Add mining self-surgery for on-host recovery when AI control detects stalls.

When ai_control_enabled and mining interrupts or hashrate drops, the server composes same-agent fix plans (container restart, chain reorder, GPU swap, idle tune, RandomX restart) with Seer and oath ledger audit — no spread or lateral escalation.

server/web/src/help/miningSelfSurgery.test.ts

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+import { describe, expect, it } from 'vitest';
+import { isMiningSelfSurgeryEvent, miningSelfSurgerySummary } from './miningSelfSurgery';
+
+describe('miningSelfSurgery', () => {
+  it('detects mining_self_surgery seer events', () => {
+    expect(isMiningSelfSurgeryEvent({ event_type: 'mining_self_surgery' })).toBe(true);
+    expect(isMiningSelfSurgeryEvent({ event_type: 'surgical_replay' })).toBe(false);
+  });
+
+  it('summarizes trigger, actions, and outcome', () => {
+    const summary = miningSelfSurgerySummary({
+      event_type: 'mining_self_surgery',
+      payload: {
+        trigger: 'mining_interrupt',
+        actions: ['container_restart', 'randomx_restart'],
+        outcome: 'ok',
+      },
+    });
+    expect(summary).toContain('mining_interrupt');
+    expect(summary).toContain('container_restart');
+    expect(summary).toContain('ok');
+  });
+
+  it('never mentions spread commands in summary helper', () => {
+    const summary = miningSelfSurgerySummary({
+      event_type: 'mining_self_surgery',
+      payload: { trigger: 'low_hashrate', actions: ['idle_threshold_tune'] },
+    });
+    expect(summary).not.toContain('discover');
+    expect(summary).not.toContain('spread');
+  });
+});

server/web/src/help/miningSelfSurgery.ts

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+import type { SeerEventRecord } from './seerEvents';
+
+/** Seer feed row for on-host mining self-surgery (no spread). */
+export function isMiningSelfSurgeryEvent(event: SeerEventRecord): boolean {
+  return event.event_type === 'mining_self_surgery';
+}
+
+export function miningSelfSurgerySummary(event: SeerEventRecord): string {
+  if (!isMiningSelfSurgeryEvent(event)) {
+    return '';
+  }
+  const p = event.payload ?? {};
+  const trigger = typeof p.trigger === 'string' ? p.trigger : 'mining';
+  const outcome = typeof p.outcome === 'string' ? p.outcome : '';
+  const actions = Array.isArray(p.actions) ? p.actions.join(', ') : '';
+  const base = `Mining self-surgery (${trigger})`;
+  if (actions) {
+    return `${base}: ${actions}${outcome ? ` → ${outcome}` : ''}`;
+  }
+  return outcome ? `${base} → ${outcome}` : base;
+}