menu bar: herdr-style colored state glyphs; tmux segment before the clock

the design panel's monochrome template rendering made every row look
alike; restore herdr's agent-panel visual language - green ready, yellow
working, red blocked, filled when unseen in the queue. the tmux segment
moves left of the clock so it is visible at a glance; the status item
logs what it observes for diagnosis.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 8569380..86c34fe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -116,6 +116,7 @@ dependencies = [
  "detect-core",
  "mac-notification-sys",
  "serde",
+ "serde_json",
  "toml",
  "tracing",
  "tracing-subscriber",