[FEATURE] Web UI: No persistent user-level settings (e.g. attribution config) across sessions

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Problem

Claude Code on the web (claude.ai/code) runs ephemeral containers. There is no
persistent user-level settings layer (~/.claude/settings.json equivalent) for
web sessions. Settings like attribution.commit, attribution.pr, and
attribution.sessionUrl cannot be configured globally for web users.
The only workarounds are:

• Commit .claude/settings.json to each repo (unacceptable for public repos)
• Install the CLI/desktop app (defeats the purpose of the web UI)

Environment

• Claude Code on the web (claude.ai/code)
• No CLI installed

Proposed Solution

Expected behaviour

Web UI users should be able to configure persistent account-level settings
(at minimum attribution and basic behaviour flags) through the claude.ai
interface, equivalent to ~/.claude/settings.json on CLI/desktop.

Alternative Solutions

According to claude itself, there is no alternative solution apart from requesting it here.
This is from claude itself: "Bottom line: The attribution link suppression you want is only fully solvable on CLI/desktop today. The web UI has no equivalent persistent config layer — that's a gap Anthropic hasn't filled yet. If you want to flag it, their issue tracker is at github.com/anthropics/claude-code/issues."

Priority

High - Significant impact on productivity

Feature Category

Configuration and settings

Use Case Example

For example,

1. i work on public git repositories
2. i would like to tell code universally for all my sessions, to exclude the session link in all commits.
3. Our session conversations should remain private and not be commited to public repositories!

Right now i have to remember to manually edit the environment for each new session and copy paste my rules to it, every time!

Additional Context

_No response_