fix(dev): repair hunk jump, F4 hook leak, async clone, and nil guards

- vc-config: C-; v d matched literal +/- source text via consult-line, not gutter hunks. It now completes over git-gutter's hunk list and jumps to the chosen line.
- vc-config: clipboard clone ran git synchronously, freezing every frame for the whole clone. It now runs async with a sentinel that opens the clone on success and surfaces the process buffer on failure.
- vc-config: magit-blame bound D and S to the same command. D is now difftastic-magit-diff, matching the transient.
- vc-config: dropped the :commands autoload for git-timemachine-show-selected-revision, a function the package never defined. The phantom appeared in M-x and errored.
- dev-fkeys: both F4 chained-compile handlers armed a hook on the global compilation-finish-functions before their compile ran, so a quit left it live and the next unrelated compile fired the chain. The one-shot hook now installs buffer-locally in the compilation buffer, same shape as the projectile cache-revert hooks.
- test-runner: outside a project with no global test directory, three commands crashed with wrong-type-argument on a nil path. Discovery now returns nil and the commands signal user-error.
- diff-config: removed the global "-w" ediff default, which made every session ignore whitespace (indentation-only changes compared as identical). Whitespace-ignore stays available as ediff's per-session toggle.
- restclient-config: the C-; R bindings went through raw global-set-key, silently depending on keybindings.el loading first. They now use a prefix keymap registered like the other C-; prefixes.
- httpd-config: simple-httpd loaded on a 1s timer and created www/ on every startup. It now defers until impatient-mode needs it, and the doc root is created at package load.

1 files changed, 6 insertions, 4 deletions

diff --git a/modules/httpd-config.el b/modules/httpd-config.el
index 1a2a5c61..a3ae0fac 100644
--- a/modules/httpd-config.el
+++ b/modules/httpd-config.el
@@ -5,8 +5,9 @@
 ;;
 ;; Layer: 4 (Optional).
 ;; Category: O/D/P.
-;; Load shape: eager.
-;; Eager reason: none; local web server, a command-loaded deferral candidate.
+;; Load shape: deferred.
+;; Defer reason: impatient-mode requires simple-httpd on demand; nothing
+;; needs the server (or its www/ root) at startup.
 ;; Top-level side effects: package configuration via use-package.
 ;; Runtime requires: none.
 ;; Direct test load: yes.
@@ -17,14 +18,15 @@
 ;;;; -------------------------- Simple-Httpd -------------------------
 
 (use-package simple-httpd
-  :defer 1
+  :defer t
   :preface
   (defconst cj/httpd-wwwdir (concat user-emacs-directory "www"))
   (defun cj/httpd-check-or-create-wwwdir ()
     (unless (file-exists-p cj/httpd-wwwdir)
       (make-directory cj/httpd-wwwdir)))
-  :init (cj/httpd-check-or-create-wwwdir)
   :config
+  ;; Create the doc root only when the server package actually loads.
+  (cj/httpd-check-or-create-wwwdir)
   (setq httpd-root cj/httpd-wwwdir)
   (setq httpd-show-backtrace-when-error t)
   (setq httpd-serve-files t))