refactor(transactions): drop the Q1-Q4 chips from the period filter (#1579)

The quarter chips (#1545) appeared only once a rakenskapsar was chosen,
pushed the filter row out of alignment, and on a brutet rakenskapsar
they were fiscal-year quarters rather than momsdeklaration quarters, so
they misled more than they scoped. The rakenskapsar filter itself (the
user-requested half) stays; lib/transactions/period-filter.ts keeps its
quarter helpers and tests since resolvePeriodBounds still serves the
full-year bounds.

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

messages/en.json

@@ -5274,7 +5274,6 @@
     "no_search_results": "No transactions match your search.",
     "source_empty": "The selected source has no transactions. Choose All to show the other sources.",
     "period_empty": "The selected period has no transactions. Choose All fiscal years to show everything.",
-    "period_quarter_group": "Quarter of the fiscal year (not calendar quarter)",
     "period_pending_outside": "{count, plural, one {# transaction to record outside the selected period.} other {# transactions to record outside the selected period.}}",
     "period_show_all": "Show all",
     "skv_reconnect_title": "The Skatteverket connection needs to be renewed",

messages/sv.json

@@ -5274,7 +5274,6 @@
     "no_search_results": "Inga transaktioner matchar din sökning.",
     "source_empty": "Den valda källan har inga transaktioner. Välj Alla för att visa övriga källor.",
     "period_empty": "Den valda perioden har inga transaktioner. Välj Alla räkenskapsår för att visa allt.",
-    "period_quarter_group": "Räkenskapsårets kvartal (inte kalenderkvartal)",
     "period_pending_outside": "{count, plural, one {# transaktion att bokföra utanför vald period.} other {# transaktioner att bokföra utanför vald period.}}",
     "period_show_all": "Visa alla",
     "skv_reconnect_title": "Anslutningen till Skatteverket behöver förnyas",