feat(select-menu): add optionMeta slot and show repo details in create dialog

Add an optional optionMeta snippet to SelectMenu to render richer,
right-aligned content per option (falls back to option.meta when not
provided). Update SelectMenu markup to render optionMeta if present.

Style adjustments for .select-menu-option-meta to align items, allow
inline SVGs, and preserve spacing/coloring.

Use the new slot in CreateReviewDialog:
- supply grouped repository options (owner + name) instead of raw names
- show a branch icon for each option and a lock icon + last-updated date
  in the option meta
- add helpers repositoryById and formatUpdatedAt to resolve repository
  data for the meta snippet

No breaking changes: legacy option.meta still works when optionMeta is
not supplied.

src/lib/components/CreateReviewDialog.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import SelectMenu from "./SelectMenu.svelte";
   import { onMount } from "svelte";
-  import { GitPullRequest, X, LoaderCircle, ArrowRight, Sparkles } from "@lucide/svelte";
+  import { GitBranch, GitPullRequest, LockKeyhole, X, LoaderCircle, ArrowRight, Sparkles } from "@lucide/svelte";
   import { credLoad, pullRequestAiGenerate, createIntegrationReviewRequest, listIntegrationRepositories, listIntegrationRepositoryBranches, listRemotes, listBranches } from "../git";
   import { integrationCredentialKey } from "../integrations";
   import type { AiSettings, GitIntegrationSource, GitIntegrationRepository, IntegrationReviewRequest, StoredCredential } from "../types";
@@ -15,6 +15,26 @@
   let dialog: HTMLDialogElement;
   let titleInput: HTMLInputElement;
   let repositories = $state<GitIntegrationRepository[]>([]);
+
+  /** Repository options grouped by owner, like the clone dialog's list. */
+  const repositoryOptions = $derived(repositories.map((repository) => {
+    const separator = repository.fullName.lastIndexOf("/");
+    return {
+      value: repository.id,
+      label: separator > 0 ? repository.fullName.slice(separator + 1) : repository.fullName,
+      group: separator > 0 ? repository.fullName.slice(0, separator) : source.label,
+    };
+  }));
+
+  function repositoryById(id: string): GitIntegrationRepository | undefined {
+    return repositories.find((repository) => repository.id === id);
+  }
+
+  function formatUpdatedAt(value: string): string {
+    if (!value) return "";
+    const date = new Date(value);
+    return Number.isNaN(date.getTime()) ? "" : new Intl.DateTimeFormat(de ? "de-DE" : "en-US", { dateStyle: "medium" }).format(date);
+  }
   let repositoryId = $state("");
   let sourceBranch = $state("");
   let targetBranch = $state("");
@@ -129,7 +149,14 @@
     <div class="body">
       {#if error}<div class="error" role="alert">{error}{#if !repositories.length && !loading}<button type="button" onclick={loadRepositories}>{de ? "Erneut laden" : "Retry"}</button>{/if}</div>{/if}
       <div class="repository-field"><div class="field-heading"><span>Repository</span><small>{loading ? "…" : `${repositories.length} ${de ? "verfügbar" : "available"}`}</small></div>
-        <SelectMenu value={repositoryId} options={repositories.map(repository => ({value:repository.id,label:repository.fullName}))} disabled={loading || busy} ariaLabel="Repository" placeholder={loading ? (de ? "Repositories werden geladen …" : "Loading repositories…") : (de ? "Repository auswählen" : "Select repository")} searchable searchPlaceholder={de ? "Repositories durchsuchen …" : "Search repositories…"} emptyText={de ? "Keine passenden Repositories" : "No matching repositories"} onChange={value => repositoryId = value}/>
+        <SelectMenu value={repositoryId} options={repositoryOptions} disabled={loading || busy} ariaLabel="Repository" placeholder={loading ? (de ? "Repositories werden geladen …" : "Loading repositories…") : (de ? "Repository auswählen" : "Select repository")} searchable searchPlaceholder={de ? "Repositories durchsuchen …" : "Search repositories…"} emptyText={de ? "Keine passenden Repositories" : "No matching repositories"} showSelectedGroup onChange={value => repositoryId = value}>
+          {#snippet optionIcon()}<GitBranch size={14} aria-hidden="true" />{/snippet}
+          {#snippet optionMeta(option)}
+            {@const repository = repositoryById(option.value)}
+            {#if repository?.private}<LockKeyhole size={11} aria-label={de ? "Privat" : "Private"} />{/if}
+            {formatUpdatedAt(repository?.updatedAt ?? "")}
+          {/snippet}
+        </SelectMenu>
       </div>
       {#if !loading && !error && !repositories.length}<p>{de ? "Keine Repositories für diese Integration gefunden." : "No repositories found for this integration."}</p>{/if}
       <div class="branches">

src/lib/components/SelectMenu.svelte

@@ -25,6 +25,8 @@
     emptyText?: string;
     /** Optional icon in front of every option, e.g. a branch or repository mark. */
     optionIcon?: Snippet<[SelectMenuOption]>;
+    /** Optional right-aligned content per option, richer than `option.meta`. */
+    optionMeta?: Snippet<[SelectMenuOption]>;
     onChange: (value: string) => void;
   }
 
@@ -40,6 +42,7 @@
     searchPlaceholder = "Search…",
     emptyText = "No results",
     optionIcon = undefined,
+    optionMeta = undefined,
     onChange,
   }: Props = $props();
 
@@ -195,7 +198,11 @@
         >
           {#if optionIcon}<span class="select-menu-option-icon">{@render optionIcon(option)}</span>{/if}
           <span class="select-menu-option-label">{option.label}</span>
-          {#if option.meta}<small class="select-menu-option-meta">{option.meta}</small>{/if}
+          {#if optionMeta}
+            <small class="select-menu-option-meta">{@render optionMeta(option)}</small>
+          {:else if option.meta}
+            <small class="select-menu-option-meta">{option.meta}</small>
+          {/if}
           {#if option.value === value}<Check size={14} aria-hidden="true" />{/if}
         </button>
       {/each}