feat: add AI data validation, test data generator, index advisor, and snapshots

Four new killer features leveraging AI (Ollama) and PostgreSQL internals:

- Data Validation: describe quality rules in natural language, AI generates
  SQL to find violations, run with pass/fail results and sample violations
- Test Data Generator: right-click table to generate realistic FK-aware test
  data with AI, preview before inserting in a transaction
- Index Advisor: analyze pg_stat tables + AI recommendations for CREATE/DROP
  INDEX with one-click apply
- Data Snapshots: export selected tables to JSON (FK-ordered), restore from
  file with optional truncate in a transaction

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/tauri.ts

@@ -35,6 +35,15 @@ import type {
   TuskContainer,
   AppSettings,
   McpStatus,
+  ValidationRule,
+  GenerateDataParams,
+  GeneratedDataPreview,
+  DataGenProgress,
+  IndexAdvisorReport,
+  SnapshotMetadata,
+  CreateSnapshotParams,
+  RestoreSnapshotParams,
+  SnapshotProgress,
 } from "@/types";
 
 // Connections
@@ -334,3 +343,50 @@ export const saveAppSettings = (settings: AppSettings) =>
 
 export const getMcpStatus = () =>
   invoke<McpStatus>("get_mcp_status");
+
+// Validation (Wave 1)
+export const generateValidationSql = (connectionId: string, ruleDescription: string) =>
+  invoke<string>("generate_validation_sql", { connectionId, ruleDescription });
+
+export const runValidationRule = (connectionId: string, sql: string, sampleLimit?: number) =>
+  invoke<ValidationRule>("run_validation_rule", { connectionId, sql, sampleLimit });
+
+export const suggestValidationRules = (connectionId: string) =>
+  invoke<string[]>("suggest_validation_rules", { connectionId });
+
+// Data Generator (Wave 2)
+export const generateTestDataPreview = (params: GenerateDataParams, genId: string) =>
+  invoke<GeneratedDataPreview>("generate_test_data_preview", { params, genId });
+
+export const insertGeneratedData = (connectionId: string, preview: GeneratedDataPreview) =>
+  invoke<number>("insert_generated_data", { connectionId, preview });
+
+export const onDataGenProgress = (
+  callback: (p: DataGenProgress) => void
+): Promise<UnlistenFn> =>
+  listen<DataGenProgress>("datagen-progress", (e) => callback(e.payload));
+
+// Index Advisor (Wave 3A)
+export const getIndexAdvisorReport = (connectionId: string) =>
+  invoke<IndexAdvisorReport>("get_index_advisor_report", { connectionId });
+
+export const applyIndexRecommendation = (connectionId: string, ddl: string) =>
+  invoke<void>("apply_index_recommendation", { connectionId, ddl });
+
+// Snapshots (Wave 3B)
+export const createSnapshot = (params: CreateSnapshotParams, snapshotId: string, filePath: string) =>
+  invoke<SnapshotMetadata>("create_snapshot", { params, snapshotId, filePath });
+
+export const restoreSnapshot = (params: RestoreSnapshotParams, snapshotId: string) =>
+  invoke<number>("restore_snapshot", { params, snapshotId });
+
+export const listSnapshots = () =>
+  invoke<SnapshotMetadata[]>("list_snapshots");
+
+export const readSnapshotMetadata = (filePath: string) =>
+  invoke<SnapshotMetadata>("read_snapshot_metadata", { filePath });
+
+export const onSnapshotProgress = (
+  callback: (p: SnapshotProgress) => void
+): Promise<UnlistenFn> =>
+  listen<SnapshotProgress>("snapshot-progress", (e) => callback(e.payload));