feat(skills): enable Hermes in unified Skills management

Wire hermes through SkillApps struct, DAO SQL, command parser, and
SKILLS_APP_IDS. Add a Skills entry to the Hermes toolbar. Simplify
skill_sync test fixtures to use SkillApps::default().

src/App.tsx

@@ -1388,6 +1388,15 @@ function App() {
                         >
                           {activeApp === "hermes" ? (
                             <>
+                              <Button
+                                variant="ghost"
+                                size="sm"
+                                onClick={() => setCurrentView("skills")}
+                                className="text-muted-foreground hover:text-foreground hover:bg-black/5 dark:hover:bg-white/5"
+                                title={t("skills.manage")}
+                              >
+                                <Wrench className="w-4 h-4" />
+                              </Button>
                               <Button
                                 variant="ghost"
                                 size="sm"

src/config/appConfig.tsx

@@ -24,16 +24,17 @@ export const APP_IDS: AppId[] = [
   "hermes",
 ];
 
-/** App IDs shown in Skills panels (excludes OpenClaw and Hermes — neither supports Skills) */
+/** App IDs shown in Skills panels (excludes OpenClaw — it doesn't support Skills) */
 export const SKILLS_APP_IDS: AppId[] = [
   "claude",
   "codex",
   "gemini",
   "opencode",
+  "hermes",
 ];
 
 /** App IDs shown in MCP panels (excludes OpenClaw) */
-export const MCP_APP_IDS: AppId[] = [...SKILLS_APP_IDS, "hermes"];
+export const MCP_APP_IDS: AppId[] = [...SKILLS_APP_IDS];
 
 export const APP_ICON_MAP: Record<AppId, AppConfig> = {
   claude: {