refactor(ts): one compactNumber and one reasoning-effort value set in @hermes/shared

Three hand-rolled compact-number formatters and two mirrored copies of the
reasoning-effort value set collapse into apps/shared/src/format.ts and
apps/shared/src/reasoning-effort.ts, exported from the package root and as
the subpaths `@hermes/shared/format` / `@hermes/shared/reasoning-effort`
(the TUI compiles with lib ES2023 and imports subpaths only). Surfaces keep
their own label maps and UI helpers. No re-export shims remain.

Convention for compactNumber (desktop's implementation, moved verbatim):
lowercase 'k', uppercase 'M', promotion-guarded thresholds (>= 999.5 -> k,
>= 999_950 -> M) so rounding can never print "1000k", trailing ".0"
stripped, non-finite / <= 0 -> "0".

Sites (path::symbol -> canonical):

  apps/desktop/src/lib/format.ts::compactNumber          -> apps/shared/src/format.ts::compactNumber (moved; file deleted)
  web/src/lib/format.ts::formatTokenCount                -> deleted
  ui-tui/src/lib/text.ts::fmtK                           -> deleted (text.ts's own callers use compactNumber)
  apps/desktop/src/app/agents/index.tsx                  -> @hermes/shared
  apps/desktop/src/app/chat/sidebar/chrome.tsx           -> @hermes/shared
  apps/desktop/src/app/chat/sidebar/session-row.tsx      -> @hermes/shared
  apps/desktop/src/app/command-center/index.tsx          -> @hermes/shared
  apps/desktop/src/app/shell/context-usage-panel.tsx     -> @hermes/shared
  apps/desktop/src/app/shell/titlebar-controls.tsx       -> @hermes/shared
  apps/desktop/src/app/skills/index.tsx                  -> @hermes/shared
  apps/desktop/src/app/skills/mcp-tab.tsx                -> @hermes/shared
  apps/desktop/src/components/ui/tab-dropdown.tsx        -> @hermes/shared
  apps/desktop/src/lib/statusbar.tsx                     -> @hermes/shared
  apps/desktop/src/sdk/index.ts::compactNumber           -> re-exported from @hermes/shared (plugin SDK surface unchanged)
  apps/desktop/src/plugins/kanban/{board,drawer}.tsx     -> unchanged (import via @hermes/plugin-sdk)
  web/src/components/ModelInfoCard.tsx::formatTokenCount -> @hermes/shared::compactNumber
  web/src/pages/ModelsPage.tsx::formatTokenCount         -> @hermes/shared::compactNumber
  ui-tui/src/components/appChrome.tsx::fmtK              -> @hermes/shared/format::compactNumber
  ui-tui/src/components/thinking.tsx::fmtK               -> @hermes/shared/format::compactNumber
  ui-tui/src/app/slash/commands/session.ts::fmtK         -> @hermes/shared/format::compactNumber
  ui-tui/src/__tests__/text.test.ts::fmtK suite          -> apps/shared/src/format.test.ts (table incl. promotion guard)

  apps/desktop/src/lib/reasoning-effort.ts::REASONING_EFFORTS/REASONING_EFFORT_VALUES/
      DEFAULT_REASONING_EFFORT/ReasoningEffort/isReasoningEffort  -> apps/shared/src/reasoning-effort.ts
      (SHORT_LABELS, reasoningEffortLabel, isThinkingEnabled, resolveReasoningEffort stay local)
  apps/desktop/src/app/settings/constants.ts             -> @hermes/shared
  apps/desktop/src/app/settings/model-settings.tsx       -> @hermes/shared
  apps/desktop/src/app/shell/model-catalog-menu.tsx      -> @hermes/shared (+ local reasoningEffortLabel)
  apps/desktop/src/app/shell/model-edit-submenu.tsx      -> @hermes/shared (+ local UI helpers)
  apps/desktop/src/app/shell/model-menu-panel.tsx        -> @hermes/shared
  apps/desktop/src/lib/model-status-label.ts             -> @hermes/shared (+ local reasoningEffortLabel)
  apps/desktop/src/sdk/index.ts                          -> value set re-exported from @hermes/shared; label helper stays from '@/lib/reasoning-effort'
  apps/desktop/src/lib/reasoning-effort.test.ts          -> value-set + isReasoningEffort cases moved to apps/shared/src/reasoning-effort.test.ts
  web/src/lib/reasoning-effort.ts::EFFORT_OPTIONS        -> labels mapped over shared REASONING_EFFORT_VALUES (same order: none, then 7 levels)
  web/src/lib/reasoning-effort.ts::VALID_EFFORTS         -> Set(REASONING_EFFORT_VALUES); normalizeEffort falls back to DEFAULT_REASONING_EFFORT

Semantics kept: web `none` is selectable; desktop `none` resolves to ''
(thinking off); desktop isReasoningEffort still trims + lowercases.

Behavior change:
  - web: token counts on the Models page and ModelInfoCard now print a
    lowercase 'k' and are promotion-guarded: 128_000 "128K" -> "128k",
    999_999 "1000.0K" -> "1M", 1_500 "1.5K" -> "1.5k". 'M' is unchanged.
  - TUI: fmtK used Intl compact notation; compactNumber differs only in
    suffix case and the guard: 1_000_000 "1m" -> "1M", and billions no
    longer get a 'b' suffix (1_000_000_000 "1b" -> "1000M"). Sub-million
    values are identical ("999", "1k", "1.5k"). Non-positive values now
    print "0" instead of "-1k".
  - desktop: none (its formatter moved verbatim).

Tests: apps/shared/src/format.test.ts::"compactNumber" (table incl.
999_999 -> "1M", 999_949 -> "999.9k"; fails when the promotion guard is
removed) and apps/shared/src/reasoning-effort.test.ts::"reasoning-effort"
(no duplicate values, `none` is the only non-level, default is a member;
fails on a duplicated level or a `none`-accepting isReasoningEffort).

web/src/components/ModelInfoCard.tsx

@@ -3,7 +3,7 @@ import { Brain, Eye, Gauge, Lightbulb, Wrench } from "lucide-react";
 import { Spinner } from "@nous-research/ui/ui/components/spinner";
 import { api } from "@/lib/api";
 import type { ModelInfoResponse } from "@/lib/api";
-import { formatTokenCount } from "@/lib/format";
+import { compactNumber } from "@hermes/shared";
 
 interface ModelInfoCardProps {
   /** Current model string from config state — used to detect changes */
@@ -57,11 +57,11 @@ export function ModelInfoCard({
         </div>
         <div className="flex items-center gap-2">
           <span className="font-mono font-semibold text-foreground">
-            {formatTokenCount(info.effective_context_length)}
+            {compactNumber(info.effective_context_length)}
           </span>
           {info.config_context_length > 0 ? (
             <span className="text-amber-500 text-xs">
-              (override — auto: {formatTokenCount(info.auto_context_length)})
+              (override — auto: {compactNumber(info.auto_context_length)})
             </span>
           ) : (
             <span className="text-text-tertiary text-xs">
@@ -78,7 +78,7 @@ export function ModelInfoCard({
             <span className="font-medium">Max Output</span>
           </div>
           <span className="font-mono font-semibold text-foreground">
-            {formatTokenCount(caps.max_output_tokens)}
+            {compactNumber(caps.max_output_tokens)}
           </span>
         </div>
       )}

web/src/lib/format.ts

@@ -1,9 +0,0 @@
-/**
- * Format a token count as a human-readable string (e.g. 1M, 128K, 4096).
- * Strips trailing ".0" for clean round numbers.
- */
-export function formatTokenCount(n: number): string {
-  if (n >= 1_000_000) return `${(n / 1_000_000).toFixed(n % 1_000_000 === 0 ? 0 : 1)}M`;
-  if (n >= 1_000) return `${(n / 1_000).toFixed(n % 1_000 === 0 ? 0 : 1)}K`;
-  return String(n);
-}

web/src/lib/reasoning-effort.ts

@@ -1,12 +1,18 @@
+import {
+  DEFAULT_REASONING_EFFORT,
+  REASONING_EFFORT_VALUES,
+  type ReasoningEffortValue,
+} from "@hermes/shared";
+
 /**
  * Pure reasoning-effort helpers shared by the dashboard ReasoningPicker.
  *
  * Kept DOM-free so the node-environment vitest harness can cover the
  * resolution logic without loading React or the UI kit.
  *
- * Values mirror hermes_constants.VALID_REASONING_EFFORTS plus `none`
- * (thinking-off). An empty/unset config value means the Hermes default,
- * which is `medium`.
+ * Values come from @hermes/shared (hermes_constants.VALID_REASONING_EFFORTS
+ * plus `none`, thinking-off). An empty/unset config value means the Hermes
+ * default.
  */
 
 export interface EffortOption {
@@ -14,25 +20,28 @@ export interface EffortOption {
   label: string;
 }
 
-export const EFFORT_OPTIONS: ReadonlyArray<EffortOption> = [
-  { value: "none", label: "Off (no thinking)" },
-  { value: "minimal", label: "Minimal" },
-  { value: "low", label: "Low" },
-  { value: "medium", label: "Medium" },
-  { value: "high", label: "High" },
-  { value: "xhigh", label: "Extra High" },
-  { value: "max", label: "Max" },
-  { value: "ultra", label: "Ultra" },
-];
+const EFFORT_LABELS: Record<ReasoningEffortValue, string> = {
+  none: "Off (no thinking)",
+  minimal: "Minimal",
+  low: "Low",
+  medium: "Medium",
+  high: "High",
+  xhigh: "Extra High",
+  max: "Max",
+  ultra: "Ultra",
+};
 
-export const VALID_EFFORTS: ReadonlySet<string> = new Set(
-  EFFORT_OPTIONS.map((o) => o.value),
+/** `none` first, then the seven levels ascending — the shared value order. */
+export const EFFORT_OPTIONS: ReadonlyArray<EffortOption> = REASONING_EFFORT_VALUES.map(
+  (value) => ({ value, label: EFFORT_LABELS[value] }),
 );
 
+export const VALID_EFFORTS: ReadonlySet<string> = new Set(REASONING_EFFORT_VALUES);
+
 /** Normalize a raw `agent.reasoning_effort` config value to a selectable
  *  option. Empty/unknown → `medium` (Hermes' default when unset). */
 export function normalizeEffort(raw: unknown): string {
   const value = String(raw ?? "").trim().toLowerCase();
-  if (!value) return "medium";
-  return VALID_EFFORTS.has(value) ? value : "medium";
+  if (!value) return DEFAULT_REASONING_EFFORT;
+  return VALID_EFFORTS.has(value) ? value : DEFAULT_REASONING_EFFORT;
 }

web/src/pages/ModelsPage.tsx

@@ -28,7 +28,7 @@ import {
   DASHBOARD_MODAL_PANEL,
   shouldCloseOuterModalOnEscape,
 } from "@/lib/dashboard-modal-shell";
-import { formatTokenCount } from "@/lib/format";
+import { compactNumber } from "@hermes/shared";
 import { Button } from "@nous-research/ui/ui/components/button";
 import { Spinner } from "@nous-research/ui/ui/components/spinner";
 import { Stats } from "@nous-research/ui/ui/components/stats";
@@ -430,12 +430,12 @@ function ModelCard({
               )}
               {caps.context_window && caps.context_window > 0 && (
                 <span className="text-xs text-text-secondary">
-                  {formatTokenCount(caps.context_window)} ctx
+                  {compactNumber(caps.context_window)} ctx
                 </span>
               )}
               {caps.max_output_tokens && caps.max_output_tokens > 0 && (
                 <span className="text-xs text-text-secondary">
-                  {formatTokenCount(caps.max_output_tokens)} out
+                  {compactNumber(caps.max_output_tokens)} out
                 </span>
               )}
             </div>