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">