feat: drop dim colors, keep only bright variants renamed to base names

Remove the 8 non-bright and 1 bright-black colors from all color maps.
Rename the remaining 7 bright-* colors to their base names (e.g.
bright-green → green) so the palette is smaller and always vibrant.

Update _init_color_pairs in tui.py to always apply A_BOLD (all palette
entries are now bright variants), and fix all tests to match.

tests/unit/test_agent_provider.py

@@ -74,7 +74,7 @@ class TestAgentProviderRuntime(unittest.TestCase):
                 instance_name="bot-bottle-test",
                 prompt_file=prompt_file,
                 label="review-api",
-                color="bright-cyan",
+                color="cyan",
             )
             prompt = prompt_file.read_text()
             config = Path(tmp, "codex-config.toml").read_text()

tests/unit/test_backend_terminal.py

@@ -11,14 +11,14 @@ class TestPalettePrintf(unittest.TestCase):
     def test_known_color_returns_printf(self):
         cmd = palette_printf("red")
         self.assertTrue(cmd.startswith("printf '"))
-        self.assertIn("\\033]4;1;", cmd)   # normal red
-        self.assertIn("\\033]4;9;", cmd)   # bright red
+        self.assertIn("\\033]4;9;", cmd)   # bright-red slot
+        self.assertIn("\\033]4;1;", cmd)   # normal-red slot
         self.assertIn("\\033]11;", cmd)    # default background tint
 
-    def test_bright_variant_sets_both_slots(self):
-        cmd = palette_printf("bright-blue")
-        self.assertIn("\\033]4;12;", cmd)  # bright-blue
-        self.assertIn("\\033]4;4;", cmd)   # blue
+    def test_color_sets_both_palette_slots(self):
+        cmd = palette_printf("blue")
+        self.assertIn("\\033]4;12;", cmd)  # bright-blue slot
+        self.assertIn("\\033]4;4;", cmd)   # normal-blue slot
 
     def test_unknown_color_returns_empty(self):
         self.assertEqual("", palette_printf(""))
@@ -26,10 +26,7 @@ class TestPalettePrintf(unittest.TestCase):
 
     def test_all_named_colors_produce_output(self):
         colors = [
-            "black", "red", "green", "yellow",
-            "blue", "magenta", "cyan", "white",
-            "bright-black", "bright-red", "bright-green", "bright-yellow",
-            "bright-blue", "bright-magenta", "bright-cyan", "bright-white",
+            "red", "green", "yellow", "blue", "magenta", "cyan", "white",
         ]
         for color in colors:
             with self.subTest(color=color):

tests/unit/test_contrib_claude_provider.py

@@ -276,7 +276,7 @@ class TestClaudeUiProvision(unittest.TestCase):
                 instance_name="bot-bottle-demo-abc12",
                 prompt_file=prompt_file,
                 label="research-ui",
-                color="bright-cyan",
+                color="cyan",
             )
             settings = json.loads((state_dir / "claude-settings.json").read_text())
             statusline = (state_dir / "claude-statusline.sh").read_text()

tests/unit/test_contrib_codex_provider.py

@@ -158,7 +158,7 @@ class TestCodexProvisionPrompt(unittest.TestCase):
                 instance_name="bot-bottle-demo-abc12",
                 prompt_file=prompt_file,
                 label="research-ui",
-                color="bright-cyan",
+                color="cyan",
             )
             config = (state_dir / "codex-config.toml").read_text()
             prompt_text = prompt_file.read_text()