Pre-v0.1.0 polish to the Tags view.

Changes

1. Icon text box shows the friendly name, not a tofu box. A chosen glyph is now shown by its catalogue name (e.g. Settings), falling back to its hex code point (e.g. E8EC) when the glyph isn't in the catalogue. You can also type a name (case-insensitive) and it resolves to the glyph, or type a code as before. The box commits on focus loss, so the friendly form only replaces typed input once editing finishes — never mid-keystroke.

2. Card styling aligned. Tag cards now use the same CardBackgroundFillColorDefaultBrush + 1px CardStrokeColorDefaultBrush border (corner 8 / padding 16) as the Shared parameters and Trash cards. Previously they were a borderless grey fill (SubtleFillColorSecondaryBrush), which stood out in Light theme. Trash already matched; Settings uses the toolkit SettingsCard, which renders with the same card brushes — so Tags, Shared parameters, Trash and Settings are now consistent on background and border. (Content width was already consistent: all four use MaxWidth=720, Padding=24, HorizontalAlignment=Stretch.)

How

• New Core GlyphNameLookup (two-way glyph↔name map). TagIconRowViewModel.GlyphText resolves display/edit through it, falling back to hex via the existing GlyphInput.
• ShellViewModel gained an optional IGlyphCatalogueProvider: production DI injects it (names work); the existing unit tests construct ShellViewModel without it (lookup empty → hex fallback), so nothing broke.
• OpenTagIcons builds the lookup from the catalogue when the view opens.

Testing

• 231 Core unit tests pass (incl. new GlyphText name-display, name→glyph resolution, and hex-fallback cases).
• WinUI head compile-verified on the Windows build agent: 0 warnings, 0 errors.

Note

The custom cards use corner radius 8; the toolkit SettingsCard defaults to 4 — a pre-existing difference left as-is, since the brief was to match tag cards to the Shared parameters cards (8). Easy to unify later if wanted.

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