docs: document inspect, style, cleanup, prettyscreenshot browse commands

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

browse/SKILL.md.tmpl

@@ -137,6 +137,30 @@ After `resume`, you get a fresh snapshot of wherever the user left off.
 
 {{SNAPSHOT_FLAGS}}
 
+## CSS Inspector & Style Modification
+
+### Inspect element CSS
+```bash
+$B inspect .header              # full CSS cascade for selector
+$B inspect                      # latest picked element from sidebar
+$B inspect --all                # include user-agent stylesheet rules
+$B inspect --history            # show modification history
+```
+
+### Modify styles live
+```bash
+$B style .header background-color #1a1a1a   # modify CSS property
+$B style --undo                              # revert last change
+$B style --undo 2                            # revert specific change
+```
+
+### Clean screenshots
+```bash
+$B cleanup --all                 # remove ads, cookies, sticky, social
+$B cleanup --ads --cookies       # selective cleanup
+$B prettyscreenshot --cleanup --scroll-to ".pricing" --width 1440 ~/Desktop/hero.png
+```
+
 ## Full Command List
 
 {{COMMAND_REFERENCE}}