[ckafrouni]

Problem

The desktop presentation had inconsistent sidebar layouts and lacked the Synara styling requested for this fork. Keeping separate Activity and project-list sidebars also added UI and maintenance work that is no longer needed.

Change

• Adopt Synara's frame, icons, panel-tab styling, composer, animated new-chat background, and macOS transparency. Add a Synara palette and preserve the original palettes under T3 Code. Panel animations default to 125 ms.
• Keep Activity as the only thread sidebar. Remove the project-list component, switch, retired preferences, unused expansion state/helpers, unused icon aliases and legacy hooks, and auto-animate dependency. Old saved settings still decode while preserving other preferences.
• Present existing project groups as Spaces, with Home including unassigned projects. Add pinned project/Space shortcuts with their actual icons and saved drag ordering. The Spaces manager fills the workspace beside the rail.
• Preserve T3's single active-thread header and existing provider, conversation, panel, and compaction workflows. No multi-thread tabs are introduced.
• Isolate development Electron profiles and Safe Storage identities to prevent repeated Keychain prompts. Package the adjustable macOS blur add-on with native vibrancy as its fallback.
• Carry the palettes through mobile theme generation and include Synara's MIT attribution. Mobile navigation is unchanged.

Scope and approval

Maintainer-requested Otter Code fork work, refined in this coding session around Synara presentation and T3 functionality. This PR targets the fork's main; it is not an upstream T3 submission. Server/provider orchestration is unchanged. Shared client runtime only makes two internally used project-grouping helpers private; their behavior is unchanged.

The 468 changed files include 173 SVG icon assets and 170 source files whose changes are limited to imports. The remaining 125 contain the UI/native/theme work, tests, and supporting changes.

Verification

• Rebased onto the fixed main at b17f73966 without conflicts. The updated mobile activity tests also pass. 690 focused tests passed across contracts/settings compatibility, native window materials and dev identity, packaging, sidebar logic, UI state, Spaces/rail selection, new-thread actions, and themes.
• 123 focused Chromium component tests passed across the timeline, composer geometry, panel tabs and keyboard navigation, sidebar pointer handling, palette focus, settings restoration, and settings selectors. Screenshots were disabled.
• Additional focused checks passed for native materials/packaging, Safe Storage, mobile theme generation/contrast, compaction, and composer behavior during implementation.
• After the CI cleanup, 345 focused tests passed for generation consistency, theme/native materials, grouping, sidebar/status behavior, discovery, permissions, and thread state. Web, desktop, and mobile typechecks passed; targeted lint, formatting, scoped unused-code, dependency, and export checks, and frozen-lockfile installation passed. License synchronization passed during implementation.
• Earlier verification in the real desktop app using isolated state covered: Activity in Home/Spaces, project filtering/search, sidebar collapse/expand, project icons and rail ordering, Spaces manager width, continuous new-chat background, PR titlebar paint, and panel close glyphs. Imported fixtures contain stopped histories; live userdata was not modified.
• Inherited limitation: the menu trigger reports a stale aria-expanded value after opening, also reproduced with the upstream control/icon. Pointer opening, menu visibility, and Escape closing pass; its runtime was preserved.
• Native mobile UI was not exercised. Adjustable native blur is macOS-specific; other platforms retain their fallback surfaces.
• Visual attachments are omitted at the maintainer's request; desktop verification is described above.

Model: GPT-6.1-sol. Harness: Codex in T3 Code.