Fix value parser (Hz vs Henry), accept uF/uH, redirect to parts list after create

- Drop /i flag: m (milli) vs M (mega) are now case-sensitive
- Put Hz before H in unit alternation so kHz isn't parsed as kH (kiloHenry)
- u already accepted as micro alongside µ; unit suffix optional (100u, 10k work)
- After adding a part, redirect to /parts overview instead of detail page

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

src/lib/utils/valueParser.ts

@@ -11,15 +11,18 @@ const PREFIX: Record<string, number> = {
 };
 
 // Parses a human value string into a base-SI number (Farads, Ohms, Henrys, Hz).
+// - u and µ are both accepted as micro (1e-6)
+// - Hz must come before H in the alternation to avoid "kHz" being parsed as kH (kiloHenry)
+// - No /i flag: m (milli) and M (mega) are case-sensitive
+// - Unit is optional: "10k" and "100u" parse correctly without a trailing letter
 // Returns null if unparseable (e.g. part codes like "BC547", "1N4148").
 export function parseValueNumeric(value: string | null | undefined): number | null {
 	if (!value) return null;
 
 	const s = value.trim();
 
-	// Match: digits, optional decimal, optional SI prefix, optional unit letters
-	// Handles: "100µF", "10kΩ", "4.7uH", "32.768kHz", "47R", "1M", "220"
-	const match = s.match(/^([0-9]+(?:\.[0-9]+)?)\s*([pnuµmkKMG]?)\s*([FHhzΩRω]|Hz|hz|Ohm|ohm)?/i);
+	// Match: number + optional SI prefix + optional unit (Hz before H to avoid early match)
+	const match = s.match(/^(\d+(?:\.\d+)?)\s*([pnuµmkKMG]?)\s*(Hz|Ohm|[FHΩRf])?/);
 	if (!match) return null;
 
 	const num = parseFloat(match[1]);

src/routes/(app)/parts/new/+page.server.ts

@@ -41,7 +41,7 @@ export const actions: Actions = {
 
 		const data = result.data;
 
-		const [part] = await db
+		await db
 			.insert(parts)
 			.values({
 				name: data.name || null,
@@ -58,9 +58,8 @@ export const actions: Actions = {
 				unit: data.unit,
 				locationId: data.locationId || null,
 				notes: data.notes || null
-			})
-			.returning({ id: parts.id });
+			});
 
-		redirect(303, `/parts/${part!.id}`);
+		redirect(303, '/parts');
 	}
 };