Add Config tab, CodeMirror editors, and project folder groups

[aarlint]

Summary

• CodeMirror editors: Memory, Skills, and Agents viewers now use CodeMirror with syntax highlighting and save support (replaces plain <pre> blocks)
• Project folder groups: Drag-and-drop folder groups in the sidebar to organize projects, with tree-line UI and persistent state
• Unified Config tab: Consolidates 3 separate sidebar tabs (Memory, Skills, Agents) into a single "Config" tab that groups all .claude/ files by category. Adds per-project scoping via a config button on each project header, with breadcrumb navigation back to global view

Config tab details

• Backend: get-config(projectPath) returns all config items in a uniform shape; read-config / save-config with path validation
• Frontend: 12 duplicated functions replaced with 4 (loadConfig, renderConfig, buildConfigItem, openConfig)
• Sidebar reduced from 7 tabs to 5: Sessions, Plans, Stats, Config, Settings

Test plan

• Click Config tab → shows global files grouped by category (Memory, Commands, Skills)
• Click a file → CodeMirror opens with content, Save/Copy buttons work
• Click config button on a project header → Config sidebar shows that project's files with breadcrumb
• Click "Global" breadcrumb → returns to global config view
• Search within config tab → filters across all categories
• Folder groups: create, rename, drag projects in/out, delete
• All other tabs (Sessions, Plans, Stats, Settings) still work correctly

🤖 Generated with Claude Code

[abasiri]

I think the css got messed up, i see this now, where the CLI panel should be

[aarlint]

@abasiri Sorry about that, late night, claude destroyed the css and I didnt catch it. Its ready for a preview. Let me know what you think.

[abasiri]

The branch was still broken with the same issue. I reimplemented your changes and cherry picked them into PR #11. The only thing missing still from it is the nested projects feature.

[abasiri]

Changes will be in version 0.0.14