feat(FN-3024): add experimental agent onboarding modal with create form han

This merge delivers v0.12.0, which includes a new experimental agent onboarding modal (`ExperimentalAgentOnboardingModal`) that streamlines the handoff from onboarding to the create-agent form, along with backend lifecycle tests and documentation for the experimental flag. The release bumps all work

Fusion-Task-Id: FN-3024

docs/agents.md

@@ -261,6 +261,17 @@ Before clicking **Create**, the final review step remains editable for identity/
 
 The final `createAgent(...)` call always uses the latest values from these step-2 controls.
 
+### Experimental planning-style onboarding
+
+When **Settings → Experimental Features → Planning-style Agent Onboarding** (`experimentalFeatures.agentOnboarding`) is enabled, clicking **New Agent** opens an AI-guided onboarding modal instead of jumping straight to the classic dialog.
+
+- The onboarding flow asks clarifying questions using repo-aware context (existing agents + preset/template options).
+- It generates a **draft** agent configuration summary (name/role/instructions and optional template or pattern provenance).
+- Clicking **Continue to agent form** hands that draft into the existing `NewAgentDialog` as a prefill for human review and edits.
+- The onboarding flow does **not** auto-create agents directly.
+
+When `experimentalFeatures.agentOnboarding` is disabled, the original `NewAgentDialog` behavior remains unchanged and opens immediately from **New Agent**.
+
 The dashboard provides quick-start presets for common agent roles. Each preset includes:
 
 - **Name and icon** - Display identification

docs/settings-reference.md

@@ -800,6 +800,9 @@ Common built-in dashboard flags include:
 - `nodesView`
 - `devServerView`
 - `todoView`
+- `researchView`
+- `remoteAccess`
+- `agentOnboarding` (gates the planning-style New Agent onboarding flow in Agents view)
 
 ---