fix(ralph-loop): revalidate ownership and harden commit/session-creation failures

Three correctness fixes on top of the dispatch-before-commit invariant:

- ralph-loop-event-handler.ts: after idleSettleMs, also require state ownership and non-verification-pending to match the event source before dispatching. Applied to both the session.idle and session.error retry paths.
- verification-failure-handler.ts: if incrementIteration fails after a successful continuation injection, clear the loop state and emit a warning toast instead of returning success.
- session-reset-strategy.ts: catch thrown session.create errors so they route through the typed session_creation_rejected path instead of surfacing as an unhandled rejection.

src/hooks/ralph-loop/ralph-loop-event-handler.ts

@@ -278,6 +278,17 @@ export function createRalphLoopEventHandler(
 				if (!stateAfterSettle || !stateAfterSettle.active) {
 					return
 				}
+				if (stateAfterSettle.session_id !== undefined && stateAfterSettle.session_id !== sessionID) {
+					log(`[${HOOK_NAME}] Skipped: state rebound during settle window`, {
+						sessionID,
+						currentOwner: stateAfterSettle.session_id,
+					})
+					return
+				}
+				if (stateAfterSettle.verification_pending) {
+					log(`[${HOOK_NAME}] Skipped: state entered verification_pending during settle window`, { sessionID })
+					return
+				}
 
 				const nextIteration = stateAfterSettle.iteration + 1
 				const previewState: RalphLoopState = { ...stateAfterSettle, iteration: nextIteration }
@@ -401,6 +412,17 @@ export function createRalphLoopEventHandler(
 				if (!stateAfterSettle || !stateAfterSettle.active) {
 					return
 				}
+				if (stateAfterSettle.session_id !== undefined && stateAfterSettle.session_id !== sessionID) {
+					log(`[${HOOK_NAME}] Skipped: state rebound during settle window`, {
+						sessionID,
+						currentOwner: stateAfterSettle.session_id,
+					})
+					return
+				}
+				if (stateAfterSettle.verification_pending) {
+					log(`[${HOOK_NAME}] Skipped: state entered verification_pending during settle window`, { sessionID })
+					return
+				}
 
 				const nextIteration = stateAfterSettle.iteration + 1
 				const previewState: RalphLoopState = { ...stateAfterSettle, iteration: nextIteration }