feat(FN-3573): broaden runtime ignore list for live fusion app paths (+2 more)

Commits merged:
- chore(test-isolation): broaden runtime ignore list for live fusion app paths
- feat(FN-3573): complete Step 2 — add plugin setup API client helpers
- feat(FN-3573): complete Step 1 — backfill plugin setup routes

Files changed:
plugins/fusion-plugin-agent-browser/README.md      | 26 ++++++
 plugins/fusion-plugin-agent-browser/manifest.json  | 15 ++++
 plugins/fusion-plugin-agent-browser/package.json   | 25 ++++++
 .../src/__tests__/index.test.ts                    | 66 +++++++++++++++
 .../src/__tests__/prompts.test.ts                  | 21 +++++
 .../src/__tests__/setup.test.ts                    | 39 +++++++++
 .../src/__tests__/skills.test.ts                   |  9 ++
 .../src/__tests__/tools.test.ts                    | 55 ++++++++++++
 .../src/__tests__/types.test.ts                    | 16 ++++
 .../src/__tests__/workflow-steps.test.ts           | 10 +++
 plugins/fusion-plugin-agent-browser/src/index.ts   | 67 +++++++++++++++
 plugins/fusion-plugin-agent-browser/src/probe.ts   | 98 ++++++++++++++++++++++
 plugins/fusion-plugin-agent-browser/src/prompts.ts | 23 +++++
 plugins/fusion-plugin-agent-browser/src/setup.ts   | 31 +++++++
 plugins/fusion-plugin-agent-browser/src/skills.ts  | 12 +++
 plugins/fusion-plugin-agent-browser/src/tools.ts   | 34 ++++++++
 plugins/fusion-plugin-agent-browser/src/types.ts   | 56 +++++++++++++
 .../src/workflow-steps.ts                          | 15 ++++
 plugins/fusion-plugin-agent-browser/tsconfig.json  |  9 ++
 .../fusion-plugin-agent-browser/vitest.config.ts   | 22 +++++
 pnpm-lock.yaml                                     | 16 ++++
 pnpm-workspace.yaml                                |  1 +
 22 files changed, 666 insertions(+)

Fusion-Task-Id: FN-3573

plugins/fusion-plugin-agent-browser/src/workflow-steps.ts

@@ -0,0 +1,15 @@
+import type { PluginWorkflowStepContribution } from "@fusion/plugin-sdk";
+
+export const AGENT_BROWSER_WORKFLOW_STEPS: PluginWorkflowStepContribution[] = [
+  {
+    stepId: "browser-evidence-review",
+    name: "Browser Evidence Review",
+    description: "Verify claims include browser-derived evidence and links.",
+    mode: "prompt",
+    phase: "pre-merge",
+    prompt: "Confirm browser-derived statements are traceable to captured evidence and cite links when present.",
+    toolMode: "readonly",
+    enabled: true,
+    defaultOn: false,
+  },
+];