Expand snippet pool with more code and add lore/flavor text

8 more entries (16 total, up from 8): three more code snippets across
delve-term/stash/goonk for variety, plus five real lore/flavor text
fragments -- two from adventure's Chronicle of the Keepers (English)
and three from djupet's event log (Swedish, on purpose -- genuinely
different character set, and it's real shipped content, not filler).

Added a `type` field (code/lore) to every entry for future use (could
filter by type later) and updated the header/help-modal copy to stop
saying "code" exclusively now that it isn't.

Verified via simulated typing: a full Swedish snippet (öäå included)
types and finishes correctly with 100% accuracy, and a lore snippet
renders and completes the same as any code one.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -31,7 +31,16 @@ want them pleasant to type.
 
 ## Local development
 
-Any static file server works, e.g.:
+Run with npm:
+
+```bash
+npm install
+npm run dev
+```
+
+This serves the app on `http://localhost:8850`.
+
+Any static file server still works, e.g.:
 
 ```bash
 python3 -m http.server 8850