feat(w3m): add module with desktop entry + integrate into neomutt

- modules/web/w3m: enable/package options, desktop entry via kitty,
assertion
- modules/web/w3m: delegate to programs.w3m under the hood
- modules/web/w3m: default package to programs.w3m.finalPackage
- modules/desktop/xdg: add portal config with common.default = "*"
- neomutt/nix: use lib.getExe' config.web.w3m.package for w3m refs
- neomutt/assertions: add w3m dependency assertion
- users/arpit: enable web.w3m

1 files changed, 21 insertions, 3 deletions

diff --git a/modules/communication/neomutt/macros.nix b/modules/communication/neomutt/macros.nix
index 0548a0f..87c05d1 100644
--- a/modules/communication/neomutt/macros.nix
+++ b/modules/communication/neomutt/macros.nix
@@ -11,13 +11,31 @@
       action = "<enter-command>set my_wait_key=$wait_key wait_key=no<enter><sync-mailbox><shell-escape>${lib.getExe config.scripts.neomutt-sync.package}<enter><sync-mailbox><enter-command>set wait_key=$my_wait_key<enter>";
     }
     {
-      # gx: extract links from the current message and open one, vim-netrw style
+      # gx: open the message body in interactive w3m -- real vim-style
+      # cursor navigation (hjkl, Tab/Shift-Tab between links, Enter to
+      # follow, B back, q to return to neomutt). Replaces the old
+      # urlscan-based link picker.
       map = [
         "index"
         "pager"
       ];
       key = "gx";
-      action = "<pipe-message>urlscan<Enter>";
+      action = "<pipe-message>urlscan<enter>";
+    }
+    {
+      # Ctrl-B in the pager: same interactive w3m view as gx, kept as
+      # a second binding since Ctrl-B is a common muscle-memory key
+      # for "open this in a browser-like view".
+      map = [ "pager" ];
+      key = "\\Cb";
+      action = "<enter-command>set my_pipe_decode=$pipe_decode pipe_decode=yes<enter><pipe-message>${lib.getExe' config.web.w3m.package "w3m"} -T text/html<enter><enter-command>set pipe_decode=$my_pipe_decode<enter>";
+    }
+    {
+      # Ctrl-B on a specific attachment (not just the top-level
+      # message): pipe-entry sends the selected attachment instead.
+      map = [ "attach" ];
+      key = "\\Cb";
+      action = "<pipe-entry>${lib.getExe' config.web.w3m.package "w3m"} -cols 100 -T text/html<enter>";
     }
     {
       map = [
@@ -32,7 +50,7 @@
       # the counterpart to gf (interactive limit prompt) in binds.nix
       map = [ "index" ];
       key = "gF";
-      action = "<limit>~A<enter>";
+      action = "<limit>all<enter>";
     }
     {
       # ZZ: save and quit, vim-style (sync mailbox, then quit)