Redesign the Tessera frontend completely. The current version is functional but has poor UX. This is a complete rewrite of the visual design and layout — keep the existing API client (web/src/lib/api.ts) and types (web/src/lib/types.ts), rewrite everything else.

## DESIGN SYSTEM: Linear-inspired dark mode

Use the exact design tokens from the Linear design system:
- Background: #08090a (canvas), #0f1011 (panels), #191a1b (cards)
- Text: #f7f8f8 (primary), #d0d6e0 (secondary), #8a8f98 (tertiary)
- Border: rgba(255,255,255,0.08) (standard), rgba(255,255,255,0.05) (subtle)
- Accent: #5e6ad2 (primary), #7170ff (interactive), #828fff (hover)
- Font: Inter (from next/font/google), weight 400/510/590
- No pure white anywhere (#f7f8f8 is max brightness)
- No color besides indigo/violet accent and status colors

Status colors: new=#8a8f98, open=#7170ff, in_progress=#f59e0b, resolved=#22c55e, closed=#6b7280

## PAGES TO REWRITE

### 1. Layout (web/src/app/layout.tsx)
- Full-height app shell: sidebar + main content
- LEFT SIDEBAR (240px, fixed): 
  - "Tessera" brand at top (indigo gradient text or icon)
  - Saved views section with counts:
    - All tickets (count)
    - My tickets (count)
    - Unassigned (count)
    - Recently updated (count)
  - Queues section (dynamic list with counts)
  - Bottom: Admin link (gear icon), user avatar placeholder
- Sidebar styling: bg-[#0f1011], border-r border-[rgba(255,255,255,0.05)]
- Active view: bg-[rgba(255,255,255,0.05)], text-white
- Inactive view: text-[#8a8f98] hover:text-[#d0d6e0]
- Each nav item: flex justify-between, icon + label left, count badge right

### 2. Ticket List — the main view (web/src/app/page.tsx)
This is THE primary technician view. It must be fast and scannable.

- TOP BAR: search input (full width, bg-[#0f1011], border-b), "New ticket" button (indigo)
- Below: filter chips row — "All", "Open", "In progress", "Resolved", "My tickets", "Unassigned" — clickable pills
- TICKET LIST (not a heavy data table — a sleek list):
  - Each row: colored status dot (8px circle) + ticket ID (first 8 chars, monospace, muted) + subject (primary text) + queue badge + assignee avatar + relative time
  - Hover: subtle bg change, show quick actions (assign, change status)
  - Click: navigate to detail
  - Loading: skeleton rows (pulsing bg-[#191a1b])
  - Empty: "No tickets match your filters" with illustration
- Bottom: "Load more" or pagination

- CREATE TICKET DIALOG: modal with subject input + queue select + description textarea + submit

### 3. Ticket Detail — two-panel layout (web/src/app/tickets/[id]/page.tsx)
This is the heart of the product. Conversation-centric.

LAYOUT:
- LEFT (60%): Conversation thread + reply box
- RIGHT (40%): Properties sidebar

CONVERSATION THREAD:
- Each entry is a message bubble, not a table row
- Customer messages: left-aligned, lighter bg
- Agent replies: right-aligned or indigo-tinted
- System events (status changes, assignments): centered, muted, small text, no bubble — inline timeline entries like "Gjermund changed status from open → in_progress · 2 minutes ago"
- Timestamps: relative (formatDistanceToNow from date-fns), absolute on hover
- Avatars: initials circle (first letter of name), colored by hash

REPLY BOX (sticky at bottom of thread):
- Textarea with placeholder "Reply to this ticket..."
- Toggle: "Reply" (public) vs "Internal note" (private) — tab-like toggle
- Send button (indigo) + attachment button (paperclip icon, disabled for now)

PROPERTIES SIDEBAR (right panel, bg-[#0f1011], border-l):
- Status selector: large, prominent dropdown with color indicator
- Priority: not yet implemented, show placeholder
- Assignee: dropdown to assign/change owner
- Queue: display name
- Custom fields: name: value pairs, editable inline
- Created/Updated: display dates

STATUS CHANGE:
- Click status in sidebar → dropdown shows allowed transitions (from lifecycle)
- Selecting a new status shows preview of scrips that will fire (inline, not modal)
- Confirm button: "Apply — 2 scrips will fire"
- After apply: show scrip results inline (success/error with message)

### 4. Admin (web/src/app/admin/page.tsx)
- Same sidebar layout (no changes)
- Content area: tabs across top (Queues, Lifecycles, Scrips, Custom Fields)
- Each tab: clean card-based layout, not data tables
- Add button in each section header
- Forms in slide-over sheets (from right), not dialogs — sheets feel more professional
- Delete/edit: subtle icon buttons on hover

### 5. COMMAND PALETTE (new — web/src/components/command-palette.tsx)
- Trigger: Cmd+K or Ctrl+K
- Modal overlay with search input
- Actions: "New ticket", "Go to tickets", "Go to admin", search tickets by subject
- Keyboard navigation: arrow keys + enter
- Dimmed backdrop with bg-black/60

## IMPLEMENTATION NOTES

- Keep web/src/lib/api.ts and web/src/lib/types.ts as-is (they work)
- Delete all current page files and rewrite from scratch
- Delete current layout.tsx, page.tsx, tickets/[id]/page.tsx, admin/page.tsx
- Install: bun add cmdk (command palette library) or build simple one with shadcn Dialog
- All shadcn/ui components import from @/components/ui/... — reuse what's there
- Sidebar needs to be a client component with state for active view
- Use next/navigation for routing
- Loading states: skeleton everywhere (not spinners)
- Error states: inline red text with retry
- Empty states: helpful text + action button

## VERIFICATION
1. `cd web && bun run build` — zero TypeScript errors
2. Start backend on 9876, frontend on 3000-something
3. Verify: sidebar renders with saved views, ticket list shows real data, ticket detail has conversation thread + sidebar, admin has tabs in sheets
4. Commit each major section

## RULES
- All code via OpenCode. Hermes orchestrates.
- Rewrite is complete — do not keep old components
- Linear design tokens must be used exactly — verify colors match spec
- No placeholders that look broken — every state must render properly