test: use quiet dot reporters and show output only for failing tests

Switch vitest packages (ai, agent, coding-agent) to the dot reporter
with silent: passed-only so passing tests stay quiet while failing
tests still print their console output and full diffs. Add the
github-actions reporter on CI for inline annotations. Switch the tui
node:test runner to the dot reporter as well.

packages/tui/package.json

@@ -7,7 +7,7 @@
 	"scripts": {
 		"clean": "shx rm -rf dist",
 		"build": "tsgo -p tsconfig.build.json",
-		"test": "node --test test/*.test.ts",
+		"test": "node --test --test-reporter=dot --test-reporter-destination=stdout test/*.test.ts",
 		"prepublishOnly": "npm run clean && npm run build"
 	},
 	"files": [