feat(web/panettone): Allow editing issues

Allow editing both the subject and the body of issues, recording events
indicating the edit and displaying those events in the issue history.

Fixes: #14
Change-Id: I9ed05271ce9bf6bda4e56f15e249c0f28c862b27
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1517
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

web/panettone/src/css.lisp

@@ -4,6 +4,9 @@
 (defparameter color/black
   "rgb(24, 24, 24)")
 
+(defparameter color/light-gray
+  "#EEE")
+
 (defparameter color/gray
   "#8D8D8D")
 
@@ -105,7 +108,8 @@
     ((:and input (:= type "submit"))
      :-webkit-appearance "none"
      :border "none"
-     :cursor "pointer")
+     :cursor "pointer"
+     :font-size "1rem")
 
     ,@(button '(:and input (:= type "submit")))
 
@@ -126,6 +130,16 @@
      :justify-content "space-between"
      :align-items "center"
 
+     ,@(button '.edit-issue)
+
+     (.created-by-at
+      :flex 1)
+
+     (.edit-issue
+      :background-color ,color/light-gray
+      :flex 0
+      :margin-right "0.5rem")
+
      (.close-issue
       :background-color ,color/failure))))