Render database names and failures verbatim in the inspector

A database name, a location and an exception message all reach the info modal
as configuration-derived text, and Rich reads `[...]` in any of them as markup:
a name like `beta [prod]` disappeared, and a message carrying `[Errno 2]` or a
stray closing tag could break the line it sat in.

haiku_rag_slim/haiku/rag/inspector/widgets/info_modal.py

@@ -1,6 +1,7 @@
 import asyncio
 from typing import TYPE_CHECKING
 
+from rich.markup import escape
 from textual.app import ComposeResult
 from textual.binding import Binding
 from textual.containers import Vertical, VerticalScroll
@@ -35,12 +36,11 @@ async def database_lines(client: "HaikuRAG") -> list[str]:
         db = client.store.db
         stats = await get_database_stats(db)
     except Exception as e:
-        return [f"[red]Failed to open database: {e}[/red]"]
+        return [f"[red]Failed to open database: {escape(str(e))}[/red]"]
 
-    # The store read these on open; a second query would re-read and re-parse
-    # the same blob.
+    # The store read and parsed these on open.
     settings = client.store.stored_settings
-    stored_version = str(settings.get("version", "unknown"))
+    stored_version = escape(str(settings.get("version", "unknown")))
     embed_model_obj = settings.get("embeddings", {}).get("model", {})
     embed_provider = embed_model_obj.get("provider")
     embed_model = embed_model_obj.get("name")
@@ -56,9 +56,9 @@ async def database_lines(client: "HaikuRAG") -> list[str]:
     )
 
     if embed_provider or embed_model or vector_dim:
-        provider_part = embed_provider or "unknown"
-        model_part = embed_model or "unknown"
-        dim_part = f"{vector_dim}" if vector_dim is not None else "unknown"
+        provider_part = escape(str(embed_provider or "unknown"))
+        model_part = escape(str(embed_model or "unknown"))
+        dim_part = escape(str(vector_dim)) if vector_dim is not None else "unknown"
         lines.append(
             f"[bold $accent]embeddings[/bold $accent]: "
             f"{provider_part}/{model_part} (dim: {dim_part})"
@@ -172,11 +172,15 @@ class InfoModal(ModalScreen):
             for block in blocks:
                 lines.extend(block)
         else:
-            lines.append(f"[bold $accent]location[/bold $accent]: {location}")
+            lines.append(
+                f"[bold $accent]location[/bold $accent]: {escape(str(location))}"
+            )
             lines.extend(await database_lines(self.client))
 
         lines.append("[bold]Versions[/bold]")
-        versions = get_package_versions()
+        versions = {
+            key: escape(str(value)) for key, value in get_package_versions().items()
+        }
         lines.append(f"[bold $accent]haiku.rag[/bold $accent]: {versions['haiku_rag']}")
         lines.append(f"[bold $accent]lancedb[/bold $accent]: {versions['lancedb']}")
         lines.append(f"[bold $accent]docling[/bold $accent]: {versions['docling']}")
@@ -192,13 +196,13 @@ class InfoModal(ModalScreen):
 
     async def _report(self, name: str) -> list[str]:
         """One database's block, including its own failure to open."""
-        lines = [f"[bold]{name}[/bold]"]
+        lines = [f"[bold]{escape(name)}[/bold]"]
         try:
             (owner,) = await self.client.clients_for([name])
         except Exception as e:
             # The client names a configured database by name and never by
             # location, so its message is safe to show.
-            return [*lines, f"[red]{e}[/red]", ""]
+            return [*lines, f"[red]{escape(str(e))}[/red]", ""]
         return [*lines, *await database_lines(owner)]
 
     async def action_dismiss(self, result=None) -> None:

tests/test_inspector.py

@@ -446,9 +446,47 @@ class TestReportingEachDatabase:
             "database 'beta' could not be opened: OSError"
         )
         modal.client = client
-        modal.db_path = None
 
         lines = await modal._report("beta")
 
         assert lines[0] == "[bold]beta[/bold]"
         assert "could not be opened" in lines[1]
+
+    @pytest.mark.asyncio
+    async def test_a_failure_with_bracketed_text_renders_literally(self):
+        """Error text and database names render verbatim, not as Rich markup."""
+        from rich.text import Text
+
+        from haiku.rag.inspector.widgets.info_modal import InfoModal
+        from haiku.rag.store.exceptions import SourceUnavailableError
+
+        modal = InfoModal.__new__(InfoModal)
+        client = AsyncMock()
+        message = "database 'beta [prod]' could not be opened: [/red] [Errno 2]"
+        client.clients_for.side_effect = SourceUnavailableError(message)
+        modal.client = client
+
+        lines = await modal._report("beta [prod]")
+
+        assert Text.from_markup(lines[0]).plain == "beta [prod]"
+        assert message in Text.from_markup(lines[1]).plain
+
+    @pytest.mark.asyncio
+    async def test_an_open_failure_with_bracketed_text_renders_literally(
+        self, tmp_path
+    ):
+        """A stats-read failure renders its message verbatim, not as markup."""
+        from rich.text import Text
+
+        from haiku.rag.inspector.widgets.info_modal import database_lines
+        from haiku.rag.store.engine import ConnectionMode
+
+        client = MagicMock()
+        client.store.db_path = tmp_path
+        client.store._connection_mode = ConnectionMode.LOCAL
+        message = "Schema error: no field named [vector, text] [/red]"
+        type(client.store).db = property(MagicMock(side_effect=RuntimeError(message)))
+
+        lines = await database_lines(client)
+
+        assert message in Text.from_markup(lines[0]).plain