Show a commit message placeholder when there is no message

This way we can still navigate to the single commit view.

src/views/repos/Cob/CobCommitTeaser.svelte

@@ -76,7 +76,13 @@
           commit: commit.id,
         }}>
         <div class="summary" use:twemoji>
-          <InlineTitle fontSize="body-m-regular" content={commit.summary} />
+          {#if !commit.summary}
+            <span style:color="var(--color-text-tertiary)">
+              No commit message
+            </span>
+          {:else}
+            <InlineTitle fontSize="body-m-regular" content={commit.summary} />
+          {/if}
         </div>
       </Link>
       {#if commit.description}

src/views/repos/Commit.svelte

@@ -86,7 +86,15 @@
     <div class="header">
       <div style="display:flex; flex-direction: column; gap: 0.5rem;">
         <span class="title">
-          <InlineTitle fontSize="heading-l" content={header.summary} />
+          {#if !header.summary}
+            <span
+              class="txt-heading-l"
+              style:color="var(--color-text-tertiary)">
+              No commit message
+            </span>
+          {:else}
+            <InlineTitle fontSize="heading-l" content={header.summary} />
+          {/if}
           <div class="button-container">
             <Link
               route={{

src/views/repos/Commit/CommitTeaser.svelte

@@ -87,7 +87,13 @@
         }}>
         <div style="position: relative;">
           <div class="summary" use:twemoji>
-            <InlineTitle fontSize="body-m-regular" content={commit.summary} />
+            {#if !commit.summary}
+              <span style:color="var(--color-text-tertiary)">
+                No commit message
+              </span>
+            {:else}
+              <InlineTitle fontSize="body-m-regular" content={commit.summary} />
+            {/if}
           </div>
         </div>
       </Link>