fix(skills): use acceptedSkills instead of listFull; cross-source slug check

- Replace redundant listFull() call with acceptedSkills to avoid extra DB round-trip
- Check slug conflicts against full acceptedSkills list instead of just same-source skills
- Call upsertAcceptedSkill after persisting to keep in-memory list current

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/services/company-skills.ts

@@ -2017,7 +2017,7 @@ export function companySkillService(db: Db) {
     }
 
     // Re-scan GitHub/sks_sh sources to pick up newly added skills
-    const existingSkills = await listFull(companyId);
+    const existingSkills = acceptedSkills;
     const sourceByLocator = new Map<string, CompanySkill[]>();
     for (const skill of existingSkills) {
       if (skill.sourceType !== "github" && skill.sourceType !== "skills_sh") continue;
@@ -2030,12 +2030,15 @@ export function companySkillService(db: Db) {
       try {
         const result = await readUrlSkillImports(companyId, sourceLocator, null);
         for (const nextSkill of result.skills) {
-          const existing = skillsAtSource.find((s) => s.slug === nextSkill.slug);
+          const existing = acceptedSkills.find((s) => s.slug === nextSkill.slug);
           if (!existing) {
             // New skill discovered — derive key and upsert
             nextSkill.key = deriveCanonicalSkillKey(companyId, nextSkill);
             const persisted = (await upsertImportedSkills(companyId, [nextSkill]))[0];
-            if (persisted) imported.push(persisted);
+            if (persisted) {
+              imported.push(persisted);
+              upsertAcceptedSkill(persisted);
+            }
           }
         }
       } catch {