feat(v2): machine detail dialog — settlements + per-row actions (P9b)

Adds the operator's primary workspace: a full-screen dialog opened from
any Fleet row that shows the machine's settlement history with action
menus for retry / partial-dispense / force-reset / note-add.

Template (templates/satmachineadmin/index.html):
  - Full-screen Quasar dialog with q-bar header (machine name + fiat
    chip + reload + close)
  - Machine metadata strip: npub (copyable), wallet_id, location,
    fallback_commission_pct
  - Settlements table: status badge, time, gross / net / commission
    (with super/op breakdown beneath), fiat amount, payment_hash short
  - Notes blob expansion under each settlement row (pre-formatted)
  - Per-row action menu (q-btn-dropdown):
      • Add note         — always available
      • Retry            — when status='errored'
      • Partial dispense — when status in {pending, errored}
      • Force-reset      — when status in {pending, processing}
  - Warning icon (⚠) on rows where used_fallback_split=true, namechecking
    aiolabs/lamassu-next#44 in the tooltip
  - Three sub-dialogs:
      • Partial-dispense with fraction/sats toggle + notes input
      • Add-note dialog (free-form, non-empty validation)
      • (Retry/force-reset use Quasar.Dialog inline)

JS (static/js/index.js):
  - viewMachine() opens detail and triggers reloadMachineDetail()
  - GET /api/v1/dca/machines/{id}/settlements feeds the table
  - confirmRetrySettlement → POST .../retry
  - openPartialDispense → POST .../partial-dispense
  - confirmForceReset    → POST .../force-reset
  - openSettlementNote   → POST .../notes
  - _replaceSettlement() updates the table row in-place from PUT/POST
    responses so the operator sees instant feedback without a reload
  - settlementStatusColor() maps statuses to Quasar badge colors
  - formatSats / formatFiat / formatTime helpers; respect locale

Also: added data/ + *.sqlite3 to .gitignore so the
2026-05-14 auth-key leak can't recur from this repo (the equivalent
fix already landed in satmachineclient on the matching branch).

Refs: aiolabs/satmachineadmin#9 — closes the operator-detail-view
gap for #3 (partial dispense) + #4 (settlement) UX

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -2,3 +2,8 @@ __pycache__
 node_modules
 .mypy_cache
 .venv
+
+# LNbits runtime data — auth keys, dev DB files, etc.
+data/
+*.sqlite3
+*.sqlite3-journal