fix(transactions): editable transaction type, fee/interest counted as spend, fees category

- TypeBadge is now clickable — opens inline select to change debit/credit/fee/interest/etc.
- PATCH /api/transactions/[id] now accepts transaction_type, updates transactions table directly
- Analytics monthly query includes fee and interest types as spend (not just debit)
- fee and interest amounts show red in transaction list (same as debit)
- Add fees category to taxonomy

src/app/api/analytics/monthly/route.ts

@@ -38,7 +38,7 @@ export async function GET(req: NextRequest) {
     LEFT JOIN transaction_splits ts ON ts.transaction_id = t.id AND ts.participant_id = $1
     JOIN statements s ON s.id = t.statement_id
     WHERE s.owner_id = $1
-      AND t.transaction_type = 'debit'
+      AND t.transaction_type IN ('debit', 'fee', 'interest')
       AND COALESCE(o.category_override, t.category) NOT IN ('transfers', 'investment')
       AND t.transaction_date >= $2
       AND t.transaction_date < $3

src/app/api/transactions/[id]/route.ts

@@ -1,6 +1,9 @@
 import { NextRequest, NextResponse } from "next/server";
 import { getTransactionById } from "@/lib/queries";
 import { prisma } from "@/lib/db";
+import { queryRaw } from "@/lib/db";
+
+const VALID_TYPES = ["debit", "credit", "payment", "refund", "fee", "interest", "transfer"];
 
 export async function GET(
   _req: NextRequest,
@@ -20,12 +23,30 @@ export async function PATCH(
   const transactionId = Number(id);
   const body = await req.json();
 
-  const { category, merchant_normalized, notes } = body as {
+  const { category, merchant_normalized, notes, transaction_type } = body as {
     category?: string;
     merchant_normalized?: string;
     notes?: string;
+    transaction_type?: string;
   };
 
+  // transaction_type is a direct correction on the transactions table
+  if (transaction_type !== undefined) {
+    if (!VALID_TYPES.includes(transaction_type)) {
+      return NextResponse.json({ error: "Invalid transaction_type" }, { status: 400 });
+    }
+    await queryRaw(
+      `UPDATE transactions SET transaction_type = $1 WHERE id = $2`,
+      [transaction_type, transactionId]
+    );
+  }
+
+  // category/merchant/notes go through the overrides table
+  const hasOverride = category !== undefined || merchant_normalized !== undefined || notes !== undefined;
+  if (!hasOverride) {
+    return NextResponse.json({ ok: true });
+  }
+
   const data: Record<string, unknown> = { updated_at: new Date() };
   if (category !== undefined) data.category_override = category;
   if (merchant_normalized !== undefined) data.merchant_normalized = merchant_normalized;