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/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@fusion-plugin-examples/agent-browser",
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Agent Browser runtime and prompt/skill/workflow contributions for Fusion",
+  "private": true,
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "build": "tsc",
+    "test": "vitest run --silent=passed-only --reporter=dot"
+  },
+  "dependencies": {
+    "@fusion/plugin-sdk": "workspace:*"
+  },
+  "devDependencies": {
+    "@types/node": "^25.5.2",
+    "typescript": "^5.7.0",
+    "vitest": "^3.2.4"
+  }
+}