fix: batch tag queries, inline edit, delete response, SPA catch-all, link glyph

- Fix N+1 tag query in List() with batched IN clause
- Add inline body editing in web detail pane (dblclick or e key)
- Delete API returns {result: "soft"|"hard"} with 200 instead of 204
- SPA handler serves index.html for all extensionless paths
- Link glyph changed from emoji 🔗 to unicode ↗ for terminal alignment
- Capture bar contrast and hover glow increased
- Comment on load-bearing "--" in root.go

internal/display/glyph.go

@@ -13,7 +13,7 @@ var cardGlyphMap = map[db.CardType]string{
 	db.CardTemplate:  "◈",
 	db.CardChecklist: "☐",
 	db.CardDecision:  "⚖",
-	db.CardLink:      "🔗",
+	db.CardLink:      "↗",
 }
 
 func DisplayGlyph(glyph db.Glyph, cardType *db.CardType) string {