Adds a dedicated Workspace Prompt editor for Company Brain organizations while preserving the existing Organization Context ingestion-filter controls for every organization manager.
## Changes
- Keeps Organization Context byte-for-byte unchanged and available independently to all organization managers.
- Adds Workspace Prompt as a separate Company-Brain-only section below it, using the established settings styling and contextual divider.
- Describes Workspace Prompt as persistent guidance that can shape operating preferences, priorities, source/tool choices, workflows, terminology, formatting, and communication style.
- Adds nullable, 1,500-character `workspacePrompt` support to shared request, GET response, and PATCH response contracts.
- Aligns PATCH validation with the real `{ orgId, orgSlug, updated }` API response.
- Merges canonical `updated` settings into the submitting organization’s cache, then exactly refetches that organization.
- Preserves drafts during background refetches, isolates organization switches, retains actionable errors, accessibility, empty `filterPrompt` compatibility, and `X-App-Source: nova`.
## Testing
- Passed focused Biome checks on all changed files.
- Passed `packages/lib` and `packages/validation` TypeScript checks.
- Verified GET/PATCH settings response contracts, partial/null/limit validation, canonical cache merge, and exact organization-bound invalidation.
- Verified Organization Context remains unchanged and Workspace Prompt is separately Company-Brain/manager-gated.
- Confirmed no remaining Workspace Persona identifiers.
- Public preview returns HTTP 200; authenticated settings interactions remain unavailable without a saved OAuth session.
- Full web type-check remains blocked by unrelated baseline diagnostics; none reference changed files.
- No dedicated tests were added, per requester instruction.
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**Session Details**
- Session: [View Session](https://supermemory.us1.vorflux.com/agent-sessions/7544b72b-aeca-48e2-81c3-514df21cd081)
- Requested by: Soham Daga (soham@supermemory.com)
- Address comments on this PR. Add `(aside)` to your comment to have me ignore it.
### Implemented nova spaces multi-select
##### Summary
- Renamed "All Spaces" to "Nova Spaces" - now filters to only nova content (sm_project_*)
- Added multi-select spaces support via "Select Spaces" modal
- Projects API now returns `{ nova, developer }` instead of `{ projects }`
##### Changes
- `selectedProject` → `selectedProjects[]` (array-based selection)
- New `SelectSpacesModal` component for picking multiple spaces
- Selected spaces appear at top in modal
- Search works by containerTag
- Graphs filter by selected spaces
### Add user display name functionality and enhance space management with emoji support and deletion capabilities.
### What changed?
- Added support for user display names, which are now stored and displayed throughout the app
- Implemented emoji support for spaces (projects), allowing users to customize their space icons
- Created a new `AddSpaceModal` component with emoji picker for creating spaces
- Added space deletion functionality with options to move content to another space or delete everything
- Enhanced the space selector UI to show emojis and delete options
