Add Recent Transactions pagination and table view to with filtering

Convert the Recent Transactions card from a list view to a paginated table
  with enhanced filtering capabilities for super users.

Frontend changes:
  - Replace q-list with q-table for better data presentation
  - Add pagination with configurable page size (default: 20 items)
  - Add transaction filter dropdown for super users to filter by username
  - Define table columns: Status, Date, Description, User, Amount, Fiat, Reference
  - Implement prev/next page navigation with page info display
  - Add filter controls with clear filter button

Backend changes (views_api.py):
  - Add pagination support with limit/offset parameters
  - Add filter_user_id parameter for filtering by user (super user only)
  - Enrich transaction entries with user_id and username from account lookups
  - Return paginated response with total count and pagination metadata

Database changes (crud.py):
  - Update get_all_journal_entries() to support offset parameter
  - Update get_journal_entries_by_user() to support offset parameter
  - Add count_all_journal_entries() for total count
  - Add count_journal_entries_by_user() for user-specific count

This improves the Recent Transactions UX by providing better organization, easier navigation through large transaction lists, and the ability for admins to filter transactions by user.

views_api.py

@@ -267,10 +267,12 @@ async def api_get_user_entries(
     wallet: WalletTypeInfo = Depends(require_invoice_key),
     limit: int = 20,
     offset: int = 0,
+    filter_user_id: str = None,
 ) -> dict:
     """Get journal entries that affect the current user's accounts"""
     from lnbits.settings import settings as lnbits_settings
-    from .crud import count_all_journal_entries, count_journal_entries_by_user
+    from lnbits.core.crud.users import get_user
+    from .crud import count_all_journal_entries, count_journal_entries_by_user, get_account
 
     # If super user, show all journal entries
     if wallet.wallet.user == lnbits_settings.super_user:
@@ -280,8 +282,40 @@ async def api_get_user_entries(
         entries = await get_journal_entries_by_user(wallet.wallet.user, limit, offset)
         total = await count_journal_entries_by_user(wallet.wallet.user)
 
+    # Filter by user_id if specified (super user only)
+    if filter_user_id and wallet.wallet.user == lnbits_settings.super_user:
+        entries = [e for e in entries if any(
+            line.account_id in [acc["id"] for acc in await db.fetchall(
+                "SELECT id FROM accounts WHERE user_id = :user_id",
+                {"user_id": filter_user_id}
+            )]
+            for line in e.lines
+        )]
+        total = len(entries)
+
+    # Enrich entries with username information
+    enriched_entries = []
+    for entry in entries:
+        # Find user_id from entry lines (look for user-specific accounts)
+        entry_user_id = None
+        entry_username = None
+
+        for line in entry.lines:
+            account = await get_account(line.account_id)
+            if account and account.user_id:
+                entry_user_id = account.user_id
+                user = await get_user(account.user_id)
+                entry_username = user.username if user and user.username else account.user_id[:16] + "..."
+                break
+
+        enriched_entries.append({
+            **entry.dict(),
+            "user_id": entry_user_id,
+            "username": entry_username,
+        })
+
     return {
-        "entries": entries,
+        "entries": enriched_entries,
         "total": total,
         "limit": limit,
         "offset": offset,