feat: various UI fixes, prompt optimizations, and allowing duplicate docs

- Updated `content_hash` in the `Document` model to remove global uniqueness, allowing identical content across different paths.
- Enhanced `_create_document` function to handle path uniqueness and prevent session-poisoning from `IntegrityError`.
- Added detailed comments for clarity on the changes and their implications.
- Introduced new citation handling in the editor for improved user experience with citation jumps.
- Updated package dependencies in the frontend for better functionality.

surfsense_web/components/ui/search-highlight-node.tsx

@@ -0,0 +1,45 @@
+"use client";
+
+import type { PlateLeafProps } from "platejs/react";
+import { PlateLeaf } from "platejs/react";
+
+/**
+ * Stable class name used to identify Plate-rendered citation highlight
+ * leaves in the DOM. We can't use a `data-*` attribute here — Plate's
+ * `PlateLeaf` runs its props through `useNodeAttributes`, which only
+ * forwards `attributes`, `className`, `ref`, and `style` to the rendered
+ * element; arbitrary `data-*` props are silently dropped (verified
+ * against `@platejs/core/dist/react/index.js` v52). So `className` is
+ * the only escape hatch that's guaranteed to survive into the DOM.
+ */
+export const CITATION_HIGHLIGHT_CLASS = "citation-highlight-leaf";
+
+/**
+ * Leaf rendered for ranges decorated by `@platejs/find-replace`'s
+ * `FindReplacePlugin`. We re-purpose that plugin to drive the citation-jump
+ * highlight: when a citation is staged, the parent sets the plugin's `search`
+ * option to a snippet of the chunk text and Plate decorates every match with
+ * `searchHighlight: true`. This component renders those decorations as a
+ * `<mark>` tagged with `CITATION_HIGHLIGHT_CLASS` so the parent can:
+ *   1. Query the first match in DOM order to scroll it into view.
+ *   2. Detect the active-highlight state without a separate React ref.
+ *
+ * The highlight is **persistent** — it does not auto-fade. The parent in
+ * `EditorPanelContent` clears it by setting the plugin's `search` option
+ * back to "" when one of: (a) the user clicks anywhere inside the editor,
+ * (b) the panel switches to a different document, (c) the user toggles
+ * into edit mode, (d) another citation jump is staged, (e) the panel
+ * unmounts. We use a brief entrance pulse (`citation-flash-in`, see
+ * `globals.css`) purely to draw the eye after `scrollIntoView` lands.
+ */
+export function SearchHighlightLeaf(props: PlateLeafProps) {
+	return (
+		<PlateLeaf
+			{...props}
+			as="mark"
+			className={`${CITATION_HIGHLIGHT_CLASS} bg-primary/15 ring-1 ring-primary/40 rounded-sm px-0.5 text-inherit animate-[citation-flash-in_400ms_ease-out]`}
+		>
+			{props.children}
+		</PlateLeaf>
+	);
+}