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/db/entities.go

@@ -269,12 +269,8 @@ func (s *Store) List(params ListParams) ([]*Entity, error) {
 		entities = append(entities, e)
 	}
 
-	for _, e := range entities {
-		tags, err := s.loadTags(e.ID)
-		if err != nil {
-			return nil, err
-		}
-		e.Tags = tags
+	if err := s.batchLoadTags(entities); err != nil {
+		return nil, err
 	}
 
 	return entities, nil
@@ -452,6 +448,44 @@ func (s *Store) Resolve(prefix string) (string, error) {
 
 // helpers
 
+func (s *Store) batchLoadTags(entities []*Entity) error {
+	if len(entities) == 0 {
+		return nil
+	}
+
+	idMap := make(map[string]*Entity, len(entities))
+	placeholders := make([]string, len(entities))
+	args := make([]any, len(entities))
+	for i, e := range entities {
+		e.Tags = []string{}
+		idMap[e.ID] = e
+		placeholders[i] = "?"
+		args[i] = e.ID
+	}
+
+	query := fmt.Sprintf(
+		"SELECT entity_id, tag FROM entity_tags WHERE entity_id IN (%s) ORDER BY entity_id, tag",
+		strings.Join(placeholders, ","),
+	)
+
+	rows, err := s.db.Query(query, args...)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var entityID, tag string
+		if err := rows.Scan(&entityID, &tag); err != nil {
+			return err
+		}
+		if e, ok := idMap[entityID]; ok {
+			e.Tags = append(e.Tags, tag)
+		}
+	}
+	return rows.Err()
+}
+
 func (s *Store) loadTags(entityID string) ([]string, error) {
 	rows, err := s.db.Query("SELECT tag FROM entity_tags WHERE entity_id = ? ORDER BY tag", entityID)
 	if err != nil {