/**
 * Pure helpers behind the sidebar's project management: the create/rename
 * title rule (a client-side mirror of the Host's `project-admin` guard, so an
 * invalid title never leaves the panel) and the session-switcher projection —
 * the dsh session list folded into the small immutable view the panel renders.
 * DOM-free so both are unit-testable.
 * @module dsh-client-ui-mimir/client/project-form
 */
/** Title length cap of one project (mirrors the Host's project-admin rule). */
export declare const PROJECT_TITLE_MAX_LENGTH = 200;
/**
 * Trim and validate one project title (create and rename share the rule).
 * @param title - the raw input.
 * @returns the cleaned title, or null when it is blank or over the cap.
 */
export declare function cleanProjectTitle(title: string): string | null;
/**
 * The selection hand-off after a successful delete, decided against the
 * LATEST list and selection (the caller re-reads them after the await, never
 * its click-time closure): undefined leaves the selection alone (another
 * project was deleted), an id selects the first remaining project, null
 * deselects (nothing remains).
 * @param projects - the post-delete project list.
 * @param deletedId - the deleted project's id.
 * @param selectedProjectId - the current selection.
 * @returns the selection action to apply.
 */
export declare function nextSelectionAfterDelete(projects: readonly {
    readonly id: string;
}[], deletedId: string, selectedProjectId: string | null): string | null | undefined;
/** One session row of the switcher: the delivery target of "… with AI" verbs. */
export interface ResearchSessionEntry {
    readonly id: string;
    readonly title: string;
    readonly running: boolean;
}
/** The session switcher's immutable view: the list plus the current selection. */
export interface ResearchSessionListView {
    readonly current: string | null;
    readonly list: readonly ResearchSessionEntry[];
}
/** The slice of the dsh session-list snapshot the projection reads. */
export interface SessionListSource {
    readonly ids: readonly string[];
    readonly byId: Readonly<Record<string, {
        readonly displayTitle: string;
        readonly running: boolean;
        readonly retainedBy?: Readonly<Record<string, number | undefined>>;
    } | undefined>>;
}
/**
 * The "current" session of the workbench: the row the main conversation view
 * holds through its `mainView` reference (the sessions service no longer
 * tracks a global selection; the view's retention IS the selection).
 * @param state - the sessions service's list snapshot.
 * @returns the retained session id, or null when no row is main-view retained.
 */
export declare function currentSessionIdOf(state: SessionListSource): string | null;
/**
 * Project one dsh session-list snapshot into the switcher view.
 * @param state - the sessions service's list snapshot.
 * @returns the panel-facing view (current = null when nothing is selected).
 */
export declare function sessionListView(state: SessionListSource): ResearchSessionListView;
/**
 * Value equality of two switcher views; the observable adapter keeps reference
 * identity while nothing moved, so the selector hook never re-renders on an
 * unrelated session-store bump.
 */
export declare function sameSessionListView(left: ResearchSessionListView, right: ResearchSessionListView): boolean;
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