Fix: Add clear instructions for manual Z-offset calibration

CARTOGRAPHER_SCAN_CALIBRATE requires manual interaction when no
calibration exists. The macro was continuing without waiting for
user input, resulting in incorrect Z values (395mm!).

Updated macros:
- CALIBRATE_PROBE: Added detailed instructions for TESTZ/ACCEPT/ABORT
- CALIBRATE_Z_OFFSET: Added step-by-step console instructions

Users now see clear guidance:
- TESTZ Z=0.01 → Move nozzle DOWN (closer to bed)
- TESTZ Z=-0.01 → Move nozzle UP (away from bed)
- ACCEPT → Finish calibration
- ABORT → Cancel

Note: QUICK_TOUCH uses CARTOGRAPHER_TOUCH which works automatically.

calibration/calibration_macros.cfg

@@ -48,7 +48,20 @@ gcode:
     G28
     
     RESPOND MSG="Step 3: Cartographer Z0 calibration..."
-    RESPOND MSG="Follow prompts in console"
+    RESPOND MSG=""
+    RESPOND MSG="⚠️ MANUAL INTERACTION REQUIRED!"
+    RESPOND MSG=""
+    RESPOND MSG="Cartographer will prompt for manual Z adjustment."
+    RESPOND MSG="In console, use these commands:"
+    RESPOND MSG="  TESTZ Z=0.01   - Move nozzle DOWN (closer to bed)"
+    RESPOND MSG="  TESTZ Z=-0.01  - Move nozzle UP (away from bed)"
+    RESPOND MSG="  TESTZ Z=0.005  - Fine adjustment"
+    RESPOND MSG=""
+    RESPOND MSG="When nozzle barely touches paper:"
+    RESPOND MSG="  ACCEPT - Finish calibration"
+    RESPOND MSG="  ABORT  - Cancel"
+    RESPOND MSG=""
+    RESPOND MSG="Starting probe now - watch the console!"
     
     # Start Cartographer calibration (Survey Touch)
     CARTOGRAPHER_SCAN_CALIBRATE