feat(mobile): per-user device bindings, multi-user Inbox routing, and admin-mediated authorization

- Device→user bindings persisted in config table (auth.rs), loaded at plugin start
- RelayApp now routes Inbox responses per-user via UserChannelApi, never globally
- New mobile_bind_device LLM tool for admin-mediated device→user assignment
- Per-user event forwarders (events.rs) with per-user debounced notifiers
- Config listener (auth::config_listener) refreshes bindings cache reactively
- Reconcile loop catches users who unlock after boot
- Hello/Logout treated as device-registry ops (no user resolution needed)
- Unbound device payloads are silently dropped
- RelayAgent::authorize_client → bind_device (atomic bind + authorize)
- Approval rules seed mobile_bind_device/revoke_device as require

Cargo.lock

@@ -432,6 +432,12 @@ version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
 [[package]]
 name = "bytes"
 version = "1.11.1"
@@ -2563,6 +2569,19 @@ dependencies = [
  "icu_properties",
 ]
 
+[[package]]
+name = "image"
+version = "0.25.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85ab80394333c02fe689eaf900ab500fbd0c2213da414687ebf995a65d5a6104"
+dependencies = [
+ "bytemuck",
+ "byteorder-lite",
+ "moxcms",
+ "num-traits",
+ "png 0.18.1",
+]
+
 [[package]]
 name = "include_dir"
 version = "0.7.4"
@@ -3162,6 +3181,16 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "moxcms"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb85c154ba489f01b25c0d36ae69a87e4a1c73a72631fc6c0eb6dde34a73e44b"
+dependencies = [
+ "num-traits",
+ "pxfm",
+]
+
 [[package]]
 name = "muda"
 version = "0.19.3"
@@ -3986,6 +4015,28 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "plugin-mobile-connector"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "axum",
+ "chrono",
+ "core-api",
+ "hex",
+ "image",
+ "qrcode",
+ "rand 0.9.4",
+ "serde",
+ "serde_json",
+ "skald-relay-client",
+ "skald-relay-common",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
 [[package]]
 name = "plugin-tailscale-remote"
 version = "0.1.0"
@@ -4392,6 +4443,21 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "pxfm"
+version = "0.1.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d55d956fa96f5ec02be2e13af0e20391a5aa83d6a074e3ad368959d0fab299ea"
+
+[[package]]
+name = "qrcode"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d68782463e408eb1e668cf6152704bd856c78c5b6417adaee3203d8f4c1fc9ec"
+dependencies = [
+ "image",
+]
+
 [[package]]
 name = "quick-xml"
 version = "0.41.0"
@@ -5407,6 +5473,7 @@ dependencies = [
  "notify",
  "plugin-comfyui",
  "plugin-elevenlabs",
+ "plugin-mobile-connector",
  "plugin-tailscale-remote",
  "plugin-telegram-bot",
  "plugin-transcribe-whisper-local",