overhaul provider inventory and agent/model selection (#8652)

Signed-off-by: Bradley Axen <baxen@squareup.com>

ui/goose2/scripts/check-file-sizes.mjs

@@ -36,9 +36,19 @@ const EXCEPTIONS = {
       "Search-as-you-type filtering and draft-aware sidebar highlight logic.",
   },
   "src/app/AppShell.tsx": {
-    limit: 660,
+    limit: 730,
     justification:
-      "Shell still coordinates ACP session loading, replay-buffer cleanup on load failure, project reassignment, and app-level chat routing. Includes gated [perf:load]/[perf:newtab] logging via perfLog (dev-only by default).",
+      "Shell still coordinates ACP session loading, replay-buffer cleanup on load failure, project reassignment, home-session restoration, app-level chat routing, and restored project-draft reuse. Includes gated [perf:load]/[perf:newtab] logging via perfLog (dev-only by default).",
+  },
+  "src/features/chat/hooks/useChatSessionController.ts": {
+    limit: 690,
+    justification:
+      "Controller now centralizes home-to-chat pending state transfer, workspace/project preparation, provider/model/persona handoff, Goose cross-provider model selection sequencing with rollback, and chat input orchestration pending a later decomposition pass.",
+  },
+  "src/features/chat/ui/AgentModelPicker.tsx": {
+    limit: 570,
+    justification:
+      "Agent-first picker currently keeps the full trigger, recommended-model view, searchable full-model view, and ACP/goose-specific labeling logic in one component pending later extraction.",
   },
   "src/features/chat/stores/__tests__/chatSessionStore.test.ts": {
     limit: 540,
@@ -56,7 +66,7 @@ const EXCEPTIONS = {
       "Voice dictation send/stop guards, attachment handling, and mention/picker coordination still share one chat composer component.",
   },
   "src/features/chat/ui/__tests__/ChatInput.test.tsx": {
-    limit: 510,
+    limit: 520,
     justification:
       "Composer regression coverage spans personas, queueing, attachments, and voice-input edge cases in one interaction-heavy suite.",
   },

ui/goose2/scripts/reset-inventory.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+# Reset the provider inventory tables to empty, as if migration 12 just ran.
+# This lets you test the first-use experience (cold inventory).
+#
+# Usage: ./scripts/reset-inventory.sh
+
+set -euo pipefail
+
+DB="${GOOSE_DB:-$HOME/.local/share/goose/sessions/sessions.db}"
+
+if [ ! -f "$DB" ]; then
+  echo "Database not found at $DB"
+  echo "Set GOOSE_DB to override the path."
+  exit 1
+fi
+
+echo "Database: $DB"
+echo ""
+echo "Before:"
+echo "  provider_inventory_entries: $(sqlite3 "$DB" 'SELECT COUNT(*) FROM provider_inventory_entries;')"
+echo "  provider_inventory_models:  $(sqlite3 "$DB" 'SELECT COUNT(*) FROM provider_inventory_models;')"
+
+# ON DELETE CASCADE on provider_inventory_models means deleting entries clears both tables.
+# Delete models first since CASCADE isn't reliable in all sqlite3 builds,
+# then delete entries.
+sqlite3 "$DB" "DELETE FROM provider_inventory_models; DELETE FROM provider_inventory_entries;"
+
+echo ""
+echo "After:"
+echo "  provider_inventory_entries: $(sqlite3 "$DB" 'SELECT COUNT(*) FROM provider_inventory_entries;')"
+echo "  provider_inventory_models:  $(sqlite3 "$DB" 'SELECT COUNT(*) FROM provider_inventory_models;')"
+echo ""
+echo "Inventory tables are empty. Restart goose to test first-use flow."