feat: v3.0.0 - intelligent search, GitHub person/project mode, ELI5, 13+ sources

v3 rewrites the search engine from the ground up:

- Intelligent pre-research: resolves X handles, GitHub repos, subreddits,
  TikTok hashtags, and YouTube channels before searching
- GitHub person-mode: PR velocity, top repos by stars, release notes
- GitHub project-mode: live star counts, README, releases, top issues
- ELI5 mode: plain language synthesis, no jargon
- 13+ sources: Reddit, X, YouTube, TikTok, Instagram, HN, Polymarket,
  GitHub, Threads, Pinterest, Perplexity, Bluesky, Web
- Free Reddit comments via public JSON (no API key needed)
- Fun judge v2: humor scoring baked into narrative
- Cookie consent before browser scanning
- 10,000 free ScrapeCreators calls
- 1,012 tests

Thank you to the community contributors whose issues and PRs shaped v3:
@uppinote20 (#143), @zerone0x (#134, #136), @thinkun (#116),
@thomasmktong (#124), @fanispoulinakisai-boop (#100), @pejmanjohn (#78),
@zl190 (#115), @hnshah (#84, #85, #86)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/test_ui_v3.py

@@ -0,0 +1,77 @@
+# ruff: noqa: E402
+import io
+import sys
+import unittest
+from contextlib import redirect_stderr
+from pathlib import Path
+from unittest import mock
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "scripts"))
+
+from lib import ui
+
+
+class UiV3Tests(unittest.TestCase):
+    def test_show_diagnostic_banner_uses_v3_source_model(self):
+        diag = {
+            "available_sources": ["grounding", "youtube"],
+            "providers": {"google": True, "openai": False, "xai": False},
+            "x_backend": None,
+            "bird_installed": True,
+            "bird_authenticated": False,
+            "bird_username": None,
+            "native_web_backend": "brave",
+        }
+        with mock.patch.object(ui, "IS_TTY", False):
+            stderr = io.StringIO()
+            with redirect_stderr(stderr):
+                ui.show_diagnostic_banner(diag)
+        output = stderr.getvalue()
+        self.assertIn("Reddit", output)
+        self.assertIn("unavailable", output)
+        self.assertIn("Add AUTH_TOKEN/CT0 or XAI_API_KEY", output)
+        self.assertIn("brave API available", output)
+
+    def test_build_nux_message_mentions_v3_unlock_paths(self):
+        text = ui._build_nux_message(
+            {"available_sources": ["reddit", "youtube", "grounding"]}
+        )
+        self.assertIn("Reddit ✓, X ✗, YouTube ✓, Web ✓", text)
+        self.assertIn("works fine as-is", text)
+        self.assertIn("all free", text)
+
+    def test_show_complete_uses_actual_sources_for_source_restricted_runs(self):
+        with mock.patch.object(ui, "IS_TTY", False):
+            stderr = io.StringIO()
+            with redirect_stderr(stderr):
+                progress = ui.ProgressDisplay("test topic", show_banner=False)
+                progress.show_complete(
+                    source_counts={"grounding": 2},
+                    display_sources=["grounding"],
+                )
+        output = stderr.getvalue()
+        self.assertIn("Web: 2 results", output)
+        self.assertNotIn("Reddit:", output)
+        self.assertNotIn("X:", output)
+
+    def test_show_complete_supports_newer_sources(self):
+        with mock.patch.object(ui, "IS_TTY", False):
+            stderr = io.StringIO()
+            with redirect_stderr(stderr):
+                progress = ui.ProgressDisplay("test topic", show_banner=False)
+                progress.show_complete(
+                    source_counts={
+                        "bluesky": 3,
+                        "truthsocial": 1,
+                        "xiaohongshu": 4,
+                    },
+                    display_sources=["bluesky", "truthsocial", "xiaohongshu"],
+                )
+        output = stderr.getvalue()
+        self.assertIn("Bluesky: 3 posts", output)
+        self.assertIn("Truth Social: 1 post", output)
+        self.assertIn("Xiaohongshu: 4 posts", output)
+
+
+if __name__ == "__main__":
+    unittest.main()