feat(i18n): katalog id/en — semua string UI via T()/Tf(), fallback en, TIA_LANG sementara + e2e English

internal/i18n/locales/en.yaml

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+# English catalog (fallback) — F-023
+# Rule: technical terms (Env, Image, Volume, Stack, Shell, CPU, RAM, PID, Log,
+# Docker, API) are not translated.
+
+nav:
+  home: "home"
+  containers: "containers"
+
+section:
+  clock: "Clock"
+  host: "Host"
+  containers: "Containers"
+  activity: "Activity"
+  detail: "Detail"
+
+host:
+  local: "local"
+
+field:
+  id: "ID"
+  image: "Image"
+  state: "State"
+  status: "Status"
+  host: "Host"
+  cpu: "CPU"
+  ram: "RAM"
+  uptime: "Uptime"
+  engine: "Engine"
+  api: "API"
+
+state:
+  loading: "loading…"
+  noContainers: "no containers yet"
+  connected: "● connected"
+  running: "running"
+  exited: "stopped"
+  paused: "paused"
+  restarting: "restarting"
+  created: "created"
+  dead: "dead"
+
+error:
+  fail: "FAILED"
+  warn: "WARNING"
+  ok: "OK"
+  loadFailed: "Failed to load"
+  loadContainers: "Failed to load container list"
+
+hint:
+  retry: "press r to retry"
+  noContainers: "No containers yet — run something with Docker, then press r."
+  miniNoContainers: "no containers yet — press 1"
+  tabsComing: "Detail tabs (Logs · Stats · Config) coming in Phase 2."
+  footerHome: "[1/enter] containers · [t] toast · [a] reduced-motion · [q] quit"
+  footerContainers: "[j/k] select · [r] reload · [0/esc] home · [q] quit"
+
+footer:
+  status: "%s   animation %s fps · audio: %s"
+
+toast:
+  demoTitle: "✔ [ SUCCESS ] Conversion Saved"
+  demoBody: "Stack 'web-app' saved to ~/.tia/stacks/web-app/"
+  dockerError: "✖ [ FAILED ] Docker"
+
+activity:
+  coming: "Docker events listener coming (Phase 2)."
+  willShow: "This panel will show the 5 most recent events:"
+  examples: "container start/stop, image pulls, latest error."
+
+fmt:
+  countTotal: "%d total"
+  dockerContainers: "%d running / %d total"
+  coreLoad: "%d core · load %.2f"
+  ramUsage: "%3d%% "
+  listMore: "… %d more (press 1)"
+  phase: "Phase %s"
+
+duration:
+  days: "%d days %d hours"
+  hours: "%d hours %d mins"
+  minutes: "%d mins"
+
+doctor:
+  dockerDaemonUnreachable: "daemon not responding: %v"
+  dockerOk: "engine %s (API %s) · %d/%d containers running · %d images"
+  stacksMissing: "%s (missing — created during onboarding)"
+
+cli:
+  unknownCommand: "unknown command: %q"
+
+usage:
+  usage: "Usage:"
+  open: "Open the interactive TUI"
+  doctor: "Check system health (docker, audio, stacks)"
+  version: "Show version & build info"
+  more: "Other CLI subcommands (convert, ps, up, down, update) arriving in Phase 2–3 — see docs/PRD.md §F-028."