settings: add factory reset button that wipes every table incl. config

the existing clear-scan button only drops media_items + related; settings
survived. useful when schema changes or corrupt state make you want a full
do-over on a running container without ssh-ing in to rm data/netfelix.db.

POST /api/settings/reset truncates everything (config included) then re-seeds
DEFAULT_CONFIG via the exported reseedDefaults helper. env-var overrides keep
working through getConfig's env fallback. ui lives next to clear-scan in the
danger zone with a double confirm and reload to /, so the setup wizard shows.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/api/settings.ts

@@ -1,5 +1,5 @@
 import { Hono } from "hono";
-import { getAllConfig, getDb, getEnvLockedKeys, setConfig } from "../db/index";
+import { getAllConfig, getDb, getEnvLockedKeys, reseedDefaults, setConfig } from "../db/index";
 import { getUsers, testConnection as testJellyfin } from "../services/jellyfin";
 import { testConnection as testRadarr } from "../services/radarr";
 import { getScheduleConfig, type ScheduleConfig, updateScheduleConfig } from "../services/scheduler";
@@ -122,4 +122,26 @@ app.post("/clear-scan", (c) => {
 	return c.json({ ok: true });
 });
 
+/**
+ * Full factory reset. Truncates every table including config, re-seeds the
+ * defaults so the setup wizard reappears, and returns. Env-backed config
+ * keys (JELLYFIN_URL, etc.) continue to resolve via getConfig's env fallback
+ * — they don't live in the DB to begin with.
+ */
+app.post("/reset", (c) => {
+	const db = getDb();
+	db.transaction(() => {
+		// Order matters when ON DELETE CASCADE isn't consistent across versions.
+		db.prepare("DELETE FROM stream_decisions").run();
+		db.prepare("DELETE FROM jobs").run();
+		db.prepare("DELETE FROM subtitle_files").run();
+		db.prepare("DELETE FROM review_plans").run();
+		db.prepare("DELETE FROM media_streams").run();
+		db.prepare("DELETE FROM media_items").run();
+		db.prepare("DELETE FROM config").run();
+	})();
+	reseedDefaults();
+	return c.json({ ok: true });
+});
+
 export default app;

server/db/index.ts

@@ -102,6 +102,11 @@ function seedDefaults(db: Database): void {
 	}
 }
 
+/** Re-seed config defaults after a truncating reset. Caller owns the delete. */
+export function reseedDefaults(): void {
+	seedDefaults(getDb());
+}
+
 export function getConfig(key: string): string | null {
 	// Env vars take precedence over DB
 	const fromEnv = envValue(key);