diff --git a/src/common/ui/form/components/richtext.tsx b/src/common/ui/form/components/richtext.tsx
index 72b3c8dd..8edfef47 100644
--- a/src/common/ui/form/components/richtext.tsx
+++ b/src/common/ui/form/components/richtext.tsx
@@ -76,6 +76,28 @@ export const RichTextEditor: React.FC<RichTextEditorProps> = ({
         HTMLAttributes: {
           class: "text-blue-600 hover:text-blue-800 underline",
         },
+      }).extend({
+        addKeyboardShortcuts() {
+          return {
+            // Ctrl/Cmd+K: add a link on plain text, or edit the URL when the
+            // cursor is on hyperlinked text (the prompt pre-fills with the
+            // existing href). Submitting an empty string removes the link.
+            "Mod-k": () => {
+              const previousUrl: string | undefined = this.editor.getAttributes("link").href;
+              const url = window.prompt("Enter URL:", previousUrl ?? "");
+
+              if (url === null) return false;
+
+              if (url === "") {
+                this.editor.chain().focus().extendMarkRange("link").unsetLink().run();
+                return true;
+              }
+
+              this.editor.chain().focus().extendMarkRange("link").setLink({ href: url }).run();
+              return true;
+            },
+          };
+        },
       }),
     ],
     content: value || `<p>${placeholder ?? ""}</p>`,
diff --git a/src/entities/campaign/components/editor.tsx b/src/entities/campaign/components/editor.tsx
index aaa0887e..370c31b1 100644
--- a/src/entities/campaign/components/editor.tsx
+++ b/src/entities/campaign/components/editor.tsx
@@ -135,13 +135,24 @@ export const CampaignEditor = ({ existingData, campaignId, close }: CampaignEdit
   // Keep the min attribute on datetime inputs up to date (client-side only).
   useEffect(() => {
     const updateMinDateTime = () => {
-      const newMin = Temporal.Now.instant()
-        .add({ minutes: 1 })
+      const newMinInstant = Temporal.Now.instant().add({ minutes: 1 });
+
+      const newMin = newMinInstant
         .toZonedDateTimeISO(Temporal.Now.timeZoneId())
         .toPlainDateTime()
         .toString({ smallestUnit: "minute" });
 
       setMinStartDateTime(newMin);
+
+      // If the form's stored start_ms has fallen into the past while the user
+      // was filling out the rest of the form, silently bump it to the new min.
+      // Otherwise submit fails with a confusing "please fill in required field"
+      // browser error because the input value is now below its min attribute.
+      const currentStartMs = form.getValues("start_ms");
+
+      if (typeof currentStartMs === "number" && currentStartMs < newMinInstant.epochMilliseconds) {
+        form.setValue("start_ms", newMinInstant.epochMilliseconds, { shouldDirty: true });
+      }
     };
 
     // Set initial value immediately on mount (client-side only)
@@ -151,7 +162,7 @@ export const CampaignEditor = ({ existingData, campaignId, close }: CampaignEdit
     const interval = setInterval(updateMinDateTime, 60000);
 
     return () => clearInterval(interval);
-  }, []);
+  }, [form]);
 
   // "Set to current" — sets start date to right now
   const handleStartNow = () => {