opencode prices and Go limits, settings out of .env

- Fetch prices for opencode (Zen and Go) incl. limits, image input, reasoning,
  long-context tiers and peak-hour/date factors; costs apply them per request
- Record the cost opencode reports per response; track Go allowance in 5h/7d/month
  windows against a provider plan limit (budget table, status overlay)
- Settings → Config file: move values of ${NAME} references into the config
- Examples, presets and forms keep keys in the config instead of .env

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/i18n/de.ts

@@ -40,6 +40,13 @@ export const de: Messages = {
   "settings.imagesDefault": "Standardmodell",
   "settings.imagesDir": "Ordner im Projekt",
   "settings.imagesHint": "Modelle und Preise pro Bild werden in der Config-Datei bearbeitet ([images]).",
+  "budget.plan": "Go-Plan ({v}/Monat)",
+  "budget.window.5h": "5 Stunden",
+  "budget.window.week": "7 Tage",
+  "budget.window.month": "Monat",
+  "settings.planLimit": "Planlimit (USD/Monat)",
+  "settings.planLimitHint": "opencode Go: das monatliche Nutzungslimit deines Plans. CodeCraft zählt den Verbrauch, den jede Antwort meldet (5 Stunden 20 %, Woche 50 %, Monat 100 %) – nur Nutzung über CodeCraft.",
+  "status.plan": "Go {pct} ({window})",
   "budget.title": "Budgets in diesem Monat",
   "budget.spent": "Verbraucht",
   "budget.budget": "Budget",
@@ -58,6 +65,12 @@ export const de: Messages = {
   "settings.budgetWarning": "Warnen ab",
   "settings.adminKey": "Admin-Key (optional)",
   "settings.adminKeyHint": "Anthropic Admin-API-Key (sk-ant-admin01-…), um die echten, organisationsweiten Monatskosten anzuzeigen.",
+  "settings.envTitle": "Einstellungen aus Umgebungsvariablen",
+  "settings.envHint": "Diese ${NAME}-Verweise holen ihre Werte aus der Server-Umgebung (.env). Übernimm die Werte in die Konfiguration, damit alles hier eingestellt ist – danach können die Variablen aus der .env raus.",
+  "settings.envApply": "In die Konfiguration übernehmen",
+  "settings.envConfirm": "Die aktuellen Werte von {names} in die Konfigurationsdatei schreiben? Die Keys liegen dann in der Config (und in ihren Backups) statt in der Umgebung.",
+  "settings.envDone": "{n} Werte in die Konfiguration übernommen. Du kannst sie jetzt aus der .env entfernen.",
+  "settings.envUnset": "Verwendet, aber nicht gesetzt (bleiben unverändert):",
   "settings.fetchPrices": "Preise abrufen",
   "settings.pricesFetched": "Preise für {n} Modelle aktualisiert – zum Übernehmen speichern.",
   "stats.perMillion": "pro 1 Mio. Tok.",
@@ -647,7 +660,7 @@ export const de: Messages = {
   "settings.baseUrl": "Basis-URL",
   "settings.apiKey": "API-Key",
   "settings.apiKeyStored": "Gespeichert – leer lassen zum Beibehalten",
-  "settings.apiKeyHint": "Am besten ${ENV_VAR}-Verweise nutzen; direkte Keys stehen im Klartext in der Config-Datei.",
+  "settings.apiKeyHint": "Wird in der Konfigurationsdatei gespeichert (für Admins lesbar, in Backups enthalten). ${NAME}-Verweise auf Umgebungsvariablen funktionieren weiterhin.",
   "settings.authPrefix": "Auth-Präfix",
   "settings.enabled": "Aktiv",
   "settings.modelCount": "{n} Modelle",

web/src/i18n/en.ts

@@ -39,6 +39,13 @@ export const en = {
   "settings.imagesDefault": "Default model",
   "settings.imagesDir": "Folder in the project",
   "settings.imagesHint": "Models and prices per image are edited in the config file ([images]).",
+  "budget.plan": "Go plan ({v}/month)",
+  "budget.window.5h": "5 hours",
+  "budget.window.week": "7 days",
+  "budget.window.month": "Month",
+  "settings.planLimit": "Plan limit (USD/month)",
+  "settings.planLimitHint": "opencode Go: the monthly usage limit of your plan. CodeCraft tracks the allowance each response reports (5 hours 20 %, week 50 %, month 100 %) – only usage through CodeCraft.",
+  "status.plan": "Go {pct} ({window})",
   "budget.title": "Budgets this month",
   "budget.spent": "Spent",
   "budget.budget": "Budget",
@@ -57,6 +64,12 @@ export const en = {
   "settings.budgetWarning": "Warn at",
   "settings.adminKey": "Admin key (optional)",
   "settings.adminKeyHint": "Anthropic Admin API key (sk-ant-admin01-…) to show the real, organisation-wide monthly cost.",
+  "settings.envTitle": "Settings from environment variables",
+  "settings.envHint": "These ${NAME} references take their values from the server's environment (.env). Move the values into the configuration so everything is set here – then remove the variables from .env.",
+  "settings.envApply": "Move into the configuration",
+  "settings.envConfirm": "Write the current values of {names} into the configuration file? Keys are then stored in the config (and in its backups) instead of the environment.",
+  "settings.envDone": "{n} values moved into the configuration. You can now remove them from .env.",
+  "settings.envUnset": "Referenced but not set (left as they are):",
   "settings.fetchPrices": "Fetch prices",
   "settings.pricesFetched": "Prices updated for {n} models – save to keep them.",
   "stats.perMillion": "per 1M tok",
@@ -646,7 +659,7 @@ export const en = {
   "settings.baseUrl": "Base URL",
   "settings.apiKey": "API key",
   "settings.apiKeyStored": "Stored – leave empty to keep",
-  "settings.apiKeyHint": "Prefer ${ENV_VAR} references; literal keys are stored in plain text in the config file.",
+  "settings.apiKeyHint": "Stored in the configuration file (readable for admins, included in backups). ${NAME} references to environment variables still work.",
   "settings.authPrefix": "Auth prefix",
   "settings.enabled": "Enabled",
   "settings.modelCount": "{n} models",