feat(v2)(ui): operator-side LP UI matches the new dca_lp authority split

Operator no longer chooses the LP's wallet / DCA mode / autoforward —
those belong to the LP, written via satmachineclient. The Add LP /
Edit LP dialogs reduce to (machine, user_id, optional username,
status). The clients table loses the wallet / mode / autoforward
columns and gains an "Onboarded" column showing whether the LP has a
`dca_lp` row yet (server-side LEFT JOIN; `DcaClient.lp_onboarded`).

Deposit creation gate (the structural enforcement of "must onboard
first"):
- Picker annotates each LP option with "— pending onboarding" and
  disables un-onboarded LP rows.
- Selecting an un-onboarded LP shows an inline deep-orange banner
  explaining the LP needs to open satmachineclient once.
- The Record button is `:disable`d in that state. The backend
  refuses with HTTP 422 anyway (see previous commit) — UI is just
  the first line of feedback.

Backend wiring:
- `DcaClient` model gains `lp_onboarded: bool = False`, populated
  at SELECT time via a shared `_CLIENT_SELECT` / `_CLIENT_FROM`
  fragment that LEFT JOINs `dca_lp` on `user_id`. All four list/
  single-row read paths use it: by-id, by-(machine,user), by-machine,
  by-operator, by-user. No extra round-trip per row.
- CSV export drops the removed columns; adds `lp_onboarded`.

All 86 unit tests still pass.

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

templates/satmachineadmin/index.html

@@ -222,13 +222,21 @@
                 <q-td key="username">
                   <span v-text="props.row.username || shortId(props.row.user_id)"></span>
                 </q-td>
-                <q-td key="wallet_id">
-                  <code :style="{fontSize: '0.8em'}"
-                        v-text="shortId(props.row.wallet_id)"></code>
-                </q-td>
-                <q-td key="dca_mode">
-                  <q-badge :color="props.row.dca_mode === 'flow' ? 'blue' : 'purple'"
-                           :label="props.row.dca_mode"></q-badge>
+                <q-td key="onboarded">
+                  <q-icon v-if="props.row.lp_onboarded"
+                          name="check_circle" color="green" size="sm">
+                    <q-tooltip>
+                      LP has onboarded via satmachineclient.
+                      Deposits and DCA distributions can proceed.
+                    </q-tooltip>
+                  </q-icon>
+                  <q-icon v-else name="pending" color="deep-orange" size="sm">
+                    <q-tooltip>
+                      LP hasn't installed/opened satmachineclient yet.
+                      Deposits will be refused until they register and
+                      select a DCA wallet.
+                    </q-tooltip>
+                  </q-icon>
                 </q-td>
                 <q-td key="remaining_balance" class="text-right">
                   <span v-if="clientBalances[props.row.id]"
@@ -236,18 +244,6 @@
                         v-text="formatFiat(clientBalances[props.row.id].remaining_balance, clientBalances[props.row.id].currency)"></span>
                   <span v-else :style="{opacity: 0.5}">…</span>
                 </q-td>
-                <q-td key="autoforward">
-                  <q-icon v-if="props.row.autoforward_enabled"
-                          name="forward_to_inbox" color="primary" size="sm">
-                    <q-tooltip>
-                      Auto-forward enabled →
-                      <span v-text="props.row.autoforward_ln_address || '(no address)'"></span>
-                    </q-tooltip>
-                  </q-icon>
-                  <q-icon v-else name="forward" color="grey-5" size="sm">
-                    <q-tooltip>Auto-forward disabled</q-tooltip>
-                  </q-icon>
-                </q-td>
                 <q-td key="status">
                   <q-badge
                     :color="props.row.status === 'active' ? 'green' : 'grey'"
@@ -1128,6 +1124,17 @@
             class="q-mb-md" dense outlined
             :rules="[v => !!v || 'Pick an LP']"></q-select>
 
+          <q-banner v-if="depositDialog.mode === 'add' && selectedDepositClient && !selectedDepositClient.lp_onboarded"
+            class="bg-deep-orange-1 text-grey-9 q-mb-md">
+            <template v-slot:avatar>
+              <q-icon name="pending" color="deep-orange"></q-icon>
+            </template>
+            This LP hasn't onboarded via <b>satmachineclient</b> yet, so
+            their DCA wallet isn't configured. Ask them to open the
+            satmachineclient extension once and the deposit will be
+            accepted next time.
+          </q-banner>
+
           <q-input v-model.number="depositDialog.data.amount"
             label="Amount (fiat)"
             type="number" step="0.01" min="0"
@@ -1148,6 +1155,7 @@
           <q-btn color="primary"
             :label="depositDialog.mode === 'add' ? 'Record' : 'Save'"
             :loading="depositDialog.saving"
+            :disable="depositDialog.mode === 'add' && (!selectedDepositClient || !selectedDepositClient.lp_onboarded)"
             @click="submitDeposit"></q-btn>
         </q-card-actions>
       </q-card>
@@ -1195,9 +1203,10 @@
         <q-card-section>
           <p class="text-caption q-mb-md" :style="{opacity: 0.7}"
              v-if="clientDialog.mode === 'add'">
-            LPs receive DCA distributions proportional to their remaining
-            balance. Each LP is scoped to a single machine; the same LP user
-            can register at multiple machines as separate rows.
+            Enrol an LP at one of your machines. Wallet, DCA mode, and
+            autoforward are configured by the LP themselves via the
+            <b>satmachineclient</b> extension — you can't set them here.
+            Deposits are refused until the LP has registered.
           </p>
 
           <q-select
@@ -1217,38 +1226,9 @@
             class="q-mb-md" dense outlined
             :rules="[v => !!v || 'Required']"></q-input>
 
-          <q-input v-if="clientDialog.mode === 'add'"
-            v-model="clientDialog.data.wallet_id"
-            label="LP's wallet_id (receives DCA)"
-            hint="The LP's wallet where their sats land"
-            class="q-mb-md" dense outlined
-            :rules="[v => !!v || 'Required']"></q-input>
-
           <q-input v-model="clientDialog.data.username"
             label="Display name (optional)"
-            class="q-mb-md" dense outlined></q-input>
-
-          <q-select v-model="clientDialog.data.dca_mode"
-            :options="[{label: 'Flow (proportional)', value: 'flow'},
-                       {label: 'Fixed (daily limit)', value: 'fixed'}]"
-            label="DCA mode"
-            emit-value map-options
-            class="q-mb-md" dense outlined></q-select>
-
-          <q-input v-if="clientDialog.data.dca_mode === 'fixed'"
-            v-model.number="clientDialog.data.fixed_mode_daily_limit"
-            label="Fixed mode daily limit (fiat)"
-            type="number" step="0.01"
-            class="q-mb-md" dense outlined></q-input>
-
-          <q-toggle v-model="clientDialog.data.autoforward_enabled"
-            label="Auto-forward DCA to external LN address"
-            class="q-mb-md"></q-toggle>
-
-          <q-input v-if="clientDialog.data.autoforward_enabled"
-            v-model="clientDialog.data.autoforward_ln_address"
-            label="LN address (e.g. user@walletofsatoshi.com)"
-            hint="LP-controlled; failures leave sats safely in LP's LNbits wallet"
+            hint="Operator-facing label only; doesn't affect distribution"
             class="q-mb-md" dense outlined></q-input>
 
           <q-select v-if="clientDialog.mode === 'edit'"