Background

Bare URLs containing ~ in their path are currently only clickable up to the tilde in the interactive TUI. For example, Codex renders the visible text for:

https://www.cs.tufts.edu/~nr/cs257/archive/olin-shivers/dissertation.pdf

but the OSC 8 destination stops at https://www.cs.tufts.edu/. This makes Cmd-click open the wrong location even though the terminal recognizes the complete URL outside Codex.

Fixes #26774.

Root Cause

The URL scanner already accepts ~. The truncation happens earlier: with strikethrough parsing enabled, pulldown-cmark splits this URL into adjacent decoded Event::Text values around the tilde. The Markdown renderer annotated each text event independently, so only the first event still looked like a complete URL with a supported scheme.

The renderer now merges adjacent decoded text events before URL annotation. It preserves the combined source range while retaining parser-decoded contents, which avoids regressing entities such as &.

Changes

• Add a small iterator that merges adjacent decoded Markdown text events and their source ranges.
• Apply it at the Markdown renderer boundary before hyperlink detection.
• Add regression coverage for the reported URL in prose, wrapped table output, and entity-decoded URLs.

How to Test

1. Run Codex with just c.
2. Ask the assistant to output this exact bare URL with no Markdown link syntax:
   https://www.cs.tufts.edu/~nr/cs257/archive/olin-shivers/dissertation.pdf
3. Hold Cmd and hover or click the URL.
4. Confirm the complete URL, including the suffix after ~, is one destination.
5. Repeat with the URL inside a Markdown table and confirm wrapped portions retain the same complete destination.

Targeted tests:

• just test -p codex-tui url_with_tilde
• just test -p codex-tui merged_text_events_preserve_entity_decoding

The full codex-tui test run was also executed. Its only failures were the two existing Guardian feature-flag tests:

• app::tests::update_feature_flags_disabling_guardian_clears_review_policy_and_restores_default
• app::tests::update_feature_flags_disabling_guardian_clears_manual_review_policy_without_history