Model graph: the whole model as one graph with queries; 0.9.0

- Model | Graph switch on main.archify (Diagram | Graph on diagram pages, narrowed to that diagram)
- union graph of every element and connection, registry and inline, built from the model index
- query box: text, type:, diagram:, decision:, uses:, near:, from: to:, unused, shared, -shared
- side panel per element and connection with diagrams, registry line and decisions one click away
- legend chips, Fit, Layout, Labels, Export PNG; Cytoscape.js bundled as dist/graph.js
- command Archify | Open Model Graph; integration check; unit tests for graph and queries

README.md

@@ -65,6 +65,7 @@ The Archify CLI and the AI agents that use it write diagrams as JSON, named `nam
 
 - **New diagram from a template**: *Archify | New Diagram…* creates a starter `.archify` file for any of the five diagram kinds, or an everyday plan, in the chosen folder.
 - **New model from an example**: *Archify | New Model…* creates a complete model folder from a C4 example (Standard Web App, E-Shop, Event-Based Integration).
+- **Model graph**: the **Graph** switch on any page of a model shows the whole model as one graph, with a query box (`type:database`, `uses:api`, `from:web to:db`, …), a side panel per element and PNG export. See [Models](#models).
 - **Diagram editor**: `.archify` files open as the rendered diagram. **Show Source** opens the YAML beside it, and edits re-render live.
 - **Live updates**: the diagram re-renders as you edit, and keeps the focus and route you selected (`#focus=…`, `#route=…`).
 - **HTML viewer**: right-click a rendered `.html` file and choose **Archify | Open in HTML Viewer**, or use *Reopen Editor With… → Archify HTML Viewer*. For Archify HTML already open as text, a button appears in the editor title. The viewer reloads when the file changes on disk.
@@ -73,7 +74,7 @@ The Archify CLI and the AI agents that use it write diagrams as JSON, named `nam
 - **Schema help**: completion and hover from Archify's own schemas, through the YAML extension for `.archify` files.
 - **Source links**: in source-backed diagrams, clicking a source reference opens that file and line range in the editor. If the file is not in the workspace, the web link opens instead.
 - **Export**: the diagram's own Export menu (PNG, SVG, share card, …) saves through a VS Code save dialog.
-- **Commands**: *Archify | New Model…*, *Archify | New Registry…*, *Archify | New Diagram…*, *Archify | New Decision…*, *Archify | Open Model*, *Archify | Render to HTML File…*, *Archify | Open in Browser*, *Archify | Refresh Preview*, *Archify | Show Source*.
+- **Commands**: *Archify | New Model…*, *Archify | New Registry…*, *Archify | New Diagram…*, *Archify | New Decision…*, *Archify | Open Model*, *Archify | Open Model Graph*, *Archify | Render to HTML File…*, *Archify | Open in Browser*, *Archify | Refresh Preview*, *Archify | Show Source*.
 
 ## 3D view
 
@@ -126,7 +127,10 @@ online-shop/
 - **Registry view.** A `.archify-registry` file opens as its elements, as cards. Click one and a dialog shows its description, where it is defined and the diagrams that use it; click a diagram to open it. **Show Source** opens the YAML beside it.
 - **Elements and Connectors.** Under every diagram, Archify's node index is titled **Elements**, and a **Connectors** panel next to it lists every connection as "from → to" with its label. Hovering highlights the connector in the diagram; clicking keeps it highlighted and scrolls to it.
 - **Starting one.** *Archify | New Model…* (right-click a folder) copies one of the shipped examples into a new folder, named as you choose: **C4 - Standard Web App** (single-page app, API, database, cache, storage, identity provider), **C4 - E-Shop** (web shop, API, worker, queue, payment and email providers) or **C4 - Event-Based Integration** (event bus, router, dead-letter queue, event store, consumers). Each has a registry and context, container and component diagrams. For an empty model, *Archify | New Diagram… → Model* creates just a `main.archify`.
-- **Commands.** *Archify | Open Model* opens the model page of the current file, from the editor title, the Command Palette or the Explorer menu of a `.archify` or `.archify-registry` file.
+- **The graph.** The **Model | Graph** switch at the top of the `main.archify` page (next to **Export** when the file has a diagram) replaces the page with the whole model as one graph: every element any diagram draws plus every registry element, every connection between them, each once. Registry elements have a solid border, inline ones a dashed border; colours are Archify's type colours and the legend chips at the bottom hide or show a type. Drag nodes, scroll to zoom, **Fit** (or <kbd>0</kbd>) frames what matches, **Layout** lays it out again, **Labels** toggles connection labels, **Export PNG** saves the picture. On a diagram page the switch reads **Diagram | Graph** and opens the graph already narrowed to that diagram. *Archify | Open Model Graph* does the same from the Command Palette or Explorer.
+- **Queries.** Type a few words in the box (<kbd>/</kbd> focuses it); matches stay bright, the rest dims, the count shows "9 of 14 elements". Terms combine with AND and a leading `-` excludes: `database` (id, label, sublabel, brand or type contain it), `type:backend`, `diagram:0200-*` (what those diagrams draw), `decision:<id>` (what a decision is about or is attached to), `uses:api` (an element and its neighbours), `near:api,2` (within two steps), `from:web to:db` (the shortest path, following the arrows first), `unused` (registry elements no diagram draws), `shared` and `-shared` (registry or inline elements only). The **?** button lists them; clicking an example runs it.
+- **Side panel.** Click an element for its description, type, where it is defined (**Registry** opens the file at the line), the diagrams that draw it (click to open), its connections and its decisions (click to open). **Neighbours** runs `uses:` for it. Click a connection for its labels, the diagrams that draw it and its decisions.
+- **Commands.** *Archify | Open Model* opens the model page of the current file, from the editor title, the Command Palette or the Explorer menu of a `.archify` or `.archify-registry` file; *Archify | Open Model Graph* opens the graph.
 
 Formats in detail: [docs/model.md](docs/model.md). A full example: [examples/online-shop](examples/online-shop).