chore: update casts and support scripts

docs/demo.tape

@@ -1,11 +1,11 @@
-# improvise demo — pivot axis reassignment
+# improvise demo — formulas, command mode, drill, records, and axis reassignment
 # Run: nix develop --command vhs docs/demo.tape
 
 Output docs/demo.gif
 
 Set FontSize 14
-Set Width 1200
-Set Height 650
+Set Width 1440
+Set Height 800
 Set Theme "Dracula"
 
 # Hide the shell prompt and startup
@@ -15,39 +15,91 @@ Enter
 Sleep 2s
 Show
 
-# Show the initial pivot: Product×Region on rows, Date_Month×Measure on columns
+# Show the initial pivot view
 Sleep 2s
 
-# Enter tile mode
+# Prune empty rows for a cleaner view
+Type "P"
+Sleep 2s
+
+# Open formula panel — show existing Profit formula
+Type "F"
+Sleep 2s
+
+# Add a Margin formula
+Type "n"
+Sleep 500ms
+Type "Margin = 100 * Profit / Revenue"
+Sleep 1s
+Enter
+Sleep 2s
+
+# Close formula panel
+Escape
+Sleep 2s
+
+# Use command mode to hide Date_Month (collapse time dimension)
+Type ":"
+Sleep 800ms
+Type "set-axis Date_Month none"
+Sleep 1500ms
+Enter
+Sleep 2s
+
+# Drill into a Revenue cell to see individual records
+# Navigate down to a row with data
+Type "jjj"
+Sleep 500ms
+# Drill
+Type ">"
+Sleep 2s
+
+# Browse the drill records
+Type "jj"
+Sleep 1s
+
+# Go back
+Type "<"
+Sleep 2s
+
+# Toggle records mode to see flat record view
+Type "R"
+Sleep 2s
+
+# Scroll through records
+Type "jjjjj"
+Sleep 1s
+
+# Back to pivot mode
+Type "R"
+Sleep 2s
+
+# Enter tile mode to reassign axes
 Type "T"
 Sleep 1s
 
-# Navigate to Region tile (index 5: _Index, _Dim, Customer, Date, Product, Region)
+# Navigate to Region tile
 Type "lllll"
 Sleep 800ms
 
-# Move Region from Row to Column axis
+# Move Region from Row to Column
 Type "c"
 Sleep 2s
 
-# Navigate back to Customer tile (index 2)
+# Navigate back to Customer tile
 Type "hhh"
 Sleep 600ms
 
-# Move Customer from Page to Row axis
+# Move Customer from Page to Row
 Type "r"
 Sleep 2s
 
 # Exit tile mode
 Escape
-Sleep 1500ms
-
-# Transpose to show another arrangement
-Type "t"
 Sleep 2s
 
 # Quit without recording the exit
 Hide
-Type ":q"
+Type ":q!"
 Enter
 Sleep 500ms