Make the skill runbook limits a general setting

The longest runbook a skill may save and how much of it load_skill hands
back are now set on Settings > General (skill_body_max_chars,
skill_body_shown_chars), defaulting to AppData.SkillBodyMaxChars and
SkillBodyShownChars. Saving, confirming and proposing a skill check the
install's limit; a skill saved before it was lowered can still be toggled.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/pages/admin/settings/general/index.tsx

@@ -2,6 +2,7 @@ import AppearanceSection from "./(sections)/appearance-section";
 import NotificationsSection from "./(sections)/notifications-section";
 import PromptSection from "./(sections)/prompt-section";
 import RunLimitsSection from "./(sections)/run-limits-section";
+import SkillLimitsSection from "./(sections)/skill-limits-section";
 import StorageSection from "./(sections)/storage-section";
 import VersionSection from "./(sections)/version-section";
 import SettingsShell from "../(partials)/settings-shell";
@@ -17,6 +18,7 @@ export default function AdminSettingsGeneralPage() {
             <NotificationsSection />
             <PromptSection />
             <RunLimitsSection />
+            <SkillLimitsSection />
             <StorageSection />
             <VersionSection />
         </SettingsShell>