feat(berths,seed): polish detail display + prune ports to Port Nimara + Amador

Berth detail (src/components/berths/berth-tabs.tsx):
- Numeric display polish, exposed by the new NocoDB-sourced seed:
  - Power capacity now renders with kW unit (e.g. "330 kW")
  - Voltage now renders with V unit (e.g. "480 V")
  - All metric/imperial values rounded to <= 2 decimals
    (was: "62.999112 m" -> now: "62.99 m")
  - Nominal Boat Size shows full ft + m pair (was: ft only)

Seed ports (src/lib/db/seed.ts):
- Drop Marina Azzurra and Harbor Royale; install now seeds only:
  - Port Nimara  (the real install)
  - Port Amador  (secondary, for multi-tenant isolation tests / Panama
                  scaffolding)
- Existing dev DBs are not touched; this only affects fresh `pnpm db:seed`
  runs. Users wanting to migrate should drop existing rows in the obsolete
  ports manually before re-seeding.

Verification:
- lint clean, tsc unchanged from baseline (36 pre-existing errors), 858/858
  vitest passing.

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

src/components/berths/berth-tabs.tsx

@@ -57,13 +57,45 @@ function SpecRow({ label, value }: { label: string; value: React.ReactNode }) {
 }
 
 function OverviewTab({ berth }: { berth: BerthData }) {
+  // Round to at most 2 decimals; trim trailing zeros so "5.00" -> "5".
+  const fmt = (v: string | null, fractionDigits = 2): string | null => {
+    if (v == null || v === '') return null;
+    const n = Number(v);
+    if (Number.isNaN(n)) return v;
+    return n.toLocaleString('en-US', {
+      minimumFractionDigits: 0,
+      maximumFractionDigits: fractionDigits,
+    });
+  };
+
   const formatDim = (ft: string | null, m: string | null) => {
     const parts = [];
-    if (ft) parts.push(`${ft} ft`);
-    if (m) parts.push(`${m} m`);
+    const ftFmt = fmt(ft);
+    const mFmt = fmt(m);
+    if (ftFmt) parts.push(`${ftFmt} ft`);
+    if (mFmt) parts.push(`${mFmt} m`);
     return parts.length > 0 ? parts.join(' / ') : null;
   };
 
+  const formatNominalBoatSize = (ft: string | null, m: string | null): string | null => {
+    const ftFmt = fmt(ft, 0);
+    const mFmt = fmt(m);
+    const parts: string[] = [];
+    if (ftFmt) parts.push(`${ftFmt} ft`);
+    if (mFmt) parts.push(`${mFmt} m`);
+    return parts.length > 0 ? parts.join(' / ') : null;
+  };
+
+  const formatPower = (kw: string | null) => {
+    const v = fmt(kw, 0);
+    return v ? `${v} kW` : null;
+  };
+
+  const formatVoltage = (v: string | null) => {
+    const fv = fmt(v, 0);
+    return fv ? `${fv} V` : null;
+  };
+
   const price = berth.price
     ? new Intl.NumberFormat('en-US', {
         style: 'currency',
@@ -97,7 +129,7 @@ function OverviewTab({ berth }: { berth: BerthData }) {
             <SpecRow label="Draft" value={formatDim(berth.draftFt, berth.draftM)} />
             <SpecRow
               label="Nominal Boat Size"
-              value={berth.nominalBoatSize || berth.nominalBoatSizeM}
+              value={formatNominalBoatSize(berth.nominalBoatSize, berth.nominalBoatSizeM)}
             />
             <SpecRow
               label="Water Depth"
@@ -122,8 +154,8 @@ function OverviewTab({ berth }: { berth: BerthData }) {
               <CardTitle className="text-sm font-medium">Infrastructure</CardTitle>
             </CardHeader>
             <CardContent className="pt-0 divide-y">
-              <SpecRow label="Power Capacity" value={berth.powerCapacity} />
-              <SpecRow label="Voltage" value={berth.voltage} />
+              <SpecRow label="Power Capacity" value={formatPower(berth.powerCapacity)} />
+              <SpecRow label="Voltage" value={formatVoltage(berth.voltage)} />
               <SpecRow label="Cleat Type" value={berth.cleatType} />
               <SpecRow label="Cleat Capacity" value={berth.cleatCapacity} />
               <SpecRow label="Bollard Type" value={berth.bollardType} />