0.1.8 (6/12) — split view, a redesigned source reader, and workspace links

##### New
- **Split view** — open a source beside your draft and work them side by side. Enter from the palette ("Open source beside draft…"), the source tree's "Open to the side", ⌘-click on an evidence row, or ⌘\. A focused-pane model drives the right panel, chat lens, and editor shortcuts, and the split is restored when you reopen the workspace.
- **Redesigned source reader** — a cleaner reader header and body, interactive trays for comments and highlights, smoother zoom and navigation, and unified highlight navigation across both markdown and PDF.
- **Workspace links** — link to any document, source, annotation, or bit from inside your draft (`clide://` links, inserted from the editor toolbar). Clicking jumps to the target; exports resolve them to readable references.
- **Selection chips in chat** — pull selected passages into the chat composer as chips you can carry alongside your prompt, with copy/paste support.
- **Mark AI annotations useful** — give an AI-authored annotation a thumbs-up to keep it as useful, distinct from accept/dismiss. Authorship is preserved and the proposed-triage state clears.

##### Improvements
- **Live remote changes** — when a synced edit lands from another device, open documents reload in place when clean and flag a conflict when dirty, with coalesced refreshes across stores.
- **Smoother typing in long documents** — reduced render churn and added latency guards on the editor's keystroke path.
- **Richer research briefs** — linked sources now carry a `cited_in_documents` rollup (every passage that cites them), surfaced to agents through the MCP research brief.
- Pixel-square loaders across the app, polished document and split transitions, redesigned source and document headers, provider-safe effort controls, and assorted reader/annotation navigation fixes (including iPad PDF).

##### Under the hood
- **clide-mcp** — the MCP server is renamed from `@ideate/mcp` to `clide-mcp` and published (0.4.0) as a self-contained esbuild bundle. `list_tasks` and `list_resolved_annotations` join the hosted read surface.
- Hardened the iOS simulator dev setup; retired the sidebar sync-status indicator and the editor-header undo/redo controls in favor of the new chrome.