[shift-tab-crash] fix(core/config): prevent panic on Shift+Tab when projects is not a table

[just-every-code]

Fixes #194

Problem

• Pressing Shift+Tab crashed the app with an unwrap panic at core/src/config.rs:827.
• Root cause: when persisting per‑project access mode, the code assumed [projects] in config.toml was always a TOML table. If a user’s config had a conflicting scalar (e.g., projects = "…"), as_table_mut().unwrap() panicked.

Change

• In set_project_access_mode:
  • Ensure projects exists and is a table; if the key exists with a non‑table type, replace it with a new table instead of unwrapping.
  • Ensure the per‑project entry exists and is a table; replace if it exists with the wrong type.
  • Return a descriptive error if, for any reason, the table cannot be prepared (no unwrap).

Why this is safe

• Only affects config writing when toggling access mode (e.g., via Shift+Tab).
• Preserves existing valid table contents; only replaces invalid shapes to avoid panics.
• Keeps atomic write behavior and existing trust‑level harmonization logic.

Validation

• Built locally with ./build-fast.sh (no warnings/errors).
• Verified the panic site is now guarded against non‑table projects keys and invalid per‑project entries.

Notes

• This is a minimal, targeted fix that addresses the reported crash without touching unrelated areas.

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Auto-generated for issue #194 by a workflow.
Author: @github-actions[bot]

[github-actions]

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You can run this right now! In your terminal just use:

code preview shift-tab-crash

This will run the version of Code we've created for this issue.

Direct downloads:

• Linux x86_64 (.zst): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-x86_64-unknown-linux-musl.zst
• Linux x86_64 (.tar.gz): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-x86_64-unknown-linux-musl.tar.gz
• Linux aarch64 (.zst): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-aarch64-unknown-linux-musl.zst
• Linux aarch64 (.tar.gz): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-aarch64-unknown-linux-musl.tar.gz
• macOS x86_64 (.zst): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-x86_64-apple-darwin.zst
• macOS x86_64 (.tar.gz): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-x86_64-apple-darwin.tar.gz
• macOS arm64 (.zst): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-aarch64-apple-darwin.zst
• macOS arm64 (.tar.gz): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-aarch64-apple-darwin.tar.gz
• Windows x86_64 (.zip): https://github.com/just-every/code/releases/download/preview-shift-tab-crash/code-x86_64-pc-windows-msvc.exe.zip

After you run it, please comment here and let me know if it does what you need.