECRET_SENTINEL {
+            incoming
+                .smtp_password
+                .clone_from(&self.inner.read().smtp_password);
+        }
+
+        // Length caps.
+        if incoming.webhook_url.len() > MAX_URL_LEN {
+            return Err(Error::Invalid(format!(
+                "webhook URL exceeds {MAX_URL_LEN}-char cap"
+            )));
+        }
+        for (name, v) in [
+            ("smtp_host", &incoming.smtp_host),
+            ("smtp_username", &incoming.smtp_username),
+            ("smtp_from", &incoming.smtp_from),
+            ("smtp_to", &incoming.smtp_to),
+        ] {
+            if v.len() > MAX_FIELD_LEN {
+                return Err(Error::Invalid(format!(
+                    "{name} exceeds {MAX_FIELD_LEN}-char cap"
+                )));
+            }
+        }
+
+        // Validate the active provider only when enabling.
+        if incoming.enabled {
+            if incoming.kind.is_webhook() {
+                if incoming.webhook_url.is_empty() {
+                    return Err(Error::Invalid(
+                        "a webhook URL is required to enable chat notifications".into(),
+                    ));
+                }
+                if !incoming.webhook_url.starts_with("https://")
+                    && !incoming.webhook_url.starts_with("http://")
+                {
+                    return Err(Error::Invalid(
+                        "webhook URL must start with http:// or https://".into(),
+                    ));
+                }
+            } else {
+                if incoming.smtp_host.is_empty() {
+                    return Err(Error::Invalid(
+                        "SMTP host is required to enable email notifications".into(),
+                    ));
+                }
+                if incoming.smtp_to.is_empty() {
+                    return Err(Error::Invalid(
+                        "a recipient (To) is required to enable email notifications".into(),
+                    ));
+                }
+                if incoming.smtp_port == 0 {
+                    return Err(Error::Invalid("SMTP port must be non-zero".into()));
+                }
+            }
+        }
+
+        {
+            let mut g = self.inner.write();
+            *g = incoming.clone();
+        }
+        self.persist();
+        tracing::info!(
+            target: "openpxe::notify",
+            enabled = incoming.enabled, kind = ?incoming.kind,
+            "notification configuration updated"
+        );
+        Ok(incoming)
+    }
+
+    fn persist(&self) {
+        let snap = self.inner.read().clone();
+        let body = match serde_json::to_vec_pretty(&snap) {
+            Ok(b) => b,
+            Err(e) => {
+                tracing::warn!(target: "openpxe::notify", "serialize notify.json: {e}");
+                return;
+            }
+        };
+        if let Some(parent) = self.path.parent() {
+            let _ = std::fs::create_dir_all(parent);
+        }
+        let tmp = self.path.with_extension("json.tmp");
+        if let Err(e) = std::fs::write(&tmp, body) {
+            tracing::warn!(target: "openpxe::notify", "write notify.json tmp: {e}");
+            return;
+        }
+        if let Err(e) = std::fs::rename(&tmp, self.path.as_path()) {
+            tracing::warn!(target: "openpxe::notify", "rename notify.json: {e}");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::tempdir;
+
+    #[test]
+    fn default_disabled_not_usable() {
+        let dir = tempdir().unwrap();
+        let s = NotifyStore::load_or_default(dir.path());
+        assert!(!s.snapshot().enabled);
+        assert!(!s.snapshot().is_usable());
+    }
+
+    #[test]
+    fn slack_requires_url_when_enabled() {
+        let dir = tempdir().unwrap();
+        let s = NotifyStore::load_or_default(dir.path());
+        let r = s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Slack,
+            ..Default::default()
+        });
+        assert!(matches!(r, Err(Error::Invalid(_))));
+        s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Slack,
+            webhook_url: "https://hooks.slack.com/services/XXX".into(),
+            ..Default::default()
+        })
+        .unwrap();
+        assert!(s.snapshot().is_usable());
+    }
+
+    #[test]
+    fn smtp_requires_host_and_recipient() {
+        let dir = tempdir().unwrap();
+        let s = NotifyStore::load_or_default(dir.path());
+        let r = s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Smtp,
+            smtp_host: "smtp.example.com".into(),
+            ..Default::default()
+        });
+        assert!(matches!(r, Err(Error::Invalid(_))), "missing recipient should reject");
+        s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Smtp,
+            smtp_host: "smtp.example.com".into(),
+            smtp_port: 587,
+            smtp_to: "ops@example.com".into(),
+            smtp_from: "openpxe@example.com".into(),
+            ..Default::default()
+        })
+        .unwrap();
+        assert!(s.snapshot().is_usable());
+    }
+
+    #[test]
+    fn password_sentinel_preserves_stored_secret() {
+        let dir = tempdir().unwrap();
+        let s = NotifyStore::load_or_default(dir.path());
+        s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Smtp,
+            smtp_host: "smtp.example.com".into(),
+            smtp_port: 587,
+            smtp_to: "ops@example.com".into(),
+            smtp_password: "s3cret".into(),
+            ..Default::default()
+        })
+        .unwrap();
+        // Redacted snapshot hides the password behind the sentinel.
+        assert_eq!(s.snapshot().redacted().smtp_password, SECRET_SENTINEL);
+        // PUTting the sentinel back keeps the real password.
+        s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Smtp,
+            smtp_host: "smtp.example.com".into(),
+            smtp_port: 587,
+            smtp_to: "ops@example.com".into(),
+            smtp_password: SECRET_SENTINEL.into(),
+            ..Default::default()
+        })
+        .unwrap();
+        assert_eq!(s.snapshot().smtp_password, "s3cret");
+    }
+
+    #[test]
+    fn webhook_url_scheme_enforced() {
+        let dir = tempdir().unwrap();
+        let s = NotifyStore::load_or_default(dir.path());
+        let r = s.replace(NotifyConfig {
+            enabled: true,
+            kind: NotifyKind::Discord,
+            webhook_url: "ftp://example.com/hook".into(),
+            ..Default::default()
+        });
+        assert!(matches!(r, Err(Error::Invalid(_))));
+    }
+}
diff --git a/crates/core/src/wol.rs b/crates/core/src/wol.rs
new file mode 100644
index 0000000..d4b19dd
--- /dev/null
+++ b/crates/core/src/wol.rs
@@ -0,0 +1,210 @@
+//! Wake-on-LAN.
+//!
+//! v0.5.0: from the Hosts tab, an operator can wake a bound machine.
+//! WoL is a "magic packet" — six `0xFF` bytes followed by the target
+//! MAC repeated sixteen times (102 bytes total) — broadcast on the
+//! local segment. The NIC's WoL logic matches the repeated MAC and
+//! powers the board on.
+//!
+//! ## Why this is trivial and safe in our container
+//!
+//! - It's a single UDP datagram to a broadcast address. No privileged
+//!   *local* port is needed (we bind an ephemeral source port); the
+//!   destination port is conventionally 9 (discard) or 7 (echo), and
+//!   nothing actually listens there — the magic is in the payload, not
+//!   the port. So WoL works without any extra capability.
+//! - We send to the limited broadcast `255.255.255.255` (stays on the
+//!   local link) and, when the caller knows the server's own subnet
+//!   broadcast, to that too — directed broadcast reaches the right VLAN
+//!   even when the host bridges multiple segments.
+//!
+//! ## Limits
+//!
+//! WoL only crosses L2. If the target is on a different subnet than the
+//! OpenPXE host, the intervening router must be configured to forward
+//! directed broadcasts (most aren't, by design). For the common case —
+//! OpenPXE and its PXE clients on the same VLAN — the limited broadcast
+//! is enough.
+
+use crate::{Error, Result};
+use std::net::{Ipv4Addr, SocketAddrV4, UdpSocket};
+
+/// Conventional WoL destination port. 9 (discard) is the de-facto
+/// default; the port is immaterial since the match is on the payload.
+const WOL_PORT: u16 = 9;
+
+/// Parse a MAC string in any common form (`aa:bb:cc:dd:ee:ff`,
+/// `aa-bb-...`, `aabb.ccdd.eeff`, or bare hex) into six octets.
+///
+/// Returns `Error::Invalid` if it doesn't resolve to exactly six bytes.
+pub fn parse_mac(mac: &str) -> Result<[u8; 6]> {
+    // Strip every non-hex-digit, then expect exactly 12 hex chars.
+    let hex: String = mac.chars().filter(char::is_ascii_hexdigit).collect();
+    if hex.len() != 12 {
+        return Err(Error::Invalid(format!(
+            "invalid MAC '{mac}': expected 6 octets (12 hex digits), got {}",
+            hex.len()
+        )));
+    }
+    let mut out = [0u8; 6];
+    for (i, byte) in out.iter_mut().enumerate() {
+        // Each octet is two hex chars; unwrap is safe — we validated
+        // the length and that every char is a hex digit above.
+        *byte = u8::from_str_radix(&hex[i * 2..i * 2 + 2], 16)
+            .map_err(|e| Error::Invalid(format!("invalid MAC '{mac}': {e}")))?;
+    }
+    Ok(out)
+}
+
+/// Build the 102-byte magic packet for `mac`.
+#[must_use]
+pub fn magic_packet(mac: [u8; 6]) -> [u8; 102] {
+    let mut pkt = [0u8; 102];
+    // 6 bytes of 0xFF.
+    for b in &mut pkt[..6] {
+        *b = 0xFF;
+    }
+    // MAC repeated 16 times.
+    for rep in 0..16 {
+        let start = 6 + rep * 6;
+        pkt[start..start + 6].copy_from_slice(&mac);
+    }
+    pkt
+}
+
+/// Send a Wake-on-LAN magic packet for `mac` to every address in
+/// `broadcasts` (e.g. `255.255.255.255` plus the server's subnet
+/// broadcast). Returns the number of broadcast addresses the packet was
+/// successfully sent to; errors only if the MAC is malformed or the
+/// socket can't be opened at all.
+pub fn wake(mac: &str, broadcasts: &[Ipv4Addr]) -> Result<usize> {
+    let parsed = parse_mac(mac)?;
+    let packet = magic_packet(parsed);
+
+    // Always include the limited broadcast even if the caller didn't —
+    // it's the one that works with zero network configuration.
+    let mut targets: Vec<Ipv4Addr> = vec![Ipv4Addr::BROADCAST];
+    for b in broadcasts {
+        if !targets.contains(b) {
+            targets.push(*b);
+        }
+    }
+
+    let sent = send_magic(&packet, &targets, WOL_PORT)?;
+    tracing::info!(
+        target: "openpxe::wol",
+        mac = %mac, broadcasts = sent,
+        "Wake-on-LAN magic packet sent"
+    );
+    Ok(sent)
+}
+
+/// Open a broadcast-enabled UDP socket and send `packet` to every
+/// `target:port`. Returns how many sends succeeded. Errors if the
+/// socket can't be opened or if *no* target accepted the packet.
+fn send_magic(packet: &[u8], targets: &[Ipv4Addr], port: u16) -> Result<usize> {
+    // Bind an ephemeral local UDP port on all interfaces. SO_BROADCAST
+    // must be enabled to send to a broadcast address.
+    let sock = UdpSocket::bind(SocketAddrV4::new(Ipv4Addr::UNSPECIFIED, 0))
+        .map_err(|e| Error::Invalid(format!("could not open WoL socket: {e}")))?;
+    sock.set_broadcast(true)
+        .map_err(|e| Error::Invalid(format!("could not enable broadcast: {e}")))?;
+
+    let mut sent = 0usize;
+    for &addr in targets {
+        match sock.send_to(packet, SocketAddrV4::new(addr, port)) {
+            Ok(_) => sent += 1,
+            Err(e) => {
+                tracing::warn!(
+                    target: "openpxe::wol",
+                    broadcast = %addr,
+                    "WoL send failed: {e}"
+                );
+            }
+        }
+    }
+    if sent == 0 {
+        return Err(Error::Invalid(
+            "Wake-on-LAN: no broadcast address accepted the packet".into(),
+        ));
+    }
+    Ok(sent)
+}
+
+/// Compute the IPv4 broadcast address for `ip`/`mask`, if both parse.
+/// Used so the caller can include the server's own subnet broadcast
+/// alongside the limited broadcast.
+#[must_use]
+pub fn subnet_broadcast(ip: Ipv4Addr, mask: Ipv4Addr) -> Ipv4Addr {
+    let ip = u32::from(ip);
+    let mask = u32::from(mask);
+    Ipv4Addr::from(ip | !mask)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parse_mac_accepts_common_forms() {
+        let want = [0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff];
+        assert_eq!(parse_mac("aa:bb:cc:dd:ee:ff").unwrap(), want);
+        assert_eq!(parse_mac("AA-BB-CC-DD-EE-FF").unwrap(), want);
+        assert_eq!(parse_mac("aabb.ccdd.eeff").unwrap(), want);
+        assert_eq!(parse_mac("aabbccddeeff").unwrap(), want);
+    }
+
+    #[test]
+    fn parse_mac_rejects_bad_length() {
+        assert!(parse_mac("aa:bb:cc").is_err());
+        assert!(parse_mac("").is_err());
+        assert!(parse_mac("zz:bb:cc:dd:ee:ff").is_err()); // non-hex stripped → too short
+    }
+
+    #[test]
+    fn magic_packet_shape() {
+        let pkt = magic_packet([0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
+        assert_eq!(&pkt[..6], &[0xFF; 6]);
+        // First MAC repetition.
+        assert_eq!(&pkt[6..12], &[0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
+        // Last (16th) repetition ends the packet.
+        assert_eq!(&pkt[96..102], &[0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
+    }
+
+    #[test]
+    fn subnet_broadcast_computes() {
+        assert_eq!(
+            subnet_broadcast(
+                Ipv4Addr::new(192, 168, 1, 49),
+                Ipv4Addr::new(255, 255, 255, 0)
+            ),
+            Ipv4Addr::new(192, 168, 1, 255)
+        );
+        assert_eq!(
+            subnet_broadcast(
+                Ipv4Addr::new(10, 5, 3, 7),
+                Ipv4Addr::new(255, 255, 0, 0)
+            ),
+            Ipv4Addr::new(10, 5, 255, 255)
+        );
+    }
+
+    #[test]
+    fn send_magic_delivers_intact_packet_over_loopback() {
+        // Deterministic round-trip that doesn't depend on the sandbox
+        // permitting a real L2 broadcast: bind a receiver on loopback
+        // and confirm send_magic transmits the exact 102-byte packet.
+        let rx = UdpSocket::bind(SocketAddrV4::new(Ipv4Addr::LOCALHOST, 0)).unwrap();
+        let port = rx.local_addr().unwrap().port();
+        rx.set_read_timeout(Some(std::time::Duration::from_secs(2))).unwrap();
+
+        let packet = magic_packet([0x0a, 0x1b, 0x2c, 0x3d, 0x4e, 0x5f]);
+        let sent = send_magic(&packet, &[Ipv4Addr::LOCALHOST], port).unwrap();
+        assert_eq!(sent, 1);
+
+        let mut buf = [0u8; 128];
+        let n = rx.recv(&mut buf).unwrap();
+        assert_eq!(n, 102, "magic packet should be 102 bytes");
+        assert_eq!(&buf[..102], &packet[..]);
+    }
+}
diff --git a/crates/http-api/Cargo.toml b/crates/http-api/Cargo.toml
index dc94340..79214ac 100644
--- a/crates/http-api/Cargo.toml
+++ b/crates/http-api/Cargo.toml
@@ -34,6 +34,12 @@ mime_guess.workspace = true
 uuid.workspace = true
 # v0.4.5 Forms auth: lock-free session store and cookie helpers.
 parking_lot.workspace = true
+# v0.5.0: outbound HTTP for chat webhooks (Slack/Teams/Discord) and the
+# About-tab "check for updates" call to the Gitea releases API; SMTP for
+# email notifications. Both use rustls so the static musl binary stays
+# OpenSSL-free.
+reqwest.workspace = true
+lettre.workspace = true
 
 [dev-dependencies]
 tokio = { workspace = true, features = ["macros", "rt", "rt-multi-thread", "time"] }
diff --git a/crates/http-api/src/app.rs b/crates/http-api/src/app.rs
index d536227..6c07cbb 100644
--- a/crates/http-api/src/app.rs
+++ b/crates/http-api/src/app.rs
@@ -31,8 +31,8 @@ use axum::{
     Json, Router,
 };
 use openpxe_core::{
-    ext_for_mime, BootEvent, ClientEvent, Error, Settings, SsoConfig, ALLOWED_LOGO_MIMES,
-    MAX_LOGO_BYTES,
+    ext_for_mime, wol, BootEvent, ClientEvent, Error, NotifyConfig, Settings, SsoConfig,
+    ALLOWED_LOGO_MIMES, MAX_LOGO_BYTES,
 };
 use openpxe_ipxe_assets::asset_bytes;
 use openpxe_iso_store::{IsoCategory, IsoMeta, IsoSource, NfsAddRequest, SmbAddRequest};
@@ -159,9 +159,19 @@ pub fn build_router(state: AppState) -> Router {
         // pins a MAC to a boot entry; /boot.ipxe?mac=... chains directly.
         .route("/api/hosts", get(api_hosts_list).post(api_hosts_upsert))
         .route("/api/hosts/:mac", delete(api_hosts_remove))
+        // v0.5.0: Wake-on-LAN a bound host. Sends a magic packet to the
+        // limited broadcast + the server's own subnet broadcast.
+        .route("/api/hosts/:mac/wol", post(api_hosts_wol))
         // Rolling "host log" of boot events: what image actually
         // started installing on what MAC/IP, and when. Persisted to disk.
         .route("/api/boot-log", get(api_boot_log))
+        // v0.5.0: notification config (Advanced tab) + a "send test"
+        // probe. GET redacts the SMTP password.
+        .route("/api/notify", get(api_notify_get).put(api_notify_put))
+        .route("/api/notify/test", post(api_notify_test))
+        // v0.5.0: About-tab update check — queries the Gitea releases
+        // API and compares against the running version.
+        .route("/api/updates/check", get(api_updates_check))
         // Phase 5: Prometheus scrape endpoint. Plain text exposition
         // format. No auth — the metrics surface is intentionally
         // boring (counts, no payloads).
@@ -613,11 +623,22 @@ async fn boot_sub(
                             .filter(|m| !m.is_empty());
                         state.boot_log.record(&BootEvent {
                             timestamp: time::OffsetDateTime::now_utc(),
-                            mac: mac_normalized,
+                            mac: mac_normalized.clone(),
                             ip: peer_ip,
                             target_id: entry.id.clone(),
                             target_title: format!("{} — {}", iso.filename, entry.title),
                         });
+                        // v0.5.0: fire-and-forget notification on the
+                        // canonical "a machine is imaging" moment.
+                        let who = mac_normalized
+                            .clone()
+                            .or_else(|| peer_ip.map(|ip| ip.to_string()))
+                            .unwrap_or_else(|| "an unknown client".into());
+                        spawn_notify(
+                            &state,
+                            "PXE boot started",
+                            &format!("{who} started booting {} ({}).", iso.filename, entry.title),
+                        );
                         return text_plain(render_entry(entry, &settings, base));
                     }
                 }
@@ -1247,10 +1268,25 @@ async fn api_docs() -> Json<serde_json::Value> {
                      "summary": "Pin a MAC to a boot target. Body: { mac, target, label }."},
                     {"method": "DELETE", "path": "/api/hosts/:mac",
                      "summary": "Remove a binding."},
+                    {"method": "POST", "path": "/api/hosts/:mac/wol",
+                     "summary": "Send a Wake-on-LAN magic packet to a bound MAC (limited + subnet broadcast)."},
                     {"method": "GET", "path": "/api/boot-log",
                      "summary": "Ring of recent boot events (timestamp, mac, ip, target)."},
                 ],
             },
+            {
+                "name": "Notifications & updates",
+                "endpoints": [
+                    {"method": "GET", "path": "/api/notify",
+                     "summary": "Current notification config (SMTP password redacted)."},
+                    {"method": "PUT", "path": "/api/notify",
+                     "summary": "Replace notification config. Body: { enabled, kind, webhook_url, smtp_* }."},
+                    {"method": "POST", "path": "/api/notify/test",
+                     "summary": "Send a test notification using the saved config."},
+                    {"method": "GET", "path": "/api/updates/check",
+                     "summary": "Compare the running version against the latest Gitea release."},
+                ],
+            },
             {
                 "name": "Operator console",
                 "endpoints": [
@@ -2022,6 +2058,220 @@ async fn api_hosts_remove(
     }
 }
 
+/// v0.5.0: Wake-on-LAN a bound host. Sends a magic packet to the limited
+/// broadcast (255.255.255.255) and the server's own subnet broadcast
+/// (computed from the advertised IP + detected mask), which covers the
+/// common "same VLAN as OpenPXE" case with zero network config. We only
+/// wake MACs that are actually bound — keeps this from being an open
+/// "spray packets at any MAC" endpoint.
+async fn api_hosts_wol(
+    State(state): State<AppState>,
+    AxumPath(mac): AxumPath<String>,
+) -> Response {
+    if state.hosts.lookup(&mac).is_none() {
+        return (
+            StatusCode::NOT_FOUND,
+            "no host binding for that MAC — bind it first",
+        )
+            .into_response();
+    }
+
+    // Compute the server's subnet broadcast from the advertised IP +
+    // detected mask so the packet reaches the right VLAN even if the
+    // limited broadcast is filtered. Best-effort: skip if either won't
+    // parse.
+    let server_ip = state
+        .public_base_url
+        .strip_prefix("http://")
+        .unwrap_or(&state.public_base_url)
+        .split(':')
+        .next()
+        .unwrap_or("")
+        .parse::<std::net::Ipv4Addr>();
+    let mask = state.subnet_mask.parse::<std::net::Ipv4Addr>();
+    let mut broadcasts = Vec::new();
+    if let (Ok(ip), Ok(m)) = (server_ip, mask) {
+        broadcasts.push(wol::subnet_broadcast(ip, m));
+    }
+
+    // The send is a blocking std UDP call; push it off the async
+    // executor.
+    let mac_owned = mac.clone();
+    let result =
+        tokio::task::spawn_blocking(move || wol::wake(&mac_owned, &broadcasts)).await;
+    match result {
+        Ok(Ok(n)) => {
+            // Fire-and-forget notification — nice "someone woke a box"
+            // signal, never blocks the response.
+            spawn_notify(
+                &state,
+                "Wake-on-LAN sent",
+                &format!("OpenPXE sent a Wake-on-LAN magic packet to {mac}."),
+            );
+            Json(json!({ "ok": true, "broadcasts": n })).into_response()
+        }
+        Ok(Err(e)) => (StatusCode::BAD_REQUEST, format!("{e}")).into_response(),
+        Err(e) => (StatusCode::INTERNAL_SERVER_ERROR, format!("wol task failed: {e}")).into_response(),
+    }
+}
+
+// ─── Notifications (v0.5.0) ───────────────────────────────────────────────
+
+async fn api_notify_get(State(state): State<AppState>) -> Json<NotifyConfig> {
+    // Redact the SMTP password before it leaves the process.
+    Json(state.notify.snapshot().redacted())
+}
+
+async fn api_notify_put(
+    State(state): State<AppState>,
+    Json(cfg): Json<NotifyConfig>,
+) -> Response {
+    match state.notify.replace(cfg) {
+        Ok(saved) => (StatusCode::OK, Json(saved.redacted())).into_response(),
+        Err(e) => (StatusCode::BAD_REQUEST, format!("{e}")).into_response(),
+    }
+}
+
+/// Send a test notification using the *currently saved* config (not the
+/// request body) so the operator validates exactly what's persisted.
+async fn api_notify_test(State(state): State<AppState>) -> Response {
+    let cfg = state.notify.snapshot();
+    match crate::notify::send(
+        &cfg,
+        "OpenPXE test notification",
+        "If you're reading this, OpenPXE notifications are wired up correctly. \
+         This is a test from the Advanced settings tab.",
+    )
+    .await
+    {
+        Ok(()) => Json(json!({ "ok": true })).into_response(),
+        Err(e) => (StatusCode::BAD_GATEWAY, e).into_response(),
+    }
+}
+
+// ─── Update check (v0.5.0) ────────────────────────────────────────────────
+
+/// Query the project's Gitea releases API for the latest published tag
+/// and compare it to the running version. This is the only outbound
+/// call OpenPXE makes that isn't operator-initiated data movement, and
+/// it's strictly on-demand (the About tab's "Check for updates" button)
+/// — never a background poll, keeping the air-gapped promise intact.
+async fn api_updates_check() -> Response {
+    let current = env!("CARGO_PKG_VERSION");
+    let Some(api) = gitea_releases_api_url() else {
+        return Json(json!({
+            "current": current,
+            "error": "repository URL not configured at build time",
+        }))
+        .into_response();
+    };
+
+    let client = match reqwest::Client::builder()
+        .timeout(std::time::Duration::from_secs(8))
+        .user_agent(concat!("OpenPXE/", env!("CARGO_PKG_VERSION")))
+        .build()
+    {
+        Ok(c) => c,
+        Err(e) => {
+            return Json(json!({ "current": current, "error": format!("client: {e}") }))
+                .into_response();
+        }
+    };
+
+    match client.get(&api).send().await {
+        Ok(resp) if resp.status().is_success() => {
+            let body: serde_json::Value = resp.json().await.unwrap_or(json!({}));
+            let latest_tag = body
+                .get("tag_name")
+                .and_then(|v| v.as_str())
+                .unwrap_or("")
+                .to_string();
+            let html_url = body
+                .get("html_url")
+                .and_then(|v| v.as_str())
+                .unwrap_or("")
+                .to_string();
+            let update_available = version_is_newer(
+                latest_tag.trim_start_matches('v'),
+                current,
+            );
+            Json(json!({
+                "current": current,
+                "latest": latest_tag,
+                "update_available": update_available,
+                "html_url": html_url,
+            }))
+            .into_response()
+        }
+        Ok(resp) => Json(json!({
+            "current": current,
+            "error": format!("releases API returned HTTP {}", resp.status()),
+        }))
+        .into_response(),
+        Err(e) => Json(json!({
+            "current": current,
+            "error": format!("could not reach the releases API: {e}"),
+        }))
+        .into_response(),
+    }
+}
+
+/// Derive the Gitea `releases/latest` API URL from the compile-time
+/// repository URL (`https://host/owner/repo`).
+fn gitea_releases_api_url() -> Option<String> {
+    let repo = option_env!("CARGO_PKG_REPOSITORY").unwrap_or("");
+    let rest = repo
+        .strip_prefix("https://")
+        .or_else(|| repo.strip_prefix("http://"))?;
+    let mut parts = rest.trim_end_matches('/').splitn(3, '/');
+    let host = parts.next()?;
+    let owner = parts.next()?;
+    let name = parts.next()?;
+    if host.is_empty() || owner.is_empty() || name.is_empty() {
+        return None;
+    }
+    Some(format!(
+        "https://{host}/api/v1/repos/{owner}/{name}/releases/latest"
+    ))
+}
+
+/// Compare two dotted numeric versions; `true` when `latest` is strictly
+/// newer than `current`. Non-numeric / malformed parts compare as 0, so
+/// a garbage tag never falsely reports an update.
+fn version_is_newer(latest: &str, current: &str) -> bool {
+    fn parts(v: &str) -> Vec<u64> {
+        v.split('.')
+            .map(|p| p.chars().take_while(char::is_ascii_digit).collect::<String>())
+            .map(|s| s.parse::<u64>().unwrap_or(0))
+            .collect()
+    }
+    let (l, c) = (parts(latest), parts(current));
+    for i in 0..l.len().max(c.len()) {
+        let lv = l.get(i).copied().unwrap_or(0);
+        let cv = c.get(i).copied().unwrap_or(0);
+        if lv != cv {
+            return lv > cv;
+        }
+    }
+    false
+}
+
+/// Fire a notification on a detached task. Never blocks the caller and
+/// never surfaces an error — boot/WoL paths must not hinge on a webhook.
+fn spawn_notify(state: &AppState, subject: &str, body: &str) {
+    let cfg = state.notify.snapshot();
+    if !cfg.is_usable() {
+        return;
+    }
+    let subject = subject.to_string();
+    let body = body.to_string();
+    tokio::spawn(async move {
+        if let Err(e) = crate::notify::send(&cfg, &subject, &body).await {
+            tracing::warn!(target: "openpxe::notify", "notification send failed: {e}");
+        }
+    });
+}
+
 // ─── Boot event log ───────────────────────────────────────────────────────
 
 async fn api_boot_log(State(state): State<AppState>) -> Json<serde_json::Value> {
@@ -2081,6 +2331,28 @@ async fn api_metrics(State(state): State<AppState>) -> Response {
 mod tests {
     use super::*;
 
+    #[test]
+    fn version_newer_detects_updates() {
+        assert!(version_is_newer("0.5.1", "0.5.0"));
+        assert!(version_is_newer("0.6.0", "0.5.9"));
+        assert!(version_is_newer("1.0.0", "0.9.9"));
+        assert!(!version_is_newer("0.5.0", "0.5.0"));
+        assert!(!version_is_newer("0.4.69", "0.5.0"));
+        // A garbage / empty tag must never falsely report an update.
+        assert!(!version_is_newer("", "0.5.0"));
+        assert!(!version_is_newer("not-a-version", "0.5.0"));
+    }
+
+    #[test]
+    fn gitea_api_url_derives_from_repo() {
+        // CARGO_PKG_REPOSITORY is set from the workspace manifest.
+        let url = gitea_releases_api_url();
+        if let Some(u) = url {
+            assert!(u.contains("/api/v1/repos/"), "got: {u}");
+            assert!(u.ends_with("/releases/latest"), "got: {u}");
+        }
+    }
+
     #[test]
     fn range_full() {
         let (s, e, p) = parse_range(None, 1000).unwrap();
diff --git a/crates/http-api/src/auth.rs b/crates/http-api/src/auth.rs
index 8d0ec93..5879b36 100644
--- a/crates/http-api/src/auth.rs
+++ b/crates/http-api/src/auth.rs
@@ -303,12 +303,20 @@ pub async fn api_logout(
 /// * `authenticated: false` — admin exists, no session; show login.
 /// * `authenticated: true` + `user` — let the dashboard load.
 pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMap) -> Response {
+    // v0.5.0: include branding bootstrap so the pre-auth login/setup
+    // screens can render the FleetDM-style full-width custom logo (and
+    // cache-bust it) without an extra round trip. `/api/me` is public,
+    // and the logo asset is public, so this leaks nothing sensitive.
+    let has_custom_logo = state.branding.has_logo();
+    let logo_rev = state.branding.logo_rev();
     if !state.admin.is_configured() {
         return (
             StatusCode::OK,
             Json(json!({
                 "setup_required": true,
                 "authenticated": false,
+                "has_custom_logo": has_custom_logo,
+                "logo_rev": logo_rev,
             })),
         )
             .into_response();
@@ -323,6 +331,8 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
                 "authenticated": true,
                 "user": state.admin.snapshot(),
                 "session_user": u,
+                "has_custom_logo": has_custom_logo,
+                "logo_rev": logo_rev,
             })),
         )
             .into_response(),
@@ -331,6 +341,8 @@ pub async fn api_me(State(state): State<AppState>, headers: axum::http::HeaderMa
             Json(json!({
                 "setup_required": false,
                 "authenticated": false,
+                "has_custom_logo": has_custom_logo,
+                "logo_rev": logo_rev,
             })),
         )
             .into_response(),
diff --git a/crates/http-api/src/lib.rs b/crates/http-api/src/lib.rs
index cae3de8..c3a80c2 100644
--- a/crates/http-api/src/lib.rs
+++ b/crates/http-api/src/lib.rs
@@ -18,6 +18,7 @@ pub mod auth;
 pub mod ipxe_script;
 pub mod iso_fs;
 pub mod log_stream;
+pub mod notify;
 pub mod state;
 pub mod terminal;
 pub mod uploads;
diff --git a/crates/http-api/src/notify.rs b/crates/http-api/src/notify.rs
new file mode 100644
index 0000000..973c1e7
--- /dev/null
+++ b/crates/http-api/src/notify.rs
@@ -0,0 +1,138 @@
+//! Notification *delivery* — the network half of the notify feature.
+//!
+//! `openpxe_core::notify` owns the config + persistence; this module
+//! turns a `NotifyConfig` + a message into an actual delivery:
+//!
+//!   - Slack / Discord / Teams → HTTP POST of a provider-shaped JSON
+//!     body to the operator's incoming-webhook URL (via `reqwest`).
+//!   - SMTP → a TLS email via `lettre`.
+//!
+//! Every send is best-effort and time-bounded: a flaky webhook must
+//! never wedge a PXE boot. Callers fire these from a detached task.
+
+use openpxe_core::{NotifyConfig, NotifyKind};
+use std::time::Duration;
+
+/// Hard ceiling on any single delivery so a hung endpoint can't pin a
+/// task forever.
+const SEND_TIMEOUT: Duration = Duration::from_secs(10);
+
+/// Deliver `body` (with an optional `subject`, used as the email
+/// subject / chat bold-line) using the active provider in `cfg`.
+/// Returns `Ok(())` on success, or a human-readable error suitable for
+/// surfacing in the "Send test" response.
+pub async fn send(cfg: &NotifyConfig, subject: &str, body: &str) -> Result<(), String> {
+    if !cfg.is_usable() {
+        return Err("notifications are not enabled / fully configured".into());
+    }
+    match cfg.kind {
+        NotifyKind::Slack | NotifyKind::Discord | NotifyKind::Teams => {
+            send_webhook(cfg, subject, body).await
+        }
+        NotifyKind::Smtp => send_email(cfg, subject, body).await,
+    }
+}
+
+async fn send_webhook(cfg: &NotifyConfig, subject: &str, body: &str) -> Result<(), String> {
+    // Each chat platform wants a different JSON shape for an incoming
+    // webhook. Keep the bodies minimal and plain-text-ish so they
+    // render cleanly everywhere.
+    let combined = if subject.is_empty() {
+        body.to_string()
+    } else {
+        format!("*{subject}*\n{body}")
+    };
+    let payload = match cfg.kind {
+        NotifyKind::Slack => serde_json::json!({ "text": combined }),
+        NotifyKind::Discord => serde_json::json!({ "content": combined }),
+        NotifyKind::Teams => serde_json::json!({
+            // Legacy MessageCard — the format every Teams "Incoming
+            // Webhook" connector still accepts.
+            "@type": "MessageCard",
+            "@context": "https://schema.org/extensions",
+            "summary": if subject.is_empty() { "OpenPXE" } else { subject },
+            "title": subject,
+            "text": body,
+        }),
+        NotifyKind::Smtp => unreachable!("smtp handled separately"),
+    };
+
+    let client = reqwest::Client::builder()
+        .timeout(SEND_TIMEOUT)
+        .build()
+        .map_err(|e| format!("could not build HTTP client: {e}"))?;
+    let resp = client
+        .post(&cfg.webhook_url)
+        .json(&payload)
+        .send()
+        .await
+        .map_err(|e| format!("webhook POST failed: {e}"))?;
+    let status = resp.status();
+    if status.is_success() {
+        Ok(())
+    } else {
+        let snippet = resp
+            .text()
+            .await
+            .unwrap_or_default()
+            .chars()
+            .take(200)
+            .collect::<String>();
+        Err(format!("webhook returned HTTP {status}: {snippet}"))
+    }
+}
+
+async fn send_email(cfg: &NotifyConfig, subject: &str, body: &str) -> Result<(), String> {
+    use lettre::transport::smtp::authentication::Credentials;
+    use lettre::{AsyncSmtpTransport, AsyncTransport, Message, Tokio1Executor};
+
+    let from = if cfg.smtp_from.trim().is_empty() {
+        cfg.smtp_username.trim()
+    } else {
+        cfg.smtp_from.trim()
+    };
+    if from.is_empty() {
+        return Err("SMTP requires a From address (or a username to fall back to)".into());
+    }
+
+    let email = Message::builder()
+        .from(
+            from.parse()
+                .map_err(|e| format!("invalid From address '{from}': {e}"))?,
+        )
+        .to(cfg
+            .smtp_to
+            .trim()
+            .parse()
+            .map_err(|e| format!("invalid To address '{}': {e}", cfg.smtp_to))?)
+        .subject(if subject.is_empty() { "OpenPXE" } else { subject })
+        .body(body.to_string())
+        .map_err(|e| format!("could not build email: {e}"))?;
+
+    // Implicit TLS (465) vs STARTTLS (587). We never send plaintext.
+    let mut builder = if cfg.smtp_implicit_tls {
+        AsyncSmtpTransport::<Tokio1Executor>::relay(&cfg.smtp_host)
+            .map_err(|e| format!("SMTP relay setup failed: {e}"))?
+    } else {
+        AsyncSmtpTransport::<Tokio1Executor>::starttls_relay(&cfg.smtp_host)
+            .map_err(|e| format!("SMTP STARTTLS setup failed: {e}"))?
+    }
+    .port(cfg.smtp_port)
+    .timeout(Some(SEND_TIMEOUT));
+
+    // Auth is optional — some internal relays accept unauthenticated
+    // mail from trusted hosts. Only attach credentials when a username
+    // is set.
+    if !cfg.smtp_username.trim().is_empty() {
+        builder = builder.credentials(Credentials::new(
+            cfg.smtp_username.trim().to_string(),
+            cfg.smtp_password.clone(),
+        ));
+    }
+    let mailer = builder.build();
+    mailer
+        .send(email)
+        .await
+        .map(|_| ())
+        .map_err(|e| format!("SMTP send failed: {e}"))
+}
diff --git a/crates/http-api/src/state.rs b/crates/http-api/src/state.rs
index 46a92fe..b61e327 100644
--- a/crates/http-api/src/state.rs
+++ b/crates/http-api/src/state.rs
@@ -2,7 +2,7 @@ use crate::uploads::UploadSessions;
 use crate::auth::SessionStore;
 use openpxe_core::{
     AdminStore, BootLog, BrandingStore, ClientRegistry, DeploymentQueue, HostBindings, LogBus,
-    Metrics, SettingsStore, SsoStore,
+    Metrics, NotifyStore, SettingsStore, SsoStore,
 };
 use openpxe_iso_store::{IsoStore, NfsShareManager, SmbManager, SmbShareManager};
 use std::sync::Arc;
@@ -37,6 +37,10 @@ pub struct AppState {
     /// SAML SSO configuration. v0.4.5 stores it; the actual SSO login
     /// flow ships in a later release.
     pub sso: SsoStore,
+    /// v0.5.0: webhook / email notification config (Slack/Teams/Discord/
+    /// SMTP). Drives the fire-and-forget pings on boot events and powers
+    /// the Advanced tab's config + "Send test" button.
+    pub notify: NotifyStore,
     /// Lock-free metrics counters surfaced at `/metrics` in Prometheus
     /// text format. Cheap to clone (handles to atomics).
     pub metrics: Metrics,
diff --git a/crates/http-api/tests/full_flow.rs b/crates/http-api/tests/full_flow.rs
index 6c17434..6a1c9fa 100644
--- a/crates/http-api/tests/full_flow.rs
+++ b/crates/http-api/tests/full_flow.rs
@@ -102,6 +102,7 @@ async fn build_state() -> (AppState, tempfile::TempDir) {
     let branding = openpxe_core::BrandingStore::load_or_default(dir.path());
     let admin = openpxe_core::AdminStore::load_or_default(dir.path());
     let sso = openpxe_core::SsoStore::load_or_default(dir.path());
+    let notify = openpxe_core::NotifyStore::load_or_default(dir.path());
     let sessions = openpxe_http_api::auth::SessionStore::default();
     let metrics = Metrics::new();
     let state = AppState {
@@ -115,6 +116,7 @@ async fn build_state() -> (AppState, tempfile::TempDir) {
         admin,
         sessions,
         sso,
+        notify,
         metrics,
         smb: None,
         smb_shares,
@@ -535,6 +537,54 @@ async fn smb_shares_list_starts_empty() {
 
 // v0.4.67: NFSv3 share manager (parallel to SMB).
 
+// ── v0.5.0: notifications + Wake-on-LAN ────────────────────────────────────
+
+#[tokio::test]
+async fn notify_config_round_trips_and_redacts_smtp_password() {
+    let (state, _dir) = build_state().await;
+    let app = build_router(state);
+    // Save an SMTP config with a password.
+    let (s, _b) = put_json(
+        &app,
+        "/api/notify",
+        r#"{"enabled":true,"kind":"smtp","smtp_host":"smtp.example.com","smtp_port":587,"smtp_to":"ops@example.com","smtp_from":"openpxe@example.com","smtp_password":"s3cret"}"#,
+    )
+    .await;
+    assert_eq!(s, StatusCode::OK);
+    // GET must redact the password (never echo the real secret).
+    let (s, b) = get(&app, "/api/notify").await;
+    assert_eq!(s, StatusCode::OK);
+    let v: serde_json::Value = serde_json::from_slice(&b).unwrap();
+    assert_eq!(v["enabled"], true);
+    assert_eq!(v["kind"], "smtp");
+    let pw = v["smtp_password"].as_str().unwrap_or("");
+    assert_ne!(pw, "s3cret", "raw password must never be returned");
+    assert!(!pw.is_empty(), "a set password should surface as a sentinel");
+}
+
+#[tokio::test]
+async fn notify_enable_webhook_without_url_is_rejected() {
+    let (state, _dir) = build_state().await;
+    let app = build_router(state);
+    let (s, _b) = put_json(
+        &app,
+        "/api/notify",
+        r#"{"enabled":true,"kind":"slack","webhook_url":""}"#,
+    )
+    .await;
+    assert_eq!(s, StatusCode::BAD_REQUEST);
+}
+
+#[tokio::test]
+async fn wol_on_unbound_mac_is_404() {
+    // WoL only fires for bound MACs — an arbitrary MAC must 404 so the
+    // endpoint isn't an open packet sprayer.
+    let (state, _dir) = build_state().await;
+    let app = build_router(state);
+    let (s, _b) = post_json(&app, "/api/hosts/aa:bb:cc:dd:ee:ff/wol", "{}").await;
+    assert_eq!(s, StatusCode::NOT_FOUND);
+}
+
 #[tokio::test]
 async fn nfs_shares_list_starts_empty() {
     let (state, _dir) = build_state().await;
diff --git a/crates/openpxe/src/main.rs b/crates/openpxe/src/main.rs
index 892bff9..76c3df5 100644
--- a/crates/openpxe/src/main.rs
+++ b/crates/openpxe/src/main.rs
@@ -107,6 +107,7 @@ async fn main() -> anyhow::Result<()> {
     let branding = openpxe_core::BrandingStore::load_or_default(&config.paths.work_dir);
     let admin = openpxe_core::AdminStore::load_or_default(&config.paths.work_dir);
     let sso = openpxe_core::SsoStore::load_or_default(&config.paths.work_dir);
+    let notify = openpxe_core::NotifyStore::load_or_default(&config.paths.work_dir);
     let sessions = openpxe_http_api::auth::SessionStore::default();
     let metrics = Metrics::new();
 
@@ -167,6 +168,7 @@ async fn main() -> anyhow::Result<()> {
         admin: admin.clone(),
         sessions: sessions.clone(),
         sso: sso.clone(),
+        notify: notify.clone(),
         metrics: metrics.clone(),
         smb: Some(smb.clone()),
         smb_shares: smb_shares.clone(),
diff --git a/crates/webui/src/app.css b/crates/webui/src/app.css
index 1e04576..a5294e2 100644
--- a/crates/webui/src/app.css
+++ b/crates/webui/src/app.css
@@ -627,6 +627,14 @@ tr.unbootable td:first-child { border-left: 3px solid var(--warn); }
 }
 .auth-card .brand-row img { width: 32px; height: 32px; flex: none; }
 .auth-card .brand-row .name { font-size: 17px; font-weight: 600; letter-spacing: 0.2px; color: var(--fg); }
+/* v0.5.0: FleetDM-style custom logo on the login/setup card — the
+   uploaded logo spans the card header and the "OpenPXE" wordmark is
+   dropped (the logo is the brand). Matches the sidebar treatment. */
+.auth-card .brand-row.has-custom-logo { justify-content: center; gap: 0; margin-bottom: 22px; }
+.auth-card .brand-row.has-custom-logo img {
+  width: auto; height: 52px; max-width: 240px;
+  object-fit: contain; object-position: center;
+}
 .auth-card h2 {
   margin: 0 0 6px; font-size: 16px; font-weight: 600; color: var(--fg);
 }
diff --git a/crates/webui/src/app.js b/crates/webui/src/app.js
index bb3132a..b83cbe1 100644
--- a/crates/webui/src/app.js
+++ b/crates/webui/src/app.js
@@ -973,18 +973,37 @@
         }
       }}, 'Bind MAC to target');
 
-      const rows = hosts.map(h => el('tr', {}, [
-        el('td', {class:'mono'}, h.mac),
-        el('td', {}, h.label || el('span', {class:'tag'}, '(unlabeled)')),
-        el('td', {class:'mono'}, h.target),
-        el('td', {}, fmtAgo(h.updated_at)),
-        el('td', {style:'text-align:right'},
-          el('button', {class:'danger', onclick: async () => {
-            if (!confirm('Remove binding for ' + h.mac + '?')) return;
-            await fetch('/api/hosts/' + encodeURIComponent(h.mac), {method:'DELETE'});
-            render('hosts');
-          }}, 'Remove')),
-      ]));
+      const rows = hosts.map(h => {
+        // v0.5.0: Wake-on-LAN. Only shown for bound hosts (this whole
+        // table is bound hosts). The button reports its own state inline
+        // so there's no shared toast to thread through.
+        const wakeBtn = el('button', {class:'ghost', onclick: async () => {
+          wakeBtn.disabled = true;
+          const original = wakeBtn.textContent;
+          wakeBtn.textContent = 'Waking…';
+          try {
+            const r = await postJSON('/api/hosts/' + encodeURIComponent(h.mac) + '/wol', {});
+            wakeBtn.textContent = r.ok ? 'Sent ✓' : 'Failed';
+          } catch (e) {
+            wakeBtn.textContent = 'Failed';
+          }
+          setTimeout(() => { wakeBtn.textContent = original; wakeBtn.disabled = false; }, 2500);
+        }}, 'Wake');
+        return el('tr', {}, [
+          el('td', {class:'mono'}, h.mac),
+          el('td', {}, h.label || el('span', {class:'tag'}, '(unlabeled)')),
+          el('td', {class:'mono'}, h.target),
+          el('td', {}, fmtAgo(h.updated_at)),
+          el('td', {style:'text-align:right;white-space:nowrap'}, [
+            wakeBtn,
+            el('button', {class:'danger', style:'margin-left:8px', onclick: async () => {
+              if (!confirm('Remove binding for ' + h.mac + '?')) return;
+              await fetch('/api/hosts/' + encodeURIComponent(h.mac), {method:'DELETE'});
+              render('hosts');
+            }}, 'Remove'),
+          ]),
+        ]);
+      });
 
       const table = hosts.length
         ? el('table', {}, [
@@ -1185,9 +1204,8 @@
     },
 
     settings: async () => {
-      const [status, docs, me, sso] = await Promise.all([
+      const [status, me, sso] = await Promise.all([
         getJSON('/api/status'),
-        getJSON('/api/docs').catch(() => ({ groups: [] })),
         getJSON('/api/me').catch(() => ({})),
         getJSON('/api/sso').catch(() => ({
           enabled:false, idp_name:'', metadata:'', metadata_url:'',
@@ -1489,10 +1507,133 @@
         ]),
       ]);
 
-      // ── API reference (always at the bottom of Settings).
-      // Sourced from /api/docs so the hand-curated list stays the
-      // single source of truth and the UI doesn't need its own copy
-      // baked into the JS bundle.
+      // v0.5.0: the API reference moved to the Advanced tab; Settings
+      // now holds just account / SSO / branding.
+      return el('div', {class:'grid'}, [accountCard, ssoCard, logoCard]);
+    },
+
+    // v0.5.0: Advanced settings — webhook/email notifications, and the
+    // API reference (relocated from the bottom of Settings).
+    advanced: async () => {
+      const [notify, docs] = await Promise.all([
+        getJSON('/api/notify').catch(() => ({ enabled:false, kind:'slack' })),
+        getJSON('/api/docs').catch(() => ({ groups: [] })),
+      ]);
+
+      // ── Notification config ──
+      const nMsg = el('div', {class:'msg', style:'margin-top:12px'});
+      const nEnabled = el('input', {type:'checkbox'}); nEnabled.checked = !!notify.enabled;
+      const nKind = el('select', {}, [
+        el('option', {value:'slack'}, 'Slack'),
+        el('option', {value:'discord'}, 'Discord'),
+        el('option', {value:'teams'}, 'Microsoft Teams'),
+        el('option', {value:'smtp'}, 'Email (SMTP)'),
+      ]);
+      nKind.value = notify.kind || 'slack';
+      const nWebhook = el('input', {type:'text', placeholder:'https://hooks.slack.com/services/…',
+        value: notify.webhook_url || ''});
+      // SMTP fields.
+      const sHost = el('input', {type:'text', placeholder:'smtp.example.com', value: notify.smtp_host || ''});
+      const sPort = el('input', {type:'number', value: String(notify.smtp_port || 587)});
+      const sUser = el('input', {type:'text', placeholder:'(optional)', value: notify.smtp_username || ''});
+      // GET returns the password as a redaction sentinel when one is
+      // set; show an empty field with an "(unchanged)" placeholder and
+      // let collectNotify() re-send the sentinel so the stored secret
+      // is preserved unless the operator types a new one.
+      const hasStoredPass = !!notify.smtp_password;
+      const sPass = el('input', {type:'password',
+        placeholder: hasStoredPass ? '•••••• (unchanged)' : '', value: ''});
+      const sFrom = el('input', {type:'text', placeholder:'openpxe@example.com', value: notify.smtp_from || ''});
+      const sTo   = el('input', {type:'text', placeholder:'ops@example.com', value: notify.smtp_to || ''});
+      const sTls  = el('input', {type:'checkbox'}); sTls.checked = !!notify.smtp_implicit_tls;
+
+      const webhookBlock = el('div', {class:'form-row'}, [
+        el('label', {class:'field', style:'grid-column:1 / -1'}, [
+          el('span', {class:'name'}, 'Incoming webhook URL'),
+          nWebhook,
+          el('span', {class:'hint'},
+            'Slack/Discord/Teams all use an "incoming webhook" URL you create in that app.'),
+        ]),
+      ]);
+      const smtpBlock = el('div', {}, [
+        el('div', {class:'form-row cols-2'}, [
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'SMTP host'), sHost]),
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'Port'), sPort]),
+        ]),
+        el('div', {class:'form-row cols-2', style:'margin-top:12px'}, [
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'Username (optional)'), sUser]),
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'Password'), sPass]),
+        ]),
+        el('div', {class:'form-row cols-2', style:'margin-top:12px'}, [
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'From'), sFrom]),
+          el('label', {class:'field'}, [el('span', {class:'name'}, 'To'), sTo]),
+        ]),
+        el('label', {class:'check', style:'margin-top:12px'}, [
+          sTls, el('span', {}, 'Implicit TLS (port 465). Leave off for STARTTLS (587).'),
+        ]),
+      ]);
+      // Toggle which provider block shows.
+      const syncKind = () => {
+        const smtp = nKind.value === 'smtp';
+        webhookBlock.style.display = smtp ? 'none' : '';
+        smtpBlock.style.display = smtp ? '' : 'none';
+      };
+      nKind.addEventListener('change', syncKind);
+      syncKind();
+
+      const collectNotify = () => ({
+        enabled: nEnabled.checked,
+        kind: nKind.value,
+        webhook_url: nWebhook.value,
+        smtp_host: sHost.value,
+        smtp_port: Number(sPort.value) || 587,
+        smtp_username: sUser.value,
+        // Empty field + a stored password → send the sentinel so the
+        // server keeps it. Otherwise send whatever was typed (a new
+        // password, or empty to clear when none was stored).
+        smtp_password: (sPass.value === '' && hasStoredPass) ? '__keep__' : sPass.value,
+        smtp_from: sFrom.value,
+        smtp_to: sTo.value,
+        smtp_implicit_tls: sTls.checked,
+      });
+
+      const saveBtn = el('button', {style:'margin-top:16px', onclick: async () => {
+        nMsg.textContent = 'Saving…'; nMsg.className = 'msg';
+        const r = await putJSON('/api/notify', collectNotify());
+        if (r.ok) { nMsg.textContent = 'Saved.'; nMsg.className = 'msg ok'; render('advanced'); }
+        else { nMsg.textContent = 'Save failed: ' + (await r.text()); nMsg.className = 'msg err'; }
+      }}, 'Save notification settings');
+      const testBtn = el('button', {class:'ghost', style:'margin-top:16px;margin-left:8px',
+        onclick: async () => {
+          nMsg.textContent = 'Sending test…'; nMsg.className = 'msg';
+          // Save first so the test uses exactly what's on screen.
+          const rs = await putJSON('/api/notify', collectNotify());
+          if (!rs.ok) { nMsg.textContent = 'Save failed: ' + (await rs.text()); nMsg.className = 'msg err'; return; }
+          const r = await postJSON('/api/notify/test', {});
+          if (r.ok) { nMsg.textContent = 'Test notification sent — check your channel/inbox.'; nMsg.className = 'msg ok'; }
+          else { nMsg.textContent = 'Test failed: ' + (await r.text()); nMsg.className = 'msg err'; }
+        }}, 'Send test');
+
+      const notifyCard = el('div', {class:'card'}, [
+        el('header', {}, [
+          el('h2', {}, 'Webhook notifications'),
+          el('span', {class:'sub'}, notify.enabled ? 'enabled' : 'disabled'),
+        ]),
+        el('div', {class:'body'}, [
+          el('p', {class:'msg', style:'margin-bottom:14px'},
+            'Get pinged when a machine PXE-boots an image, a deployment is assigned, ' +
+            'or a host is woken. One provider at a time — pick yours, paste the URL ' +
+            '(or SMTP details), and Send test.'),
+          el('div', {class:'form-row cols-2'}, [
+            el('label', {class:'check'}, [nEnabled, el('span', {}, 'Enable notifications')]),
+            el('label', {class:'field'}, [el('span', {class:'name'}, 'Provider'), nKind]),
+          ]),
+          el('div', {style:'margin-top:14px'}, [webhookBlock, smtpBlock]),
+          saveBtn, testBtn, nMsg,
+        ]),
+      ]);
+
+      // ── API reference (relocated from Settings) ──
       const groups = docs.groups || [];
       const apiCard = el('div', {class:'card'}, [
         el('header', {}, [
@@ -1515,12 +1656,41 @@
                 'No API documentation returned by /api/docs.')),
       ]);
 
-      return el('div', {class:'grid'}, [accountCard, ssoCard, logoCard, apiCard]);
+      return el('div', {class:'grid'}, [notifyCard, apiCard]);
     },
 
     about: async () => {
       const status = await getJSON('/api/status');
-      return el('div', {class:'card'}, [
+
+      // ── Check for updates ──
+      const updMsg = el('div', {class:'msg', style:'margin-top:10px'});
+      const updBtn = el('button', {onclick: async () => {
+        updMsg.textContent = 'Checking the OpenPXE release feed…'; updMsg.className = 'msg';
+        try {
+          const r = await getJSON('/api/updates/check');
+          if (r.error) {
+            updMsg.replaceChildren(document.createTextNode('Couldn’t check: ' + r.error));
+            updMsg.className = 'msg err';
+          } else if (r.update_available) {
+            const parts = [document.createTextNode('Update available: '),
+              el('strong', {}, r.latest), document.createTextNode(' (you’re on ' + r.current + '). ')];
+            if (r.html_url) {
+              parts.push(el('a', {href:r.html_url, target:'_blank', rel:'noopener noreferrer'},
+                'View release →'));
+            }
+            updMsg.replaceChildren(...parts);
+            updMsg.className = 'msg ok';
+          } else {
+            updMsg.replaceChildren(document.createTextNode(
+              'You’re up to date — running the latest release (' + r.current + ').'));
+            updMsg.className = 'msg ok';
+          }
+        } catch (e) {
+          updMsg.textContent = 'Couldn’t reach the release feed (offline?).'; updMsg.className = 'msg err';
+        }
+      }}, 'Check for updates');
+
+      const heroCard = el('div', {class:'card'}, [
         el('div', {class:'about-hero'}, [
           el('h2', {}, 'OpenPXE'),
           el('p', {class:'lead'},
@@ -1535,6 +1705,7 @@
             el('a', {href:'https://openpxe.com/', target:'_blank', rel:'noopener noreferrer'},
               'https://openpxe.com/'),
           ]),
+          el('div', {style:'margin-top:18px'}, [updBtn, updMsg]),
           el('p', {class:'msg', style:'margin-top:18px'},
             'iPXE is an internal implementation detail. Everything the firmware ' +
             'executes is generated from the settings on these tabs — there is no ' +
@@ -1547,6 +1718,46 @@
             'flip "testsigning" on a target machine.'),
         ]),
       ]);
+
+      // ── Licenses ──
+      const licenseCard = el('div', {class:'card'}, [
+        el('header', {}, el('h2', {}, 'License')),
+        el('div', {class:'body'}, [
+          el('p', {class:'msg', style:'margin-bottom:12px'}, [
+            'OpenPXE is dual-licensed under ',
+            el('strong', {}, 'MIT'), document.createTextNode(' OR '),
+            el('strong', {}, 'Apache License 2.0'),
+            document.createTextNode(
+              ' — use it under whichever fits your organization (SPDX: MIT OR Apache-2.0).'),
+          ]),
+          el('div', {class:'license-grid', style:'display:grid;grid-template-columns:1fr 1fr;gap:14px'}, [
+            el('div', {}, [
+              el('h3', {style:'margin:0 0 6px'}, 'MIT License'),
+              el('p', {class:'msg', style:'font-size:12px'},
+                'Permission is hereby granted, free of charge, to any person obtaining a copy ' +
+                'of this software and associated documentation files, to deal in the Software ' +
+                'without restriction… THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.'),
+              el('a', {href:'https://opensource.org/license/mit', target:'_blank', rel:'noopener noreferrer'},
+                'Full MIT text →'),
+            ]),
+            el('div', {}, [
+              el('h3', {style:'margin:0 0 6px'}, 'Apache License 2.0'),
+              el('p', {class:'msg', style:'font-size:12px'},
+                'Licensed under the Apache License, Version 2.0. Includes an express grant of ' +
+                'patent rights from contributors. Distributed on an "AS IS" BASIS, WITHOUT ' +
+                'WARRANTIES OR CONDITIONS OF ANY KIND.'),
+              el('a', {href:'https://www.apache.org/licenses/LICENSE-2.0', target:'_blank', rel:'noopener noreferrer'},
+                'Full Apache 2.0 text →'),
+            ]),
+          ]),
+          el('p', {class:'msg', style:'margin-top:14px;font-size:12px;opacity:.8'},
+            'Bundled components keep their own licenses: iPXE (GPLv2 / UBDL), Samba smbclient, ' +
+            'wimtools, and the Rust crates in this build. See the source repository for the ' +
+            'complete NOTICE.'),
+        ]),
+      ]);
+
+      return el('div', {class:'grid'}, [heroCard, licenseCard]);
     },
   };
 
@@ -1559,6 +1770,7 @@
     hosts: 'Hosts',
     terminal: 'Terminal',
     settings: 'Settings',
+    advanced: 'Advanced',
     about: 'About',
   };
 
@@ -1663,6 +1875,26 @@
   let chipsInterval = null;
   let authScreenEl = null;
   let ssoConfig = null;
+  // v0.5.0: branding bootstrap for the pre-auth screens, populated from
+  // /api/me (public). Lets the login/setup cards render the same
+  // FleetDM-style full-width custom logo the dashboard sidebar uses.
+  let brandInfo = { has_custom_logo: false, logo_rev: 0 };
+
+  // Brand row for the auth screens. With a custom logo uploaded: the
+  // logo spans the card, no "OpenPXE" wordmark (the logo is the brand).
+  // Default: bundled mark + "OpenPXE".
+  function authBrandRow() {
+    const src = '/assets/logo.svg?r=' + (brandInfo.logo_rev || 0);
+    if (brandInfo.has_custom_logo) {
+      return el('div', {class:'brand-row has-custom-logo'}, [
+        el('img', {src, alt:'logo'}),
+      ]);
+    }
+    return el('div', {class:'brand-row'}, [
+      el('img', {src, alt:''}),
+      el('div', {class:'name'}, 'OpenPXE'),
+    ]);
+  }
 
   function teardownAuthScreen() {
     if (authScreenEl && authScreenEl.parentNode) {
@@ -1719,10 +1951,7 @@
         submit.textContent = 'Sign in';
       }
     }}, [
-      el('div', {class:'brand-row'}, [
-        el('img', {src:'/assets/logo.svg', alt:''}),
-        el('div', {class:'name'}, 'OpenPXE'),
-      ]),
+      authBrandRow(),
       el('h2', {}, 'Sign in'),
       el('p', {class:'lede'}, 'Enter your administrator credentials. Forgot them? SSH to the host and remove work_dir/auth.json — the next launch will re-prompt for setup.'),
       el('label', {class:'field'}, [
@@ -1787,10 +2016,7 @@
         submit.textContent = 'Create administrator';
       }
     }}, [
-      el('div', {class:'brand-row'}, [
-        el('img', {src:'/assets/logo.svg', alt:''}),
-        el('div', {class:'name'}, 'OpenPXE'),
-      ]),
+      authBrandRow(),
       el('h2', {}, 'First-run setup'),
       el('p', {class:'lede'}, 'Welcome. Create the administrator account that will own this OpenPXE deployment. Additional users come in through SSO later.'),
       el('label', {class:'field'}, [
@@ -1906,15 +2132,17 @@
     let me;
     try {
       me = await fetch('/api/me').then(r => r.json());
+      // Capture branding so the auth cards render the custom logo.
+      brandInfo = {
+        has_custom_logo: !!me.has_custom_logo,
+        logo_rev: me.logo_rev || 0,
+      };
     } catch (e) {
       // /api/me is unauthenticated in every state — if we can't reach
       // it the server is genuinely down, not an auth problem.
       document.body.appendChild(el('div', {class:'auth-screen'},
         el('div', {class:'auth-card'}, [
-          el('div', {class:'brand-row'}, [
-            el('img', {src:'/assets/logo.svg', alt:''}),
-            el('div', {class:'name'}, 'OpenPXE'),
-          ]),
+          authBrandRow(),
           el('h2', {}, 'Connection error'),
           el('p', {class:'lede'}, 'Could not reach the OpenPXE server. Refresh once it is back up.'),
         ])));
diff --git a/crates/webui/src/index.html b/crates/webui/src/index.html
index 6b91256..6fa32b9 100644
--- a/crates/webui/src/index.html
+++ b/crates/webui/src/index.html
@@ -53,6 +53,7 @@
       </a>
       <a data-view="terminal">Terminal</a>
       <a data-view="settings">Settings</a>
+      <a data-view="advanced">Advanced</a>
       <a data-view="about">About</a>
     </nav>
     <div class="footer">