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/lib/db/seed.ts

@@ -2,16 +2,16 @@
  * Seed script for Port Nimara CRM.
  *
  * Top-level orchestrator:
- *   1. Create 3 ports (idempotent):
- *        - Port Nimara
- *        - Marina Azzurra
- *        - Harbor Royale
+ *   1. Create the operational ports (idempotent):
+ *        - Port Nimara (primary install — the real marina)
+ *        - Port Amador (secondary, kept for multi-tenant isolation tests
+ *                       and as scaffolding for a future Panama install)
  *   2. Create 5 system roles with full permission maps
  *   3. Create the super admin user profile placeholder (matt@portnimara.com)
  *   4. For each port, call `seedPortData(portId, portSlug)` from seed-data.ts
  *      to produce the realistic multi-cardinality fixture
- *      (berths, clients, companies, yachts, memberships, interests,
- *      reservations, ownership-transfer history).
+ *      (117 berths from the NocoDB snapshot, plus clients, companies, yachts,
+ *      memberships, interests, reservations, ownership-transfer history).
  *   5. Print a summary.
  *
  * Run with: pnpm db:seed
@@ -413,19 +413,15 @@ const PORT_DEFINITIONS: Array<{
     defaultCurrency: 'USD',
     timezone: 'America/Anguilla',
   },
+  // Second port kept for multi-tenant isolation tests (cross-port scoping,
+  // permission boundaries). Drop or rename if the production install is
+  // single-port.
   {
-    name: 'Marina Azzurra',
-    slug: 'marina-azzurra',
-    primaryColor: '#2E86AB',
-    defaultCurrency: 'EUR',
-    timezone: 'Europe/Rome',
-  },
-  {
-    name: 'Harbor Royale',
-    slug: 'harbor-royale',
-    primaryColor: '#8B1E3F',
-    defaultCurrency: 'GBP',
-    timezone: 'Europe/London',
+    name: 'Port Amador',
+    slug: 'port-amador',
+    primaryColor: '#D97706',
+    defaultCurrency: 'USD',
+    timezone: 'America/Panama',
   },
 ];