feat(sales): admin-configurable EOI signers + richer timeline events

1. Per-port EOI signer config

     - New `eoi_signers` system_settings key (JSON: { developer, approver },
       each `{ name, email }`). Settings UI exposes it under Admin → Settings.
     - getPortEoiSigners(portId) reads the setting with a typed validator;
       falls back to the legacy David Mizrahi / Abbie May defaults if the
       row is missing or malformed (so older ports keep working until an
       admin saves a value).
     - Both EOI generation pathways now read from the helper instead of
       hardcoded constants:
         * documenso-template path (generateAndSignViaDocumensoTemplate)
         * in-app PDF-fill path (generateAndSignViaInApp)

  2. Timeline upgrades

     The interest detail Activity tab now distinguishes the new automation
     events that arrived with sessions 1+2:

     - Stage auto-advances (userId='system') get a small "Auto" pill and
       carry their reason into the description (e.g. "Stage advanced to
       EOI Signed (auto-advanced — EOI signed via Documenso)").
     - outcome_set events show "Marked as Won" / "Marked as Lost — went
       to another marina" with optional reason; trophy/X icons.
     - outcome_cleared events show "Reopened to {stage}" with a refresh
       icon.
     - Document events humanized: "Document 'X' fully signed" instead
       of "Document X: completed".
     - Stage labels run through stageLabel() so the timeline shows the
       human label, not the enum key.
     - Timestamps switched to relative-time with full-date tooltip.
     - "by system" is rendered plainly (no longer the literal user-id).

tsc clean. vitest 832/832 pass.

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

src/lib/services/document-templates.ts

@@ -23,7 +23,7 @@ import {
   sendDocument as documensoSend,
   generateDocumentFromTemplate as documensoGenerateFromTemplate,
 } from '@/lib/services/documenso-client';
-import { buildDocumensoPayload } from '@/lib/services/documenso-payload';
+import { buildDocumensoPayload, getPortEoiSigners } from '@/lib/services/documenso-payload';
 import { generateEoiPdfFromTemplate } from '@/lib/pdf/fill-eoi-form';
 import { MERGE_FIELDS, type MergeFieldCatalog } from '@/lib/templates/merge-fields';
 import { buildEoiContext } from '@/lib/services/eoi-context';
@@ -766,6 +766,7 @@ async function generateAndSignViaInApp(
       );
     }
     const eoiCtx = await buildEoiContext(context.interestId, portId);
+    const signers = await getPortEoiSigners(portId);
     resolvedSigners = [
       {
         name: eoiCtx.client.fullName,
@@ -773,8 +774,18 @@ async function generateAndSignViaInApp(
         role: 'signer',
         signingOrder: 1,
       },
-      { name: 'David Mizrahi', email: 'dm@portnimara.com', role: 'signer', signingOrder: 2 },
-      { name: 'Abbie May', email: 'sales@portnimara.com', role: 'approver', signingOrder: 3 },
+      {
+        name: signers.developer.name,
+        email: signers.developer.email,
+        role: 'signer',
+        signingOrder: 2,
+      },
+      {
+        name: signers.approver.name,
+        email: signers.approver.email,
+        role: 'approver',
+        signingOrder: 3,
+      },
     ];
   }
   if (!resolvedSigners || resolvedSigners.length === 0) {
@@ -859,12 +870,17 @@ async function generateAndSignViaDocumensoTemplate(
   }
 
   const eoiContext = await buildEoiContext(context.interestId, portId);
+  const signers = await getPortEoiSigners(portId);
 
   const payload = buildDocumensoPayload(eoiContext, {
     interestId: context.interestId,
     clientRecipientId: env.DOCUMENSO_CLIENT_RECIPIENT_ID,
     developerRecipientId: env.DOCUMENSO_DEVELOPER_RECIPIENT_ID,
     approvalRecipientId: env.DOCUMENSO_APPROVAL_RECIPIENT_ID,
+    developerName: signers.developer.name,
+    developerEmail: signers.developer.email,
+    approverName: signers.approver.name,
+    approverEmail: signers.approver.email,
     redirectUrl: env.APP_URL,
   });