Move C-state name cleaning to agent for smaller JSON

- Agent now extracts "C" + digits pattern (C3, C10) using char parsing
- Removes suffixes like "_ACPI", "_MWAIT" at source
- Reduces JSON payload size over ZMQ
- No regex dependency - uses fast char iteration (~1μs overhead)
- Robust fallback to original name if pattern not found
- Dashboard simplified to use clean names directly

Bump version to v0.1.212

Co-Authored-By: Claude <noreply@anthropic.com>

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.210"
+version = "0.1.211"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.210"
+version = "0.1.211"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.210"
+version = "0.1.211"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.211"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/cpu.rs

@@ -135,10 +135,23 @@ impl CpuCollector {
             if let Ok(time_str) = utils::read_proc_file(&time_path) {
                 if let Ok(time) = utils::parse_u64(time_str.trim()) {
                     if let Ok(name) = utils::read_proc_file(&name_path) {
-                        let state_name = name.trim().to_string();
+                        let state_name = name.trim();
                         // Skip POLL state (not real idle)
                         if state_name != "POLL" && time > 0 {
-                            cstate_times.push((state_name, time));
+                            // Extract "C" + digits pattern (C3, C10, etc.) to reduce JSON size
+                            // Handles formats like "C3_ACPI", "C10_MWAIT", etc.
+                            let clean_name = if let Some(c_pos) = state_name.find('C') {
+                                let rest = &state_name[c_pos + 1..];
+                                let digit_count = rest.chars().take_while(|c| c.is_ascii_digit()).count();
+                                if digit_count > 0 {
+                                    state_name[c_pos..c_pos + 1 + digit_count].to_string()
+                                } else {
+                                    state_name.to_string()
+                                }
+                            } else {
+                                state_name.to_string()
+                            };
+                            cstate_times.push((clean_name, time));
                             total_time += time;
                         }
                     }

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.211"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/widgets/system.rs

@@ -144,13 +144,10 @@ impl SystemWidget {
         }
 
         // Format top 3 C-states with percentages: "C10:79% C8:10% C6:8%"
-        // Strip suffixes like "_ACPI" from state names
+        // Agent already sends clean names (C3, C10, etc.)
         self.cpu_cstates
             .iter()
-            .map(|cs| {
+            .map(|cs| format!("{}:{:.0}%", cs.name, cs.percent))
-                let clean_name = cs.name.split('_').next().unwrap_or(&cs.name);
-                format!("{}:{:.0}%", clean_name, cs.percent)
-            })
             .collect::<Vec<_>>()
             .join(" ")
     }

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.211"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]