clarify app release build flow

src/pages/applications/BuildManagementPage.tsx

@@ -100,8 +100,7 @@ export function BuildManagementPage() {
       setSelectedComponentId((prev) => {
         const valid = filteredSources.some((source) => source.id === prev);
         const next = valid ? prev : filteredSources[0]?.id || '';
-        const nextSource = filteredSources.find((source) => source.id === next);
-        setBranch(nextSource?.branch || 'develop');
+        setBranch('develop');
         return next;
       });
     } finally {
@@ -137,7 +136,7 @@ export function BuildManagementPage() {
     if (!componentOptions.some((source) => source.id === selectedComponentId)) {
       const nextComponent = componentOptions[0];
       setSelectedComponentId(nextComponent?.id || '');
-      setBranch(nextComponent?.branch || 'develop');
+      setBranch('develop');
     }
   }, [componentOptions, selectedComponentId]);
 
@@ -225,9 +224,8 @@ export function BuildManagementPage() {
                 className="mt-2 h-9 w-full rounded-md border border-input bg-background px-3 text-sm text-foreground outline-none focus:ring-2 focus:ring-ring"
                 value={selectedComponent?.id ?? ''}
                 onChange={(event) => {
-                  const next = componentOptions.find((source) => source.id === event.target.value);
                   setSelectedComponentId(event.target.value);
-                  setBranch(next?.branch || 'develop');
+                  setBranch('develop');
                 }}
               >
                 {componentOptions.length === 0 ? <option value="">구성요소 없음</option> : null}
@@ -242,8 +240,6 @@ export function BuildManagementPage() {
                 onChange={(event) => setBranch(event.target.value)}
               >
                 <option value="develop">develop</option>
-                <option value="release">release</option>
-                <option value="main">main</option>
               </select>
             </label>
             <label className="block md:col-span-2">

src/pages/applications/ReleaseManagementPage.tsx

@@ -29,6 +29,10 @@ function statusTone(status: string): 'neutral' | 'green' | 'amber' | 'red' | 'bl
 type ImageTags = {
   images?: Record<string, string>;
   artifacts?: Record<string, string>;
+  error?: string;
+  promotion?: {
+    sourceBuildJobIds?: string[];
+  };
 };
 
 function releaseArtifacts(release: AppRelease) {
@@ -71,6 +75,17 @@ function usedReleaseValues(releases: AppRelease[]) {
   return new Set(releases.flatMap(releaseArtifacts));
 }
 
+function usedReleaseBuildIds(releases: AppRelease[]) {
+  const ids = new Set<string>();
+  for (const release of releases) {
+    const imageTags = release.imageTags as ImageTags | null | undefined;
+    for (const id of imageTags?.promotion?.sourceBuildJobIds ?? []) {
+      ids.add(id);
+    }
+  }
+  return ids;
+}
+
 function latestBuildIdsByComponent(builds: BuildJob[]) {
   const map = new Map<string, BuildJob>();
   for (const build of builds) {
@@ -139,12 +154,13 @@ export function ReleaseManagementPage() {
   const [page, setPage] = useState(1);
   const loadingVisible = useMinimumLoading(loading);
   const usedValues = useMemo(() => usedReleaseValues(releases), [releases]);
+  const usedBuildIds = useMemo(() => usedReleaseBuildIds(releases), [releases]);
   const candidateBuilds = useMemo(
     () => builds.filter((build) => {
       const value = buildValue(build);
-      return isDevelopBuild(build) && Boolean(buildCommit(build)) && (!value || !usedValues.has(value));
+      return isDevelopBuild(build) && Boolean(buildCommit(build)) && !usedBuildIds.has(build.id) && (!value || !usedValues.has(value));
     }),
-    [builds, usedValues]
+    [builds, usedBuildIds, usedValues]
   );
 
   const candidateGroups = useMemo(
@@ -207,7 +223,7 @@ export function ReleaseManagementPage() {
     if (!selectedAppId) return;
     try {
       await createRelease({ appId: selectedAppId, version, branch: 'release', buildJobIds: selectedBuildIds });
-      toast({ type: 'success', message: '릴리즈가 생성되었습니다.' });
+      toast({ type: 'success', message: '릴리즈 생성을 시작했습니다.' });
       setVersion('');
       setSelectedBuildIds([]);
       setReleaseModalOpen(false);
@@ -222,7 +238,7 @@ export function ReleaseManagementPage() {
       <PageTitle
         eyebrow="어플리케이션"
         title="릴리즈 관리"
-        description="검증에 성공한 develop 빌드 결과를 release 브랜치로 승격해 배포 가능한 릴리즈를 생성합니다."
+        description="검증에 성공한 develop 빌드를 release로 승격한 뒤 release 기준으로 다시 빌드합니다."
         actions={
           <Button className="h-8 px-3 text-[13px]" disabled={candidateBuilds.length === 0} onClick={() => openReleaseModal()}>
             <Plus className="size-4" />
@@ -235,7 +251,7 @@ export function ReleaseManagementPage() {
 
       <div className="grid gap-4 xl:grid-cols-[minmax(0,1fr)_320px]">
         <Card className="min-w-0 overflow-hidden">
-          <CardHeader title="릴리즈 목록" description="성공한 빌드 결과를 버전 단위로 묶은 배포 후보입니다." />
+          <CardHeader title="릴리즈 목록" description="release 브랜치에서 빌드된 산출물 기준의 배포 후보입니다." />
           <div className="space-y-3 p-4">
             {filteredReleases.length === 0 ? (
               <div className="flex min-h-44 items-center justify-center text-center text-sm text-muted-foreground">
@@ -299,7 +315,7 @@ export function ReleaseManagementPage() {
         </Card>
 
         <Card className="min-w-0 overflow-hidden">
-          <CardHeader title="릴리즈 후보" description="아직 릴리즈에 포함되지 않은 develop 성공 빌드입니다." />
+          <CardHeader title="릴리즈 후보" description="아직 릴리즈 처리에 사용되지 않은 develop 성공 빌드입니다." />
           <div className="space-y-3 p-4">
             {candidateGroups.length === 0 ? (
               <div className="rounded-md border border-border px-3 py-4 text-center text-sm text-muted-foreground">
@@ -333,7 +349,7 @@ export function ReleaseManagementPage() {
           </select>
           <input className="h-9 w-full rounded-md border border-input bg-background px-3 text-sm outline-none" value={version} onChange={(event) => setVersion(event.target.value)} placeholder="버전 예: 0.1.1" />
           <div className="rounded-md border border-border bg-muted/20 px-3 py-2 text-xs leading-5 text-muted-foreground">
-            develop 성공 빌드만 선택할 수 있으며, 생성 시 각 저장소의 release 브랜치를 선택한 commit으로 fast-forward 합니다.
+            선택한 develop 커밋을 release로 승격한 뒤 release 브랜치에서 다시 빌드합니다.
           </div>
           <div className="max-h-72 space-y-2 overflow-y-auto rounded-md border border-border p-2">
             {modalBuilds.length === 0 ? (