i18n(sv): address review (export buttons, singular, consistent terms)

- EXP. {slot} and EXPORT so the Recent Imagery export buttons fit and A
  and B read apart; EXPORT listed as same-as-English.
- {count} HÖRT / hört for one aircraft; the plural rule in sv.md no
  longer lists HÖRDA.
- INTE FARA ÖVER throughout; VÄ/HÖ for left/right (V is west on the
  compass); STYRD KURS vs KURS Ö. GRUND; MIK in the first-run tip.
- Label-first counts for sightings and standby cameras; neuter audio
  states; OSÄKER on chip and status line; KN for knots; the ellipsis
  character; Ladda ned and VÄNTLÄGE throughout; Olagligt ingripande;
  FÖRHANDSVY for the preview flag and authoring heading.
- sv.json in the format scope; Swedish in language-code order in
  TRANSLATORS.md; glossary row reduced to incident → händelse; 29
  letterless entries dropped from same-as-english.json.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

docs/translations/sv.md

@@ -32,7 +32,7 @@ A `tn()` entry needs two forms. `Intl.PluralRules('sv')` picks:
 | `one`   | 1                           | 1 kamera    |
 | `other` | everything else: 0, 2, 1,5… | 3 kameror   |
 
-Abbreviated units and codes do not change: «{count} MEDD.», «{count} HÖRDA».
+Abbreviated units and codes do not change: «{count} MEDD.».
 
 ## Glossary
 
@@ -81,4 +81,4 @@ Abbreviated units and codes do not change: «{count} MEDD.», «{count} HÖRDA»
 | click / tap / press a key                      | klicka / tryck / tryck på tangenten                             |
 | card / label (on the map) / clear (layers)     | kort / etikett / stäng av                                       |
 | frame (weather, video) / image                 | bildruta / bild                                                 |
-| road condition / incident / roadwork           | väglag / händelse / vägarbete                                   |
+| incident                                       | händelse                                                        |