chore: restore unrelated UI files to main (out of scope)

native-chat-session-option-labels.ts and skill-freshness-group.tsx switch
tweaks were unrelated to GitHub API outage attribution — they fix pre-existing
switch-exhaustiveness lint on main, which this PR's CI (oxlint) doesn't gate on.
Restore them to origin/main so this PR's diff stays focused; the exhaustiveness
cleanup belongs in its own change. (sync-runtime-graph.ts is already identical
to main, so no diff there to revert.)

src/renderer/src/components/native-chat/native-chat-session-option-labels.ts

@@ -55,7 +55,7 @@ export function nativeChatSessionOptionDisabledReason(
         'components.native-chat.composer.availableAfterSessionStarts',
         'Available after the session starts.'
       )
-    case undefined:
+    default:
       return null
   }
 }

src/renderer/src/components/skills/skill-freshness-group.tsx

@@ -85,9 +85,7 @@ function chipTooltip(chip: SkillLocationChip): string {
 // Why: a skill is skipped for one concrete reason; lead with the highest-priority
 // blocking placement so the sentence explains the real cause (an edited copy is
 // more useful to surface than a downstream symptom).
-type SkippedReasonChip = Exclude<SkillLocationChip, 'current' | 'duplicate'>
-
-const SKIPPED_REASON_PRIORITY: readonly SkippedReasonChip[] = [
+const SKIPPED_REASON_PRIORITY: SkillLocationChip[] = [
   'unrecognized',
   'read-only',
   'inaccessible',
@@ -136,7 +134,7 @@ function skippedReason(locations: readonly SkillLocationRow[]): string {
         'auto.components.skills.SkillFreshnessRow.skippedReasonBrokenLink',
         'This copy is a shortcut to something that no longer exists, so Orca left it out — you can safely delete it.'
       )
-    case undefined:
+    default:
       return translate(
         'auto.components.skills.SkillFreshnessRow.cantUpdateReason',
         'Orca left this skill out of the update command.'