report-fetch-request-ui (#7)

## MR: Fetch Request Pipeline, Report Snapshots, and Admin Filtering

### Summary
Adds fetch request pipeline UI, report snapshot manager, snapshot selector on dashboard, and client-side in-memory filtering for the admin panel. Also overhauls the Home page with feature cards and adds navigation links.

### Changes

**New Pages**
- `/fetch-requests` — Upload bank statements (two-step: upload file, then configure source) or configure email ingestion. Table shows fingerprint (with copy), source type, account, status (color-coded chip), and created date.
- `/reports` — Generate cached report snapshots with filters (ignore self, date range, amount range). Table shows snapshot ID (with copy), creation time, and query summary chips.

**Dashboard**
- Snapshot selector autocomplete dropdown (formatted "Snapshot from {date}"), passes `snapshot_id` to `useReport`
- Styled to match other filter controls (caption above, auto-height)

**Admin — In-Memory Filtering**
- `FilterBar` component: collapsible, Dashboard-style column layout with caption + autocomplete/range/date inputs per filterable field
- `FilterAutocomplete` component: multi-select, free solo, checkmark ticks, selected-first sort frozen while dropdown open (prevents scroll reset)
- `applyClientFilters` in `ResourceView`: handles number range, datetime range, array (object/string elements), non-relation objects, boolean, primitive exact match
- Config-driven via `filterOptions: { mode: "client", fields: [...] }` in `openapi-config.ts`
- Mobile view: each filter takes full width (`flex: "0 0 100%"`), no horizontal squeeze
- `rowCount` omitted in client pagination mode (suppresses MUI X warning)

**Navigation & Home**
- Header nav links: Dashboard, Fetch, Reports
- Home page redesign: gradient hero, "Import Data" CTA, 4 feature cards (Dashboard, Fetch Requests, Report Snapshots, Admin) with accent-colored hover effects

**React-OpenAPI Library**
- `filterOptions` (mode + fields) on `ResourceOverride` and `ResourceConfig` types
- `EnhancedTable` mobile pagination (10 per page with Prev/Next, prevents browser hang with 10000 records)
- `useResource` accepts `filterOptions` from loader

**Misc**
- `public/favicon.png` added, proper `image/png` type in index.html
- 24 files changed, ~1541 insertions, ~100 deletions

### Files Changed (24)
| File | Change |
|------|--------|
| `src/FetchRequests.tsx` | +336 — new page |
| `src/ReportSnapshots.tsx` | +273 — new page |
| `src/features/fetch-requests/` | +96 — models, hooks, index |
| `src/features/report-snapshots/` | +40 — models, hooks, index |
| `src/Dashboard.tsx` | +58 — snapshot selector |
| `src/Home.tsx` | +224 — redesign with feature cards |
| `src/Header.tsx` | +26 — nav links |
| `src/main.jsx` | +4 — routes |
| `react-openapi/components/FilterBar.tsx` | +313 — new component |
| `react-openapi/components/ResourceView.tsx` | +151 — client filtering |
| `react-openapi/components/EnhancedTable.tsx` | +62 — mobile pagination |
| `react-openapi/types/config.ts` | +7 — filterOptions type |
| `react-openapi/types/overrides.ts` | +5 — filterOptions type |
| `react-openapi/utils/openapi_loader.ts` | +8 — load filterOptions |
| `react-openapi/hooks/useResource.ts` | +6 — filterOptions passthrough |
| `react-openapi/index.ts` | +3 — exports |
| `src/openapi-config.ts` | +15 — expenses config |
| `src/features/report/useReport.ts` | +13 — snapshot_id support |
| `index.html` | +1 — favicon link |
| `public/favicon.png` | +2910 bytes |

Reviewed-on: #7
Co-authored-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>
Co-committed-by: Vishesh 'ironeagle' Bangotra <aetoskia@gmail.com>

src/Header.tsx

@@ -91,6 +91,32 @@ export default function Header({
 
         <span style={{ flexGrow: 1 }} />
 
+        {/* NAV LINKS */}
+        <Box
+          sx={{
+            display: { xs: "none", md: "flex" },
+            alignItems: "center",
+            mr: 2,
+            gap: 1,
+          }}
+        >
+          {[
+            { label: "Dashboard", path: "/dashboard" },
+            { label: "Fetch", path: "/fetch-requests" },
+            { label: "Reports", path: "/reports" },
+          ].map(({ label, path }) => (
+            <Button
+              key={path}
+              color="inherit"
+              onClick={() => navigate(path)}
+              sx={{ textTransform: "none", fontWeight: 500, px: 1.5 }}
+              size="small"
+            >
+              {label}
+            </Button>
+          ))}
+        </Box>
+
         {/* AUTH SECTION */}
         {isAuthenticated ? (
           <>