test(decnet_web): raise coverage floor after AttackerDetail split

Phase 1 of the UI refactor is in. AttackerDetail dropped from
2,579 LOC inline data + JSX to a 408-LOC shell composed of
extracted sections, each with co-located tests. Lock the gain by
bumping the threshold floor in vite.config.ts:

  lines       0 -> 7
  functions   0 -> 6
  branches    0 -> 5
  statements  0 -> 7

Future PRs raise these; never lower. Phase 1 final scoreboard:
9 test files, 45 tests, all green.

decnet_web/vite.config.ts

@@ -15,11 +15,13 @@ export default defineConfig({
       include: ['src/**/*.{ts,tsx}'],
       exclude: ['src/**/*.d.ts', 'src/test/**', 'src/main.tsx'],
       // Baseline floors. Each refactor PR raises these; never lower.
+      // Locked in after Phase 1 (AttackerDetail split: hook + 6 sections,
+      // 45 tests across 9 files): 7.78% lines, 5.35% branches.
       thresholds: {
-        lines: 0,
-        functions: 0,
-        branches: 0,
-        statements: 0,
+        lines: 7,
+        functions: 6,
+        branches: 5,
+        statements: 7,
       },
     },
   },