Add pending transaction handling and duplicate reconciliation logic (#602)

* Add pending transaction handling and duplicate reconciliation logic

- Implemented logic to exclude pending transactions from budgets and analytics calculations.
- Introduced mechanisms for reconciling pending transactions with posted versions.
- Added duplicate detection with support for merging or dismissing matches.
- Updated transaction search filters to include a `status_filter` for pending/confirmed transactions.
- Introduced UI elements for reviewing and resolving duplicates.
- Enhanced `ProviderSyncSummary` with stats for reconciled and stale pending transactions.

* Refactor translation handling and enhance transaction and sync logic

- Moved hardcoded strings to locale files for improved translation support.
- Refined styling for duplicate transaction indicators and sync summaries.
- Improved logic for excluding stale pending transactions and updating timestamps on batch exclusion.
- Added unique IDs to status filters for better element targeting in UI.
- Optimized database queries to avoid N+1 issues in stale pending calculations.

* Add sync settings and enhance pending transaction handling

- Introduced a new "Sync Settings" section in hosting settings with UI to toggle inclusion of pending transactions.
- Updated handling of pending transactions with improved inference logic for `posted=0` and `transacted_at` in processors.
- Added priority order for pending transaction inclusion: explicit argument > environment variable > runtime configurable setting.
- Refactored settings and controllers to store updated sync preferences.

* Refactor sync settings and pending transaction reconciliation

- Extracted logic for pending transaction reconciliation, stale exclusion, and unmatched tracking into dedicated methods for better maintainability.
- Updated sync settings to infer defaults from multiple provider environment variables (`SIMPLEFIN_INCLUDE_PENDING`, `PLAID_INCLUDE_PENDING`).
- Refined UI and messaging to handle multi-provider configurations in sync settings.

# Conflicts:
#	app/models/simplefin_item/importer.rb

* Debounce transaction reconciliation during imports

- Added per-run reconciliation debouncing to prevent repeated scans for the same account during chunked history imports.
- Trimmed size of reconciliation stats to retain recent details only.
- Introduced error tracking for reconciliation steps to improve UI visibility of issues.

* Apply ABS() in pending transaction queries and improve error handling

- Updated pending transaction logic to use ABS() for consistent handling of negative amounts.
- Adjusted amount bounds calculations to ensure accuracy for both positive and negative values.
- Refined exception handling in `merge_duplicate` to log failures and update user alert.
- Replaced `Date.today` with `Date.current` in tests to ensure timezone consistency.
- Minor optimization to avoid COUNT queries by loading limited records directly.

* Improve error handling in duplicate suggestion and dismissal logic

- Added exception handling for `store_duplicate_suggestion` to log failures and prevent crashes during fuzzy/low-confidence matches.
- Enhanced `dismiss_duplicate` action to handle `ActiveRecord::RecordInvalid` and display appropriate user alerts.

---------

Co-authored-by: Josh Waldrep <joshua.waldrep5+github@gmail.com>

app/models/income_statement.rb

@@ -12,7 +12,9 @@ class IncomeStatement
   end
 
   def totals(transactions_scope: nil, date_range:)
-    transactions_scope ||= family.transactions.visible
+    # Default to excluding pending transactions from budget/analytics calculations
+    # Pending transactions shouldn't affect budget totals until they post
+    transactions_scope ||= family.transactions.visible.excluding_pending
 
     result = totals_query(transactions_scope: transactions_scope, date_range: date_range)
 
@@ -64,7 +66,8 @@ class IncomeStatement
     end
 
     def build_period_total(classification:, period:)
-      totals = totals_query(transactions_scope: family.transactions.visible.in_period(period), date_range: period.date_range).select { |t| t.classification == classification }
+      # Exclude pending transactions from budget calculations
+      totals = totals_query(transactions_scope: family.transactions.visible.excluding_pending.in_period(period), date_range: period.date_range).select { |t| t.classification == classification }
       classification_total = totals.sum(&:total)
 
       uncategorized_category = family.categories.uncategorized