fix(tui): Handle file paths with hashtags

[saksham1341]

What does this PR do?

This PR fixes #11790, improving the robustness of file path handling and line range parsing in the TUI autocomplete component.

• Fixed Line Range Parsing: Updated extractLineRange to only treat a # as a separator if it is followed by a valid line range pattern (e.g., #123 or #123-456). This prevents filenames containing # (like file#name.txt or temp#dir/file#name.txt) from being incorrectly truncated.
• Refactored Logic: removeLineRange now utilizes extractLineRange internally, ensuring consistent parsing behavior across the component.
• Safe URL Construction: Replaced manual file:// string concatenation with pathToFileURL(path.resolve(...)). This ensures that special characters in file paths (spaces, #, ?, etc.) are properly percent-encoded according to URI standards, preventing broken file links in the TUI.

How did you verify your code works?

• Create a sample temp directory.

mkdir temp
cd temp
echo -e "hello world\nhello world again\nand again" > "file#name.txt"
mkdir "temp#dir"
cp "file#name.txt" "temp#dir/file#name.txt"

• Run opencode and tag both files, asking if they are same. The model should say that they have the same content.

Images

[github-actions]

Hey! Your PR title FIX #11990 (tui): Handle file paths with hashtags doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

No duplicate PRs found

[saksham1341]

#11790 is now fixed by another PR, so closing this one.