Add scrobbling support (Last.fm + ListenBrainz) and rsp settings reload

- Full Last.fm API implementation with MD5 signing (track.updateNowPlaying, track.scrobble)
- Full ListenBrainz API implementation (/1/submit-listens for playing_now and single)
- ScrobbleState in daemon tracking track, start time, and unix timestamp per play
- Scrobble threshold: ≥30s play AND (≥half duration OR ≥4 min)
- Duration extraction from symphonia codec params into AudioMetadata and Track
- Token validation at daemon startup and on config change
- ListenBrainz token valid (user: Salmonium) command to re-read config from disk (avoids token in shell history)
- Desktop notifications for token validation results
- Empty-credential filtering (empty string = no-op)

1 files changed, 88 insertions, 1 deletions

diff --git a/Cargo.lock b/Cargo.lock
index d4a7870..923e985 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -279,6 +279,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4512299f36f043ab09a583e57bceb5a5aab7a73db1805848e8fef3c9e8c78b3"
 
 [[package]]
+name = "block-buffer"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdd35008169921d80bc60d3d0ab416eecb028c4cd653352907921d95084790be"
+dependencies = [
+ "hybrid-array",
+]
+
+[[package]]
 name = "block2"
 version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -456,6 +465,12 @@ dependencies = [
 ]
 
 [[package]]
+name = "const-oid"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
+
+[[package]]
 name = "core-foundation"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -541,6 +556,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
 
 [[package]]
+name = "crypto-common"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77727bb15fa921304124b128af125e7e3b968275d1b108b379190264f4423710"
+dependencies = [
+ "hybrid-array",
+]
+
+[[package]]
 name = "ctrlc"
 version = "3.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -567,6 +591,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "digest"
+version = "0.11.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1dd6dbb5841937940781866fa1281a1ff7bd3bf827091440879f9994983d5c2"
+dependencies = [
+ "block-buffer",
+ "const-oid",
+ "crypto-common",
+]
+
+[[package]]
 name = "directories"
 version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -768,6 +803,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07bbe89c50d7a535e539b8c17bc0b49bdb77747034daa8087407d655f3f7cc1d"
 dependencies = [
  "futures-core",
+ "futures-sink",
 ]
 
 [[package]]
@@ -814,7 +850,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
 dependencies = [
  "futures-core",
+ "futures-io",
+ "futures-sink",
  "futures-task",
+ "memchr",
  "pin-project-lite",
  "slab",
 ]
@@ -970,6 +1009,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6dbf3de79e51f3d586ab4cb9d5c3e2c14aa28ed23d180cf89b4df0454a69cc87"
 
 [[package]]
+name = "hybrid-array"
+version = "0.4.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9155a582abd142abc056962c29e3ce5ff2ad5469f4246b537ed42c5deba857da"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
 name = "hyper"
 version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1382,6 +1430,16 @@ dependencies = [
 ]
 
 [[package]]
+name = "md-5"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69b6441f590336821bb897fb28fc622898ccceb1d6cea3fde5ea86b090c4de98"
+dependencies = [
+ "cfg-if",
+ "digest",
+]
+
+[[package]]
 name = "memchr"
 version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1924,7 +1982,9 @@ dependencies = [
  "base64",
  "bytes",
  "encoding_rs",
+ "futures-channel",
  "futures-core",
+ "futures-util",
  "h2",
  "http",
  "http-body",
@@ -1943,6 +2003,7 @@ dependencies = [
  "rustls-platform-verifier",
  "serde",
  "serde_json",
+ "serde_urlencoded",
  "sync_wrapper",
  "tokio",
  "tokio-rustls",
@@ -1971,7 +2032,7 @@ dependencies = [
 
 [[package]]
 name = "rsp"
-version = "0.5.0"
+version = "0.8.0"
 dependencies = [
  "chrono",
  "clap",
@@ -1980,7 +2041,9 @@ dependencies = [
  "ctrlc",
  "directories",
  "dirs",
+ "hex",
  "libc",
+ "md-5",
  "notify-rust",
  "rand 0.10.1",
  "reqwest",
@@ -2129,6 +2192,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
 
 [[package]]
+name = "ryu"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9774ba4a74de5f7b1c1451ed6cd5285a32eddb5cccb8cc655a4e50009e06477f"
+
+[[package]]
 name = "same-file"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2245,6 +2314,18 @@ dependencies = [
 ]
 
 [[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
 name = "shlex"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2879,6 +2960,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
 [[package]]
+name = "typenum"
+version = "1.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40ce102ab67701b8526c123c1bab5cbe42d7040ccfd0f64af1a385808d2f43de"
+
+[[package]]
 name = "uds_windows"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"