Samsung-style edge panel v2 — additive, 33% max width, dock untouched

Key decisions (the thinking through)

1. Width — 33% max, but use Samsung's actual numbers as floor

• Hard cap: 33vw — never more than ⅓ of viewport, regardless of screen size
• Min: 200px — below that, 2-col grid breaks and labels overflow
• Default by viewport: 220px (mobile), 280px (tablet), 360px (desktop)
• Operator can drag-resize between 200px and 33vw. Width persists in localStorage
• Why not Samsung's 82% on mobile? Samsung optimizes for single-hand reach. We optimize for "see the app behind" — operator is editing, not launching. 56% mobile / 25% desktop leaves enough context

2. Additive, not replacement

• The 4-edge dock system stays exactly as it is — pills, drag, dock, detach, all unchanged
• The edge panel is a second way to access the same tools, with a stronger overview
• Both can be open simultaneously — the edge panel is just a launcher, not a state container
• Clicking a tool in the edge panel opens the corresponding dock panel — the edge panel then slides out (or stays, user setting)

3. Entry points stay the same

• Edge handle (4-6px wide, right edge): visible when dev mode is on, swipe to open
• Dev toggle (the icon, bottom-right): still works, also opens the edge panel
• Dock pills: still work as direct tool launchers — they're the quick path for known tools
• Edge panel: the "show me everything" path — when the operator doesn't remember which dock has which tool

4. The 2-col grid stays the right call

• At 220px (mobile), 2 cells of ~95px each — icon (18px) + name (9px) fits with 8px padding
• At 360px (desktop), 2 cells of ~165px each — more breathing room, room for badges
• 3-col would be too cramped on mobile, 1-col would be too tall on desktop
• 2-col is the Samsung pattern and it works

5. Footer is the + Section / + Container / + Widget

• These are the "what to add" actions, used constantly during editing
• Always visible at the bottom, never scrollable away
• The arrow ▼ hints at "expand to full bottom bar" — but that's the dock, not duplicated
• Operator can also access via dock pills, or via tree slot right-click

6. Tabs grow into the future

• Tools (now): the 12 CMS tools
• Recent (now): recently-touched sections
• Saved (future): operator's pinned tools / favorites
• AI (future): LLM actions (generate / modify / analyze)
• History (future): undo stack visualization
• Horizontal swipe inside the body flips between tabs

7. What I did NOT change

• Did not change the dock system (4 edges, pills, drag, dock, detach)
• Did not change the Dev toggle (still icon, bottom-right, setDevMode)
• Did not change the inspector, structure panel, or any other panel
• Did not change the setDevMode API or behavior
• Edge panel is a new, optional, additive component