feat(symbian): add E7 app catalog and GLES2 renderer

[doodlewind]

Summary

• add stable per-app Symbian UID, executable, SIS, receipt, locking, and large embedded-payload link layout support
• extend the Nokia E7 host with a validated embedded .pocket catalog, one-live-guest cold switching, frozen-shot resume, touch, keyboard Home, and live landscape/portrait relayout
• add an OpenGL ES 2.0 renderer for PocketJS DrawList operations, including perspective texture triangles, scissor, texture revision caching, and GPU glyph coverage
• keep the production target registry unchanged while allowing explicit external manifests in the private Symbian launcher build
• add a native PAK tile lookup bridge so large Figma tiles upload directly without QuickJS-side copying/decompression
• isolate concurrent launcher builds and pin the Symbian host/toolchain, receipt, and cache boundaries

Architecture

• Symbian remains a private development profile; no public target or capability registry is changed
• the core still owns DrawList semantics, while the Symbian host owns GLES2 presentation and PAK lookup
• PSP/Vita rendering paths and the 480x272 hero plan remain regression-pinned
• the launcher catalog contains only generic PocketJS apps; the temporary 2D OpenStrike compatibility app is excluded

Validation

• bunx tsc --noEmit
• bun run test: 446 passed, 0 failed, 39 files, 2592 assertions
• bun run golden: 49/49
• bun run tape:check: 180/180
• cargo test --manifest-path engine/core/Cargo.toml: 98/98
• cargo test --manifest-path engine/symbian/Cargo.toml: 8/8
• ARM/Symbian GCCE link succeeds with --no-undefined
• independent architecture review found no P0-P2 issues in the final native tile bridge
• no generated or tracked-file pollution after the full test run

Device acceptance

• Nokia E7 landscape/portrait relayout verified
• perspective Cover Flow verified on the physical device
• Launcher is smooth; Pocket Figma is substantially faster and acceptable on-device
• black footer text regression fixed by using GLES2 GL_LUMINANCE_ALPHA glyph coverage
• Figma E7 controls are discoverable: T/S page, Q/E zoom, Esc fit, arrows pan

Final artifacts

• Launcher launcher-main.sis: 3,714,844 bytes, SHA-256 2938d62d683c0277c8d572c878f49c4764a20afe8e1532aeef099f75fac222dc
• Pocket Figma 0.1.1 (downstream rebuild): 3,259,956 bytes, SHA-256 8ff60f697867f59a75cdb0ade20ebc78e25c35b895c22b3a1550c739483856a8; receipt and payload hashes verified