fix(shell): require external-open, scope tramp revert, drop dead config

- dirvish-config, dwim-shell-config: both call cj/xdg-open (external-open) but relied on init.el requiring it before them, and dirvish's require comment misattributed it to system-utils. Added the require to both and corrected the comment and both Runtime-requires headers.
- tramp-config: revert-without-query was set to '(".*") inside the TRAMP module, so every file in Emacs reverted without confirmation. Scoped it to the TRAMP path regexp, so local files keep their revert prompt and remote files skip the round-trip.
- tramp-config: removed the sshfast method (referenced nowhere, scp and sshx handle everything) and a duplicate tramp-own-remote-path add-to-list.

Tests: new runtime-requires assertions for both modules, red first under make test-file. The tramp :config edits are verified in the daemon. Suite green.

1 files changed, 5 insertions, 17 deletions

diff --git a/modules/tramp-config.el b/modules/tramp-config.el
index 95fa83db..1c8a8ab9 100644
--- a/modules/tramp-config.el
+++ b/modules/tramp-config.el
@@ -77,9 +77,10 @@
   ;; Cache remote file attributes for better performance
   (setq remote-file-name-inhibit-cache nil)
 
-  ;; Don't check for modified buffers before revert
-  ;; to avoid unnecessary remote operations
-  (setq revert-without-query '(".*"))
+  ;; Skip the revert confirmation for remote files only, to avoid
+  ;; unnecessary remote round-trips.  Scoped to the TRAMP path regexp so
+  ;; local files keep their normal revert prompt.
+  (setq revert-without-query (list tramp-file-name-regexp))
 
   ;; Refresh buffers when needed rather than automatically
   (setq auto-revert-remote-files nil)
@@ -120,21 +121,8 @@
   ;; Default transfer method (use scp for most efficient transfer)
   (setq tramp-default-method "scp")
 
-  ;; Use different methods based on host/domain patterns
-  (add-to-list 'tramp-methods
-			   '("sshfast"
-				 (tramp-login-program "ssh")
-				 (tramp-login-args (("-l" "%u") ("-p" "%p") ("%c")
-									("-e" "none") ("-t" "-t") ("%h")))
-				 (tramp-async-args (("-q")))
-				 (tramp-remote-shell "/bin/sh")
-				 (tramp-remote-shell-login ("-l"))
-				 (tramp-remote-shell-args ("-c"))
-				 (tramp-connection-timeout 10)))
-
   ;; Remote shell and project settings
-  ;; Support for Docker containers
-  (add-to-list 'tramp-remote-path 'tramp-own-remote-path)
+  ;; Extend the remote PATH (tramp-own-remote-path already added above)
   (add-to-list 'tramp-remote-path "/usr/local/bin")
   (add-to-list 'tramp-remote-path "/usr/local/sbin")