fix: persist environment selection in Zustand store instead of URL params

Environment selector was losing its value on navigation because URL search
params were silently dropped by navigate() calls. Moved to a Zustand store
with localStorage persistence so the selection survives navigation, page
refresh, and new tabs. Switching environment now resets all filters, clears
URL params, invalidates queries, and remounts pages via Outlet key. Also
syncs openapi.json schema with running backend.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -37,8 +37,8 @@ java -jar cameleer3-server-app/target/cameleer3-server-app-1.0-SNAPSHOT.jar
 - Depends on `com.cameleer3:cameleer3-common` from Gitea Maven registry
 - Jackson `JavaTimeModule` for `Instant` deserialization
 - Communication: receives HTTP POST data from agents (executions, diagrams, metrics, logs), serves SSE event streams for config push/commands (config-update, deep-trace, replay, route-control)
-- Maintains agent instance registry (in-memory) with states: LIVE → STALE → DEAD. Auto-heals from JWT claims + heartbeat capabilities on heartbeat/SSE after server restart. Capabilities are updated on every heartbeat (protocol v2). Route catalog falls back to ClickHouse stats for route discovery when registry has incomplete data.
-- Multi-tenancy: each server instance serves one tenant (configured via `CAMELEER_TENANT_ID`, default: `"default"`). Environments (dev/staging/prod) are first-class — agents send `environmentId` at registration. PostgreSQL isolated via schema-per-tenant (`?currentSchema=tenant_{id}`). ClickHouse shared DB with `tenant_id` + `environment` columns, partitioned by `(tenant_id, toYYYYMM(timestamp))`.
+- Maintains agent instance registry (in-memory) with states: LIVE → STALE → DEAD. Auto-heals from JWT `env` claim + heartbeat body on heartbeat/SSE after server restart (priority: heartbeat `environmentId` > JWT `env` claim > `"default"`). Capabilities and route states updated on every heartbeat (protocol v2). Route catalog falls back to ClickHouse stats for route discovery when registry has incomplete data.
+- Multi-tenancy: each server instance serves one tenant (configured via `CAMELEER_TENANT_ID`, default: `"default"`). Environments (dev/staging/prod) are first-class — agents send `environmentId` at registration and in heartbeats. JWT carries `env` claim for environment persistence across token refresh. PostgreSQL isolated via schema-per-tenant (`?currentSchema=tenant_{id}`). ClickHouse shared DB with `tenant_id` + `environment` columns, partitioned by `(tenant_id, toYYYYMM(timestamp))`.
 - Storage: PostgreSQL for RBAC, config, and audit; ClickHouse for all observability data (executions, search, logs, metrics, stats, diagrams). ClickHouse schema migrations in `clickhouse/*.sql`, run idempotently on startup by `ClickHouseSchemaInitializer`. Use `IF NOT EXISTS` for CREATE and ADD PROJECTION.
 - Logging: ClickHouse JDBC set to INFO (`com.clickhouse`), HTTP client to WARN (`org.apache.hc.client5`) in application.yml
 - Security: JWT auth with RBAC (AGENT/VIEWER/OPERATOR/ADMIN roles), Ed25519 config signing (key derived deterministically from JWT secret via HMAC-SHA256), bootstrap token for registration
@@ -63,6 +63,7 @@ java -jar cameleer3-server-app/target/cameleer3-server-app-1.0-SNAPSHOT.jar
 ## UI Styling
 
 - Always use `@cameleer/design-system` CSS variables for colors (`var(--amber)`, `var(--error)`, `var(--success)`, etc.) — never hardcode hex values. This applies to CSS modules, inline styles, and SVG `fill`/`stroke` attributes. SVG presentation attributes resolve `var()` correctly.
+- Global user preferences (environment selection) use Zustand stores with localStorage persistence — never URL search params. URL params are for page-specific state only (e.g. `?text=` search query). Switching environment resets all filters and remounts pages.
 
 ## Disabled Skills