docs(readme): reduce duplicate quick-start guidance

Author: tw93

README.md

@@ -61,28 +61,23 @@ mo remove                    # Remove Mole from system
 mo --help                    # Show help
 mo --version                 # Show installed version
 
-mo clean --dry-run           # Preview the cleanup plan
-mo clean --whitelist         # Manage protected caches
-mo clean --dry-run --debug   # Detailed preview with risk levels and file info
+# Safe preview before applying changes
+mo clean --dry-run
+mo uninstall --dry-run
+mo purge --dry-run
 
-mo optimize --dry-run        # Preview optimization actions
-mo optimize --debug          # Run with detailed operation logs
+# --dry-run also works with: optimize, installer, remove, completion, touchid enable
+mo clean --dry-run --debug   # Preview + detailed logs
 mo optimize --whitelist      # Manage protected optimization rules
-mo uninstall --dry-run       # Preview app uninstall actions
-mo purge --dry-run           # Preview project artifact purge
-mo installer --dry-run       # Preview installer cleanup actions
-mo touchid enable --dry-run  # Preview Touch ID sudo config changes
-mo completion --dry-run      # Preview shell completion file updates
-mo remove --dry-run          # Preview Mole self-removal
+mo clean --whitelist         # Manage protected caches
 mo purge --paths             # Configure project scan directories
 mo analyze /Volumes          # Analyze external drives only
 ```
 
 ## Tips
 
 - Video tutorial: Watch the [Mole tutorial video](https://www.youtube.com/watch?v=UEe9-w4CcQ0), thanks to PAPAYA 電腦教室.
-- Safety first: Deletions are permanent. Review carefully with dry-run before applying changes. See [Security Audit](SECURITY_AUDIT.md).
-- Debug and logs: Use `--debug` for detailed logs. Combine with `--dry-run` for a full preview. File operations are logged to `~/.config/mole/operations.log`. Disable with `MO_NO_OPLOG=1`.
+- Safety and logs: Deletions are permanent. Review with `--dry-run` first, and add `--debug` when needed. File operations are logged to `~/.config/mole/operations.log`. Disable with `MO_NO_OPLOG=1`. See [Security Audit](SECURITY_AUDIT.md).
 - Navigation: Mole supports arrow keys and Vim bindings `h/j/k/l`.
 
 ## Features in Detail