feat: hsmc statechart rewrite with wake/run/shutdown animations

- Pull the entire device lifecycle into a single hsmc 0.5.1 statechart;
  remove JIGGLE_FLAG, the Phase enum, the imperative main loop, and the
  separate led_task.
- Add wake-up (horizontal shake), running (3 fast circles), and
  pre-shutdown (inward spiral) mouse animations as during: activities.
- Tighten reset → wake-shake latency from ~2s to ~240ms; HID poll_ms
  60 → 8 so the host actually samples animation frames.
- Set RUN_DURATION = 3h50m, the math-optimum under the user's workday
  distribution for "screen sleeps during lunch on most days."

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -716,6 +716,30 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "hsmc"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "497ed9593e4baf6ef120b24aff80cb898f6832d32cdf01be9d90be0c06624e77"
+dependencies = [
+ "embassy-futures",
+ "embassy-sync",
+ "embassy-time",
+ "heapless 0.8.0",
+ "hsmc-macros",
+]
+
+[[package]]
+name = "hsmc-macros"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49d0b1413ed69ba168f9d0edbf4a8ea21569eaf352edf4e11335ae3d765ba004"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"
@@ -748,11 +772,16 @@ dependencies = [
  "cortex-m",
  "cortex-m-rt",
  "embassy-executor",
+ "embassy-futures",
  "embassy-rp",
+ "embassy-sync",
  "embassy-time",
  "embassy-usb",
+ "hsmc",
+ "libm",
  "panic-reset",
  "portable-atomic",
+ "smart-leds",
  "static_cell",
  "usbd-hid",
 ]
@@ -810,6 +839,12 @@ version = "0.2.185"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "52ff2c0fe9bc6cb6b14a0592c2ff4fa9ceb83eea9db979b0487cd054946a2b8f"
 
+[[package]]
+name = "libm"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
+
 [[package]]
 name = "litrs"
 version = "1.0.0"