fix(t-paliad-207): drop with_po flag — R.19 Einspruch is always available, not flag-gated (mig 098)

m's correction 2026-05-18: the R.19 Einspruch (preliminary objection)
should not be flag-gated. It's an always-available optional submission
the defendant can make once the SoC is served — same logic as the
appeal-spawn rules in t-paliad-203 F2.3 ("the appeal is always a
possibility"). Removing the gate makes the row a normal optional rule:
priority='optional' (unchanged, set by mig 095) gives the save-modal
the existing pre-uncheck behaviour without a separate checkbox.

**Migration 098** (idempotent): NULLs condition_expr on the two RoP.019.1
rows pinned by proceeding code (`upc.inf.cfi` + `upc.rev.cfi`). Re-apply
is a no-op via the WHERE clause matching the live shape. Live DB row
state will sync when Dokploy applies the migration on next deploy — no
raw prod-write this turn (lesson from the previous shift's friction note).

**Frontend cleanup** — removes the two flag rows added to
verfahrensablauf.tsx + fristenrechner.tsx in the parent t-paliad-207
commit (inf-po-flag-row, rev-po-flag-row), the readFlags()/calculate()
push branches, the syncFlagRows() show/hide entries, and the change
listeners. Drops the 4 i18n keys (deadlines.flag.inf_po + rev_po,
DE + EN). Bun build clean: 2417 keys (was 2419, -2 keys × 2 langs).

Branch: mai/fermi/interactive-session @ third commit on top of Path A.

internal/db/migrations/098_drop_with_po_flag.down.sql

@@ -0,0 +1,10 @@
+-- Revert mig 098 — restore the with_po condition_expr (mig 095 shape).
+-- audit_reason required: set via SET LOCAL paliad.audit_reason in tooling.
+
+UPDATE paliad.deadline_rules dr
+   SET condition_expr = '{"flag":"with_po"}'::jsonb
+  FROM paliad.proceeding_types pt
+ WHERE dr.proceeding_type_id = pt.id
+   AND pt.code IN ('upc.inf.cfi', 'upc.rev.cfi')
+   AND dr.rule_code = 'RoP.019.1'
+   AND dr.condition_expr IS NULL;

internal/db/migrations/098_drop_with_po_flag.up.sql

@@ -0,0 +1,24 @@
+-- t-paliad-207 — drop the `with_po` flag from the two RoP 19 rules.
+-- m's call 2026-05-18 (interactive session): the Einspruch (R. 19) is
+-- not flag-gated — it's just an optional submission the defendant can
+-- always make, triggered by the SoC. Same reasoning that drove the
+-- always-fire decision for the appeal-spawn rules in t-paliad-203 F2.3
+-- ("appeal is always a possibility").
+--
+-- Net effect: the calculator will surface the R.19 row on every UPC_INF
+-- / UPC_REV calc as an optional row (priority='optional' already set
+-- by mig 095, unchanged here). The save-modal pre-uncheck behaviour
+-- for optional priority handles the "user opts in" gesture without a
+-- separate flag.
+--
+-- Two rows updated; pinned by proceeding code so this stays correct
+-- after any rule-id reshuffle. Idempotent: the WHERE clause matches
+-- the live shape, so re-apply is a no-op.
+
+UPDATE paliad.deadline_rules dr
+   SET condition_expr = NULL
+  FROM paliad.proceeding_types pt
+ WHERE dr.proceeding_type_id = pt.id
+   AND pt.code IN ('upc.inf.cfi', 'upc.rev.cfi')
+   AND dr.rule_code = 'RoP.019.1'
+   AND dr.condition_expr::text LIKE '%with_po%';