feat(electrobun): port all Tauri features — full settings, popup menus, provider capabilities
New components (8):
- provider-capabilities.ts: per-provider feature flags (claude/codex/ollama)
- settings/AppearanceSettings.svelte: theme, fonts, cursor, scrollback
- settings/AgentSettings.svelte: shell, CWD, permissions, providers
- settings/SecuritySettings.svelte: keyring, secrets, branch policies
- settings/ProjectSettings.svelte: per-project provider/model/worktree/sandbox
- settings/OrchestrationSettings.svelte: wake strategy, notifications, anchors
- settings/AdvancedSettings.svelte: logging, OTLP, plugins, import/export
Updated:
- ChatInput: radial context indicator (78% demo, color-coded arc),
4 popup menus (upload/context/web/slash), provider-gated icons
- SettingsDrawer: 6-category sidebar shell
- AgentPane: passes provider + contextPct to ChatInput
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