Changelog

New CategoryManagementViewModel and CategoryManagementView providing

hierarchical category management: create/rename groups, create categories

within groups, reorder categories (move up/down), hide categories, and

per-category goal configuration (5 goal types with target amount and

optional date for NeededByDate). Rollover behavior picker per category.

Added Categories nav button to FinanceView navigation bar.

New AccountManagementViewModel and AccountManagementView providing full

account lifecycle: create (with type picker), rename, close (zero balance

check), reopen, delete (no-transactions guard), and on-budget toggle.

Left panel lists accounts grouped by status with balance display; right

panel shows selected account detail with editable name and action buttons.

Added Accounts nav button to FinanceView navigation bar.

New services: GoalService (5 goal types: MonthlySpending, WeeklySpending,

NeededByDate, SavingsBalance, MonthlySavingsBuilder with progress and

underfunded calculations), AgeOfMoneyService (FIFO matching of spending

to income), CreditCardService (funded vs unfunded CC debt, available for

payment), TransferService (conservation-law category-to-category budget

transfers). New GoalTargetType enum and ReconciliationCheckpoint record.

Category model extended with optional GoalTargetType field. Comprehensive

test coverage for all new services including edge cases.

Splits 3 oversized files to comply with modularity standards:

• ReconciliationService: extracted StringSimilarity (Jaro-Winkler,

Levenshtein, Token Jaccard) into Services/StringSimilarity.cs

• CsvStrategy: extracted CsvProfileDetector (auto-detection, delimiter,

date format) and CsvLineParser (RFC 4180 quoted fields) into separate files

• FinancePlugin.Intents: split descriptors from execution handlers into

FinancePlugin.IntentHandlers.cs

Extracts 4 nested ViewModels into dedicated files per One Thing Rule:

CategoryGroupViewModel, CategoryViewModel, TransactionViewModel,

ReconciliationMatchViewModel.

Fixes async anti-patterns:

• OnSelectedAccountChanged: wrapped fire-and-forget in try/catch
• OnAllocatedChanged: added error handling in UpdateAllocationAsync
• IShareableBehavior: replaced per-call .GetAwaiter().GetResult() with

ConcurrentDictionary cache and lazy refresh on miss

Updated test references for extracted classes.

ViewModelBase now implements IDisposable with a protected CompositeDisposable

property. Plugins can track subscriptions and event handlers via DisposeWith()

extension method to prevent memory leaks when ViewModels are deactivated.

Added System.Reactive dependency for CompositeDisposable. Added

DisposableExtensions.cs with DisposeWith<T> extension method matching the

ReactiveUI convention.