feat: delete incident, fix git push, title template, clarify AI settings

- IncidentDetailScreen: add Delete button (confirm dialog) wired to deleteIncident()
- git.ts: fix Gitea POST vs PUT (use PUT when file exists/sha present); add
  pre-flight validation for missing URL/token/owner/repo; add 15s fetch timeout
  with AbortError handling; improve error messages with actionable hints
- [id].tsx: guard URL for Gitea/GitLab before calling pushIncidentToGit
- settings.tsx: move ToggleRow/SegmentRow/Field outside SettingsScreen to fix
  TextInput focus loss on each keystroke (component remount on rerender)
- settings.tsx: add Title Template setting with auto-increment info card
- settings.tsx: add AI base URL + model fields; expand AI section description
- new.tsx: pre-fill title from pref_title_template; increment counter after save

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

app/new.tsx

@@ -10,6 +10,7 @@ import {
   Alert,
 } from "react-native";
 import { router, useLocalSearchParams, useNavigation } from "expo-router";
+import * as SecureStore from "expo-secure-store";
 import {
   createIncident,
   updateIncident,
@@ -48,6 +49,14 @@ const LABEL_STYLE = {
 
 type VoiceField = "title" | "service" | "symptom" | "rootCause" | "fix";
 
+function incrementTemplate(template: string): string {
+  const match = template.match(/^([\s\S]*?)(\d+)$/);
+  if (!match) return template;
+  const [, prefix, numStr] = match;
+  const next = (parseInt(numStr, 10) + 1).toString().padStart(numStr.length, "0");
+  return prefix + next;
+}
+
 export default function NewIncidentScreen() {
   const { editId } = useLocalSearchParams<{ editId?: string }>();
   const navigation = useNavigation();
@@ -74,6 +83,13 @@ export default function NewIncidentScreen() {
     getDistinctServices().then(setKnownServices);
   }, []);
 
+  useEffect(() => {
+    if (editId) return;
+    SecureStore.getItemAsync("pref_title_template").then((tpl) => {
+      if (tpl) setForm((f) => ({ ...f, title: tpl }));
+    });
+  }, [editId]);
+
   useEffect(() => {
     if (!editId) return;
     navigation.setOptions({ title: "Edit Incident" });
@@ -144,6 +160,10 @@ export default function NewIncidentScreen() {
         await updateIncident(editId, form);
       } else {
         await createIncident(form);
+        const tpl = await SecureStore.getItemAsync("pref_title_template");
+        if (tpl) {
+          await SecureStore.setItemAsync("pref_title_template", incrementTemplate(tpl));
+        }
       }
       router.back();
     } catch {