fix(tui): remove double space after numbered-list marker

[sean-kim05]

Closes #684

What

In strix/interface/tui/renderers/agent_message_renderer.py, _apply_markdown_styles() renders an ordered-list line by emitting its own "N. " prefix and then re-rendering the remainder starting at line[2:]. A numbered marker ("1. ") is 3 characters, so line[2:] still contains the marker's trailing space — producing a doubled space.

Before

1.  Hello      # two spaces

After

1. Hello       # one space

Why

The sibling bullet branch uses line[2:] correctly because "- " is exactly 2 chars. The numbered branch needs line[3:] to skip the full 3-char marker.

Change

One character: line[2:] → line[3:], confined to the numbered-list branch. Blockquote/bullet branches are unchanged (still line[2:], verified).

Tests

Added tests/test_agent_message_renderer.py:

• "1. Hello" → "1. Hello" (single space)
• "2) World" → "2. World"
• bullet unaffected: "- Item" → "• Item"

These fail on the old line[2:] (double space) and pass with the fix. Full suite: 86 passed; ruff check/format clean; mypy adds no new errors.

[greptile-apps]

Greptile Summary

This PR fixes ordered-list spacing in the TUI markdown renderer. The main changes are:

• Uses the full three-character numbered marker when slicing list item text.
• Adds tests for dot-style and paren-style numbered lists.
• Adds a bullet-list test to confirm that branch is unchanged.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.
• The renderer branch only matches three-character single-digit markers, and the new slice matches that marker length.
• The added tests cover the reported spacing regression and the nearby bullet path.

Important Files Changed

Filename	Overview
strix/interface/tui/renderers/agent_message_renderer.py	Changes the ordered-list branch to remove the full N. or N) marker before inline formatting.
tests/test_agent_message_renderer.py	Adds focused tests for numbered-list spacing and unchanged bullet rendering.

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