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, 34 insertions, 0 deletions

diff --git a/tests/test-httpd-config--defer.el b/tests/test-httpd-config--defer.el
new file mode 100644
index 00000000..1a1fbbed
--- /dev/null
+++ b/tests/test-httpd-config--defer.el
@@ -0,0 +1,34 @@
+;;; test-httpd-config--defer.el --- Tests for httpd-config lazy loading -*- lexical-binding: t -*-
+
+;;; Commentary:
+;; Pins httpd-config's load-time behavior: merely loading the module must
+;; not create the www directory (that belongs to the moment simple-httpd
+;; actually loads) and must not pull in simple-httpd itself —
+;; impatient-mode requires it on demand.
+
+;;; Code:
+
+(require 'ert)
+
+(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
+
+;;; Boundary Cases
+
+(ert-deftest test-httpd-config-load-creates-no-www-dir ()
+  "Boundary: loading httpd-config does not create www/ in user-emacs-directory."
+  (let* ((sandbox (make-temp-file "httpd-config-test-" t))
+         (user-emacs-directory (file-name-as-directory sandbox)))
+    (unwind-protect
+        (progn
+          (require 'httpd-config)
+          (should-not (file-directory-p
+                       (expand-file-name "www" user-emacs-directory))))
+      (delete-directory sandbox t))))
+
+(ert-deftest test-httpd-config-load-does-not-load-simple-httpd ()
+  "Boundary: loading httpd-config leaves simple-httpd unloaded."
+  (require 'httpd-config)
+  (should-not (featurep 'simple-httpd)))
+
+(provide 'test-httpd-config--defer)
+;;; test-httpd-config--defer.el ends here