Let the console search, browse, forget and mount

The store had a write path, a mount path and a search path, and the console
still showed a dashboard of counters. Nothing in the UI could ask what someone
knows, page through atoms, look at a wordless picture, forget one memory, or
mount a cartridge — so the mechanisms built in P0 were invisible.

Backend:
- senses.py: one function decides what this machine can perceive. /api/status
  and doctor each computed it before, which is two truths. Picture atoms are now
  counted by image_ref rather than by modality, so a screenshot crop from a PDF
  counts and a picture whose bytes were deleted stops claiming it can be encoded.
- browse.py: GET /api/atoms pages newest-first through v_atoms_current with
  modality/holder/source filters; GET /api/atoms/{id}/image serves the stored
  bytes so a picture with no OCR text can be looked at.
- Deleted 8 HTTP routes nobody calls (4 benchmark, research modules, dense index,
  visual-contradiction-proof, memory-map). Their functions stay: the CLI and the
  proof checks use them. The surface is 30 routes, pinned as a set by a test so a
  new unused route fails the suite.

Frontend: App.tsx (517 lines) became a 131-line shell plus seven panels that own
their own fetches, and lib/format.ts. types.ts now carries the memory dimensions
the backend has been sending since schema v2.

Two invented fields were rendering lies: AdapterPanel showed gpu_available and
probe_status, which AdapterLoadReport does not have — every machine looked GPU-less
including this one. The panel now shows only what the server says.

Proof: scripts/ui_smoke.sh starts the API on a fresh temp home, serves the built
UI from the same origin, and drives five interactions in a real browser — search
as somebody in a scenario, page and view a wordless picture, forget, mount, read
adapter states with reasons. It prints the mount refusal verbatim rather than
pretending the mount succeeded.

Gates: 263 pytest passed; ruff and mypy clean on the 8 touched backend files
(repo-wide mypy unchanged at 24 errors / 6 files); pyright 0 errors there;
go build/vet/test/gofmt clean; npm build + eslint clean; ui_smoke and
mcp_write_smoke both PASS.

frontend/src/styles.css

@@ -442,3 +442,51 @@ meter {
     align-items: flex-start;
   }
 }
+
+.atom-row {
+  display: flex;
+  gap: 9px;
+  align-items: flex-start;
+}
+
+.atom-body {
+  display: grid;
+  gap: 4px;
+  flex: 1;
+  min-width: 0;
+}
+
+.atom-body header {
+  display: flex;
+  justify-content: space-between;
+  gap: 12px;
+}
+
+.atom-body p,
+.atom-body small {
+  margin: 0;
+  overflow-wrap: anywhere;
+}
+
+.thumb {
+  width: 72px;
+  height: 72px;
+  object-fit: cover;
+  border: 1px solid #d7ded2;
+  border-radius: 6px;
+  background: #ffffff;
+}
+
+.filter-row {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
+  gap: 8px;
+}
+
+.pager {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+  margin-top: 4px;
+}