extras/powershell_greeting: fix WezTerm logo stretch (iterm + preserveAspectRatio)

kitty-direct sends c= but no rows through ConPTY (the terminal guesses the height and stretches); the plain kitty type needs tty pixel queries that ConPTY drops. The iterm type with preserveAspectRatio=1 letterboxes any aspect ratio.

extras/powershell_greeting/J621Greeting.ps1

@@ -23,6 +23,7 @@
 #   J621_LOGO_TYPE          force a fastfetch logo type (sixel, kitty-direct, ...)
 #   J621_ALWAYS_FETCH=1     fetch even in terminals without image support
 #   J621_LOGO_WIDTH         logo width in columns (default 35)
+#   J621_LOGO_HEIGHT        iterm box height in rows (default 25)
 
 #Requires -Version 5.1
 
@@ -99,7 +100,7 @@ function Show-J621Greeting {
     $logoType = $env:J621_LOGO_TYPE
     if (-not $logoType) {
         if ($env:WT_SESSION) { $logoType = 'sixel' }
-        elseif ($env:WEZTERM_PANE) { $logoType = 'kitty-direct' }
+        elseif ($env:WEZTERM_PANE) { $logoType = 'iterm' }
     }
     $fetchImage = [bool]$logoType -or ($env:J621_ALWAYS_FETCH -eq '1')
     $ffArgs = @(Get-J621FastfetchArgs)
@@ -169,7 +170,16 @@ function Show-J621Greeting {
 
     # --- Display result ---
     if ($logoType) {
-        & fastfetch @ffArgs --logo-type $logoType --logo $tempFile --logo-width $logoWidth
+        $logoArgs = @('--logo-type', $logoType, '--logo', $tempFile, '--logo-width', $logoWidth)
+        if ($logoType -eq 'iterm') {
+            # Box + preserveAspectRatio: never stretched, whatever the aspect ratio
+            # (kitty-direct cannot do this through ConPTY: its payload has no rows).
+            $logoHeight = if ($env:J621_LOGO_HEIGHT) { $env:J621_LOGO_HEIGHT } else { '25' }
+            $logoArgs += @('--logo-height', $logoHeight, '--logo-preserve-aspect-ratio', 'true')
+        } elseif ($env:J621_LOGO_HEIGHT) {
+            $logoArgs += @('--logo-height', $env:J621_LOGO_HEIGHT)
+        }
+        & fastfetch @ffArgs @logoArgs
     } else {
         & fastfetch @ffArgs
     }

extras/powershell_greeting/README.md

@@ -16,7 +16,7 @@ terminals.
 | JSON parsing | `jq` / `python3` / grep | `ConvertFrom-Json` (built-in) |
 | MIME detection | `file --mime-type` | PNG/JPEG/GIF magic bytes |
 | GIFs | `gifsicle` + `kitten icat` | none: static first frame in Windows Terminal, animated in WezTerm (its `kitty-direct` plays the GIF) |
-| fastfetch logo | `--logo-type kitty --logo ... --logo-width 35` | `sixel` in Windows Terminal, `kitty-direct` in WezTerm, no image elsewhere |
+| fastfetch logo | `--logo-type kitty --logo ... --logo-width 35` | `sixel` in Windows Terminal, `iterm` (aspect-preserving box) in WezTerm, no image elsewhere |
 | Logs | `~/.config/j621Logos/logs.log` | `%APPDATA%\j621Logos\logs.log` |
 
 ## Install
@@ -99,8 +99,10 @@ switch, or just edit the file.
 - **No image logo in Windows Terminal**: WT 1.22+ is required for sixel;
   update with `winget upgrade Microsoft.WindowsTerminal`.
 - **WezTerm**: kitty graphics must be on - `config.enable_kitty_graphics = true`
-  in `~/.wezterm.lua`. If the default looks wrong, try
-  `J621_LOGO_TYPE=kitty`, `sixel`, or `iterm`.
+  in `~/.wezterm.lua`. The default uses the `iterm` logo type with
+  `preserveAspectRatio`, which never stretches. If something looks off, try
+  `J621_LOGO_TYPE=kitty-direct`, `kitty`, or `sixel` (note: through ConPTY,
+  plain `kitty` falls back to ASCII and `kitty-direct` stretches tall images).
 - **VS Code / other terminals**: no image protocol, so the greeting prints a
   plain fastfetch on purpose (no fetch delay). `J621_ALWAYS_FETCH=1` still
   fetches and prints the link.

extras/powershell_greeting/config.example.ps1

@@ -20,5 +20,7 @@ if (-not $env:J621_BASE) { $env:J621_BASE = 'https://j621.rainbow-herring.ts.net
 # if (-not $env:J621_FASTFETCH_CONFIG) { $env:J621_FASTFETCH_CONFIG = 'jake' }
 
 # Force a fastfetch logo type instead of the per-terminal default
-# (Windows Terminal -> sixel, WezTerm -> kitty-direct, others -> no image).
-# if (-not $env:J621_LOGO_TYPE) { $env:J621_LOGO_TYPE = 'kitty-direct' }
+# (Windows Terminal -> sixel, WezTerm -> iterm with preserveAspectRatio,
+# others -> no image).
+# if (-not $env:J621_LOGO_TYPE) { $env:J621_LOGO_TYPE = 'iterm' }
+# if (-not $env:J621_LOGO_HEIGHT) { $env:J621_LOGO_HEIGHT = '25' }