Add platform powder catalog management UI with full CRUD and AI lookup

- PowderCatalogController: Create, Edit, ToggleDiscontinued actions; searchable/filterable/sortable Index with pagination; AiLookup and AiAugmentFromUrl endpoints backed by IInventoryAiLookupService
- New views: Create, Edit, _Form partial (with AI-assisted field population), overhauled Index grid with completeness quality badges and responsive mobile cards
- New ViewModels: PowderCatalogIndexViewModel, PowderCatalogFormViewModel, PowderCatalogListItemViewModel
- AI lookup improvements: SpecificGravity field added to InventoryAiLookupResult; ApplyPowderFallbacks derives CoverageSqFtPerLb from specific gravity when docs omit it; DefaultTransferEfficiency (65%) applied everywhere transfer efficiency is null
- powder-catalog-ai-lookup.js: client-side AI lookup and URL augment wiring for the catalog form

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

TODO.txt.bak

@@ -1,9 +1,9 @@
 Shop Management App TO DO List
 ==============================
--Lookup not working 100% correct.  If I type columbia as the manufacturer and a color name....it's finding blackmamba from prismatic incorrectly.
--Lookup Modal not showing ALL matches.  Maybe make scrollable
--Pickup cure information from TDS Sheet if not found by AI Search
--ON AI Photo Quote page, when the AI info comes back we should scroll the modal window down so it's visible.  It's not clear that new info has been added to the modal for all customers
+-Inventory Lookup not always finding price for Columbia Coatings
+-Logging powder usage and choosing a job doesn't record properly in the activity section of the powder itself
+-Need to allow deleting of powder usage entries, or at least editing in case of a goof up
+
 -Google review request email after a job
 -Check my ChatGPT chat about surface area for a few solid ideas for the system
 -Fix up approve/decline messages between customer and user on quote approval feature
@@ -181,6 +181,10 @@ AI Agent item where we upload a picture and it will calculate the approximate sq
 -When scanning inventory QR Code, there is no cancel button
 -Bug: When scanning Inventory QR Code, if not logged in...it takes you to the dashboard after login, not our inventory scanning screen
 -Add SMS capabilities
+-Lookup not working 100% correct.  If I type columbia as the manufacturer and a color name....it's finding blackmamba from prismatic incorrectly.
+-Lookup Modal not showing ALL matches.  Maybe make scrollable
+-Pickup cure information from TDS Sheet if not found by AI Search
+-ON AI Photo Quote page, when the AI info comes back we should scroll the modal window down so it's visible.  It's not clear that new info has been added to the modal for all customers
 
 Ideas Removed
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