feat: configure RGB colors and flash timing

install.sh

@@ -47,6 +47,40 @@ if [ -f /etc/pigway-pi-control.conf ]; then
 else
   install -m 0644 config/pigway-pi-control.conf /etc/pigway-pi-control.conf
 fi
+
+# Preserve the existing file verbatim while exposing newly configurable RGB
+# defaults. Missing keys are inserted into [led]; existing user values win.
+python3 - /etc/pigway-pi-control.conf <<'PY'
+import re,sys
+from pathlib import Path
+
+path=Path(sys.argv[1])
+text=path.read_text()
+defaults=(
+    ("cpu_r",255),("cpu_g",0),("cpu_b",0),
+    ("power_r",255),("power_g",40),("power_b",0),
+    ("memory_r",255),("memory_g",0),("memory_b",255),
+    ("storage_r",255),("storage_g",255),("storage_b",255),
+    ("network_r",0),("network_g",0),("network_b",255),
+    ("service_r",0),("service_g",255),("service_b",96),
+    ("warning_flash_on_ms",1500),("warning_flash_off_ms",1500),
+    ("critical_flash_on_ms",750),("critical_flash_off_ms",750),
+    ("emergency_flash_on_ms",300),("emergency_flash_off_ms",300),
+)
+missing=[(key,value) for key,value in defaults
+         if not re.search(rf"(?m)^\s*{re.escape(key)}\s*=",text)]
+if missing:
+    block="\n# RGB object colors (0..255) and flash timing (milliseconds).\n"
+    block+="".join(f"{key} = {value}\n" for key,value in missing)
+    match=re.search(r"(?m)^\[led\]\s*$",text)
+    if match:
+        next_section=re.search(r"(?m)^\[.+\]\s*$",text[match.end():])
+        pos=match.end()+(next_section.start() if next_section else len(text)-match.end())
+        text=text[:pos].rstrip()+"\n"+block+"\n"+text[pos:].lstrip("\n")
+    else:
+        text=text.rstrip()+"\n\n[led]\n"+block
+    path.write_text(text)
+PY
 install -m 0644 systemd/pigway-pi-control.service /etc/systemd/system/pigway-pi-control.service
 
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