fix(ux): batch UX audit fixes across spine pages

Comprehensive audit findings rolled up into one pass.

Bugs:

  - dialog.tsx — sm-breakpoint centering classes (sm:left-[50%] /
    sm:top-[50%]) were being silently stripped by tailwind-merge because
    the base inset-0 + sm:inset-auto pair counted as a conflict. Replaced
    with explicit per-side utilities (top-0 right-0 bottom-0 left-0 +
    sm:right-auto sm:bottom-auto). Every Dialog instance now centers
    correctly on desktop. (Affected 16 dialog consumers.)

  - interest-documents-tab.tsx — useQuery shared the queryKey
    ['interests', interestId] with the parent InterestDetail's query but
    returned a different shape ({ data: ... } envelope vs unwrapped).
    They clobbered each other's cache on tab mount, degenerating the
    parent header to "Unknown Client" / "Open" briefly. Unified the
    queryFn shape so the cache stays consistent.

  - interest-tabs.tsx — milestone steps now derive done-state from
    PIPELINE_STAGES.indexOf(currentStage) >= step.advanceStage_idx as
    well as from the date stamp. Stage truth > date truth. Seeded /
    imported interests that arrived past `open` without per-step dates
    now correctly show their milestone steps as checked.

  - interest-detail.tsx — wires useMobileChrome so the mobile topbar
    shows the client name instead of the interest UUID.

  - interest-documents-tab.tsx — empty state restructured to a centered
    "No documents yet — Generate EOI" CTA card instead of a small
    primary button floating in the corner.

  - timeline/route.ts — synthesizes a "Created at <stage>" event when
    no audit-log rows exist for the interest, so the Activity tab
    isn't empty for seeded interests.

  - lead-source-chart.tsx — pie radii switched from fixed 90px/50px
    to "70%"/"40%" so the pie scales with the container instead of
    being clipped at narrow widths; reserved 40px for the legend.

Visual / clarity:

  - interest-detail-header.tsx — Won/Lost rendered as branded text
    buttons on desktop ("Mark won", "Close as lost") and icon-only on
    mobile via `hidden sm:inline`. Edit/Archive stay icon-only. Reopen
    promoted to a labeled button when the interest is closed. Added
    "Last contact Xd ago" to the meta row.

  - detail-header-strip.tsx — py-4 → py-3 (tighter strip).

  - interest-tabs.tsx — milestone cards: the next pending milestone
    gets a brand-blue ring + "NEXT" pill so the user can see at a
    glance which lifecycle to act on. Its primary action gets the
    filled button variant.

  - interest-tabs.tsx — Deposit milestone: invoice flow promoted to
    primary CTA ("Create deposit invoice"), manual stage advance
    demoted to a small text link ("Mark received manually"). Reflects
    the actual recommended path now that recordPayment auto-advances
    on payment.

  - inline-editable-field.tsx — pencil affordance shown faintly
    (opacity-20) at rest so users discover that fields are editable
    without having to hover-test every label. Lifts to opacity-60 on
    hover.

  - constants.ts — STAGE_SHORT_LABELS map for cramped contexts;
    pipeline-chart.tsx + pipeline-funnel-chart.tsx use them on mobile
    via useIsMobile, so the rotated 9-stage axis isn't a wall of
    overlap on a 393px screen.

  - client-pipeline-summary.tsx — StageStepper rebuilt as a single
    segmented progress bar instead of 9 micro-dots + connectors that
    rendered inconsistently at tight widths. Each stage is an equal
    slice that lights up as the interest reaches it; tooltips on hover
    give the full stage name. Also dropped a pre-existing dead `br`
    variable.

  - dashboard empty states — Lead Source, Revenue Breakdown, Pipeline
    Funnel, and Recent Activity now have helpful descriptions explaining
    what populates them, instead of bare "No interests in range".

  - use-paginated-query.ts — reuses `&` when the endpoint already has
    `?`, so callers like the documents hub don't generate
    `…?tab=eoi_queue&signatureOnly=true?page=1&limit=25` (which the API
    rejected as 400). Caught while testing the now-removed EOI route
    but applies broadly.

tsc clean. vitest 832/832 pass. eslint 0 errors (down from 1
pre-existing) on every file touched.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/dashboard/pipeline-funnel-chart.tsx

@@ -4,7 +4,8 @@ import { Bar, BarChart, CartesianGrid, ResponsiveContainer, Tooltip, XAxis, YAxi
 
 import { CardSkeleton } from '@/components/shared/loading-skeleton';
 import { EmptyState } from '@/components/shared/empty-state';
-import { stageLabel } from '@/lib/constants';
+import { useIsMobile } from '@/hooks/use-is-mobile';
+import { STAGE_SHORT_LABELS, safeStage, stageLabel } from '@/lib/constants';
 import { ChartCard } from './chart-card';
 import { useFunnel } from './use-analytics';
 import type { DateRange } from '@/lib/services/analytics.service';
@@ -15,10 +16,12 @@ interface Props {
 
 export function PipelineFunnelChart({ range }: Props) {
   const { data, isLoading } = useFunnel(range);
+  const isMobile = useIsMobile();
 
   const stages = data?.stages ?? [];
+  // Use short labels on mobile so the rotated axis isn't a wall of overlap.
   const chartData = stages.map((s) => ({
-    stage: stageLabel(s.stage),
+    stage: isMobile ? STAGE_SHORT_LABELS[safeStage(s.stage)] : stageLabel(s.stage),
     count: s.count,
     conversionPct: s.conversionPct,
   }));
@@ -41,7 +44,10 @@ export function PipelineFunnelChart({ range }: Props) {
       {isLoading ? (
         <CardSkeleton />
       ) : allZero ? (
-        <EmptyState title="No interests in range" description="Try a longer date range." />
+        <EmptyState
+          title="No interests in range"
+          description="Conversion through Open → EOI → Deposit → Contract appears here. Try a longer date range, or add an interest to see it."
+        />
       ) : (
         <ResponsiveContainer width="100%" height={260}>
           <BarChart data={chartData} margin={{ top: 4, right: 8, left: -16, bottom: 60 }}>