Improve launcher initialization - silent detection after first run

Problem: System detection printed 6 [INFO] messages every time launcher started, making it feel slow and repetitive.

Solution: Only show detection messages on first run when SYS_DETECTION_COMPLETE is not set. Subsequent runs are silent while still performing detection.

Changes:
- lib/system-detect.sh: Added silent detection check to all detect_* functions
  Lines 40, 99, 137, 186, 213, 278: [ -n "$SYS_DETECTION_COMPLETE" ] || print_info
- REFDB_FORMAT.txt: Added documentation preferences section

Result: Clean, fast launcher after first initialization

REFDB_FORMAT.txt

@@ -3564,3 +3564,29 @@ documentation:
     - "AlmaLinux 8/9 compatibility details"
     - "Tool installation instructions"
 
+
+[DOCUMENTATION_PREFERENCES]
+updated: 2025-12-16
+
+DO NOT CREATE:
+  - /tmp/*COMPLETE*.txt (final completion reports)
+  - /tmp/*SUMMARY*.txt (session summaries)
+  - /tmp/*STATUS*.txt (status reports)
+  - Lengthy documentation files in /tmp
+
+User does NOT read lengthy documentation files.
+
+INSTEAD:
+  - Update REFDB_FORMAT.txt as you work (this file)
+  - Brief inline progress (1-2 sentences)
+  - Document changes in relevant sections above
+  - Keep user updates concise
+
+WORKFLOW:
+  1. Make changes
+  2. Test
+  3. Update REFDB_FORMAT.txt
+  4. Commit (no Claude signatures - see line 612)
+  5. Push
+  6. Brief update (1-2 sentences)
+