Add backlink context extraction (0.4.0)

- Bidirectional link traversal: discover notes that link TO discovered notes
- Header section extraction for backlinks (not full content)
- "Include backlinks" toggle (enabled by default)
- Visual "← backlink" badge in selection modal
- Output prefixes: "# Note:" for forward links, "# Backlink:" for backlinks
- Deduplicate snippets when multiple links in same section

manifest.json

@@ -1,7 +1,7 @@
 {
 	"id": "openaugi",
 	"name": "OpenAugi",
-	"version": "0.3.1",
+	"version": "0.4.0",
 	"minAppVersion": "1.8.9",
 	"description": "Process information faster with augmented intelligence (AI for thinkers). Parse your voice notes into atomic notes, tasks, and summaries. Grab context from dataview queries and linked notes. De-duplicate and merge atomic ideas into a clean, organized vault.",
 	"author": "Chris Lettieri",

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "open-augi",
-	"version": "0.3.1",
+	"version": "0.4.0",
 	"description": "",
 	"main": "main.js",
 	"scripts": {