feat: Complete Implementation of Sqlite Database and enhance documentation and tests

[Yashh56]

This pull request introduces full support for SQLite databases across the application, including connection management, schema discovery, CRUD operations, and migrations. It also adds the better-sqlite3 package and updates documentation to reflect the new capabilities. The most important changes are grouped below:

SQLite Database Support

• Added full SQLite support to the tech stack and documentation, including connection via local file picker, schema explorer, ER diagrams, query builder, migrations, and CRUD operations. (FEATURES.md) [1] [2] [3] [4] [5] [6]
• Updated handlers to support SQLite for database operations, migrations, queries, primary key listing, and table creation. (databaseHandlers.ts, migrationHandlers.ts, queryHandlers.ts) [1] [2] [3] [4] [5] [6]

Testing and Connection Builder

• Added tests for SQLite connection building, including path and read-only mode handling. (connectionBuilder.test.ts) [1] [2]

Dependency Management

• Added better-sqlite3 and its type definitions to dependencies and lock files. (package.json, pnpm-lock.yaml) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

Documentation Updates

• Updated feature documentation to include SQLite-specific features, engine colors, and new supported database section. (FEATURES.md) [1] [2]
• Updated last updated date in documentation. (FEATURES.md)

[Copilot]

Pull request overview

This PR adds end-to-end SQLite support across the RelWave UI and bridge layer (connector, queries, handlers), along with tests and documentation updates to reflect the expanded database support.

Changes:

• Add SQLite database type support in the frontend (connection UX, schema explorer selection handling, engine colors).
• Implement a new SQLite bridge connector using better-sqlite3 plus SQLite-specific query helpers and handler wiring.
• Add SQLite-focused tests and update docs/CI notes to cover the new capability.

Reviewed changes

Copilot reviewed 43 out of 44 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
src/types/database.ts	Adds sqlite to supported types and relaxes connection params for file-based configs.
src/services/bridgeApi.ts	Updates client-side required-field validation to allow SQLite connections.
src/pages/Index.tsx	Uses SQLite-specific required fields and adjusts payload defaults (port/sslmode).
src/lib/parseConnectionUrl.ts	Adds sqlite:// parsing + SQLite URL building support.
src/components/schema-explorer/TreeViewPanel.tsx	Changes selection key delimiter to ::: to avoid ambiguity/collisions.
src/components/schema-explorer/SchemaExplorerPanel.tsx	Updates selection parsing to match the new ::: delimiter.
src/components/schema-explorer/MetaDataPanel.tsx	Updates selection parsing to match the new ::: delimiter.
src/components/project/ProjectList.tsx	Adds an engine color mapping for SQLite.
src/components/project/ProjectDetailView.tsx	Adds an engine color mapping for SQLite.
src/components/project/ImportProjectDialog.tsx	Adds SQLite option + file picker UX and skips host/port/user/ssl where applicable.
src/components/home/types.ts	Adds SQLITE_REQUIRED_FIELDS constant.
src/components/home/WelcomeView.tsx	Generalizes DB type color handling and adds SQLite colors.
src/components/home/DiscoveredDatabasesCard.tsx	Adds SQLite color styling.
src/components/home/DatabaseDetail.tsx	Updates connection detail rendering for SQLite (file path vs host/port/user).
src/components/home/ConnectionList.tsx	Displays SQLite DB path instead of host for list items.
src/components/home/AddConnectionDialog.tsx	Adds SQLite option + file picker and disables URL tab for SQLite.
bridge/src/utils/migrationGenerator.ts	Allows sqlite as a migration generation DB type.
bridge/src/utils/dbTypeDetector.ts	Detects SQLite database type strings.
bridge/src/types/sqlite.ts	Introduces SQLite-specific config + metadata + DDL operation types.
bridge/src/types/index.ts	Exports SQLite types and adds DBType.SQLITE.
bridge/src/services/queryExecutor.ts	Wires SQLite connector into executor operations and schema aggregation.
bridge/src/services/databaseService.ts	Adjusts required-field validation for SQLite connections.
bridge/src/services/connectionBuilder.ts	Builds SQLite connection objects (path/readonly) in addition to server DB configs.
bridge/src/queries/sqlite/tables.ts	Adds SQLite PRAGMA constants for table metadata queries.
bridge/src/queries/sqlite/stats.ts	Adds SQLite stats query constants and PRAGMA keys.
bridge/src/queries/sqlite/schema.ts	Adds SQLite schema/table listing queries.
bridge/src/queries/sqlite/migrations.ts	Adds SQLite migration table and migration bookkeeping queries.
bridge/src/queries/sqlite/index.ts	Central export for SQLite query helpers.
bridge/src/queries/sqlite/crud.ts	Adds SQLite CRUD query builders and safe identifier quoting.
bridge/src/queries/sqlite/constraints.ts	Adds query for pulling CREATE TABLE SQL for check-constraint parsing.
bridge/src/queries/index.ts	Re-exports SQLite queries from the main query index.
bridge/src/handlers/statsHandlers.ts	Adds SQLite stats normalization to the handler response format.
bridge/src/handlers/queryHandlers.ts	Adds SQLite branches for table data, PK listing, DDL, and CRUD operations.
bridge/src/handlers/migrationHandlers.ts	Adds SQLite branches for apply/rollback migration operations.
bridge/src/handlers/databaseHandlers.ts	Adds SQLite type normalization for incoming connections.
bridge/src/connectors/sqlite.ts	Adds a full SQLite connector implementation (metadata, CRUD, migrations, caching).
bridge/pnpm-workspace.yaml	Adjusts pnpm build-script allow/deny lists for dependencies.
bridge/pnpm-lock.yaml	Adds better-sqlite3 and related dependency graph entries.
bridge/package.json	Adds better-sqlite3 + types as dependencies.
bridge/tests/connectors/sqlite.test.ts	Adds integration-style tests for SQLite connector behavior.
bridge/tests/connectors/sqlite.cache.test.ts	Adds unit tests for the SQLite cache manager behavior.
bridge/tests/connectionBuilder.test.ts	Adds tests for SQLite connection building behavior.
FEATURES.md	Documents SQLite support, feature matrix, and updates metadata.
.github/workflows/test.yml	Adds clarifying CI comments for SQLite tests and native module build expectations.

Files not reviewed (1)

• bridge/pnpm-lock.yaml: Language not supported

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