feat: ER Diagram visualization for PostgreSQL, MySQL, SQLite

.github/workflows/beta.yml

@@ -183,6 +183,8 @@ jobs:
 
       - name: Build app
         env:
+          CARGO_PROFILE_RELEASE_LTO: "off"
+          CARGO_PROFILE_RELEASE_CODEGEN_UNITS: "256"
           TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
           TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
         run: npm run tauri build -- --target ${{ matrix.target }}

CHANGELOG.md

@@ -27,13 +27,24 @@ All notable changes to QueryDen are documented here. This project adheres to [Se
 - **Create Login Role / Drop Role now throw on disconnected state.** Instead of silently returning when `activeConnection` or `currentDb` is null, both operations throw a clear "Not connected to a database" error shown in the dialog.
 - **Dialog no longer steals focus from input fields on parent re-render.** The `Dialog` component's auto-focus effect was split into two: focus management depends only on `[open, initialFocusRef]`, and the Escape key listener depends on `[open, dismissOnEsc, onClose]`. This prevents inline `onClose` callbacks from re-triggering the focus effect and jumping the cursor back to the initial element.
 - **PostgreSQL `regrole` type no longer logs decode warnings.** Added a `"regrole"` decode arm to the patched `tauri-plugin-sql` PostgreSQL decoder (lowercase match, matching the driver's runtime type name), silently handling regrole values from catalog queries like tablespace owner resolution.
+- **Auto-save now updates `originalQuery` on write.** When auto-save persists a tab's text to disk, the tab's `originalQuery` is updated to match, preventing a spurious "unsaved changes" prompt on close when auto-save already captured the content. Tabs whose auto-save write failed retain their previous dirty state.
+- **Session restore handles null `originalQuery` from existing session files.** The session restore code now reads `t.originalQuery ?? t.query ?? ""`, a migration path for session files written before `originalQuery` was tracked (where the Rust `Option<String>` serializes to JSON `null`). Prevents a false "unsaved changes" prompt on every launch for users upgrading from versions before this field was introduced.
+- **"Discard" on close now overwrites session with clean state.** When the user clicks "Discard" in the unsaved-changes prompt, the session file is immediately re-saved with `originalQuery = query` for every tab, so the close prompt doesn't re-fire on next startup.
+- **PostgreSQL FK relationships now render in the ER diagram.** The `schemaItems.foreignKeys` list is sometimes null when schema loading fails silently. Added direct `fetchPostgresForeignKeys()` and `fetchMySQLForeignKeys()` fallbacks that query system catalogs directly, plus a `normalizeTableName()` helper to reconcile the `public.` prefix format difference between PostgreSQL's `regclass::text` and the schema items table list.
+- **PostgreSQL columns in `public` schema no longer missing from the ER diagram.** Tables with many columns were showing as header-only because the column map keyed by `public.tablename` didn't match the schema items' bare `tablename` format. Stripping the `public.` prefix in the column lookup fixed it.
+- **ER diagram no longer freezes when opening on databases with many tables.** The table selector dialog now appears first — users pick which tables to include before any schema data is fetched or dagre layout runs. Selected-only data keeps both the query batch and the layout computation scoped to what's visible.
+
+### Changed
+- **ER diagram compact view is now the default.** The diagram opens in compact mode (PK/FK columns only) instead of showing all columns, reducing visual clutter on first open. Users can toggle back to full-column view via the toolbar button.
 
 ### Added
 - **[#67](https://github.com/openidle-dev/queryden/issues/67) — Master key storage status surfaced in Help → About.** A new "Master Key" info card in the About dialog shows whether the encryption key is stored in the OS keyring, a local file fallback, or is unavailable. When the file fallback is in use, a warning explains how to install a keyring service for OS-level protection.
 - **[#139](https://github.com/openidle-dev/queryden/issues/139) — Ctrl+PageUp / Ctrl+PageDown now cycles between query editor tabs.** Tab cycling works globally like a DataGrip preset keybinding. Both bindings appear in Settings → Keymap and respect custom rebinding.
 - **[#122](https://github.com/openidle-dev/queryden/issues/122) — Auto-save: open query text is periodically written to `.sql` files on disk.** When enabled in Settings → Auto Save, each tab's current text is debounced and saved to `<appDataDir>/auto-save/` with the naming convention `{connectionFolder}_{database}_{tabId}.sql`. Files are recoverable from the app data directory and can be backed up like any other `.sql` file. Save interval is configurable (5–300 seconds).
 - **pgAdmin-style login/group role management.** Right-click the "Login Roles" folder in the PostgreSQL tree to create a new role via dedicated dialog (name, password, connection limit, valid until, privilege checkboxes). Right-click any role leaf node to drop it with a confirmation prompt. Both operations refresh the tree immediately. Login roles are exposed in the tree with a green User icon; group roles with a blue Users icon.
 - **PostgreSQL operators enabled by default in schema tree.** The `showOperators` setting now defaults to `true`, so operator nodes appear in the schema tree without having to toggle the setting first.
+- **ER Diagram visualization for PostgreSQL, MySQL/MariaDB, and SQLite.** A new ER Diagram dialog (toolbar <Table /> button) renders the current database as an interactive entity-relationship diagram powered by `@xyflow/react` v12 and `dagre` auto-layout. Tables are shown as cards with PK (key icon) and FK (link icon) column markers; relationships are drawn as smooth-step edges with cardinality labels (`*` at the FK end, `1` at the PK end). The dialog opens with a table selector so users pick which tables to include — preventing the freeze that would occur when auto-introspecting many tables. A toolbar provides schema multi-select (PostgreSQL), search/filter with related-table expansion, compact/PK-only column mode, refresh, and SVG export (Tauri `save()` dialog + `writeTextFile`). Schema data is cached with a 30-second TTL so re-opening the same tables is instant. Provider-specific introspection: PostgreSQL queries `pg_attribute`/`pg_index`/`pg_constraint` in bulk, MySQL uses `information_schema`, SQLite uses batched `PRAGMA table_info`/`PRAGMA foreign_key_list` via `Promise.all`.
+- **ER Diagram now opens on the correct database.** Previously the diagram always read the global `activeConnection` — if the active editor tab targeted a different database, the diagram showed the wrong schema. The toolbar button now switches the connection to match the tab's target before opening.
 
 
 ## [1.0.23] - 2026-05-26

package.json

@@ -43,7 +43,9 @@
     "@tauri-apps/plugin-process": "^2",
     "@tauri-apps/plugin-sql": "^2",
     "@tauri-apps/plugin-updater": "^2",
+    "@xyflow/react": "^12.10.2",
     "clsx": "^2.1.1",
+    "dagre": "^0.8.5",
     "lucide-react": "^0.469.0",
     "monaco-editor": "^0.55.0",
     "react": "^18.3.1",
@@ -59,6 +61,7 @@
   "devDependencies": {
     "@tailwindcss/vite": "^4.0.0",
     "@tauri-apps/cli": "^2",
+    "@types/dagre": "^0.7.54",
     "@types/react": "^18.3.0",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.0",

src-tauri/.cargo/config.toml

@@ -1,2 +1,7 @@
 # Let cargo-xwin handle the linker and libraries automatically
 # Static CRT (+crt-static) can sometimes cause linker errors during cross-compilation
+
+# Use LLVM's lld-link on Windows for faster linking than MSVC link.exe.
+# rust-lld ships with the Rust toolchain — no extra install needed.
+[target.x86_64-pc-windows-msvc]
+linker = "rust-lld"